Method and system for writing high-speed and high-density information based on fluorescence defects in solid material

Abstract

The invention provides a method and a system for writing high-speed and high-density information based on fluorescence defects in a solid material, which can be applied to the technical field of optical information storage. The method comprises the steps that a target writing parameter set corresponding to an information writing mode and a target moving parameter corresponding to the information writing mode are determined, and the target writing parameter set is used for writing information to be written into a solid material; the target movement parameter is used for synchronously moving the solid material in the process of writing the to-be-written information into the solid material; based on the target writing parameter set and the target moving parameter, multiple storage point locations matched with the to-be-written information are generated on the solid material, the multiple storage point locations have fluorescent defects, and the multiple fluorescent defects are matched with the to-be-written information.

Description

Technical Field

[0001] The present disclosure relates to the field of optical information storage technology, and in particular to a method and system for high-speed and high-density information writing based on fluorescent defects in solid materials. Background Art

[0002] With the rapid development of information technology, more and more data needs to be stored. In the existing related technologies, data can be stored in a variety of information storage methods, such as magnetic storage, electrical storage, and optical storage. However, magnetic storage and electrical storage have shortcomings such as high cost, high requirements for storage environment, and easy data loss due to demagnetization, leakage, etc.; the femtosecond fluorescence light defect information storage system, as a candidate for the next generation of storage media, has the advantages of high storage density and low requirements for the storage environment, but the current write rate is low and far from meeting practical requirements. Summary of the invention

[0003] In view of the above problems, the present disclosure provides a method and system for high-speed and high-density information writing based on fluorescent defects in solid materials.

[0004] One aspect of the present disclosure provides a method for high-speed and high-density information writing based on fluorescent defects in a solid material, comprising: determining a target writing parameter group corresponding to an information writing mode and a target movement parameter corresponding to the information writing mode, wherein the target writing parameter group is used to write the information to be written into the solid material, and the target movement parameter is used to synchronously move the solid material in the process of writing the information to be written into the solid material;

[0005] Based on the target writing parameter group and the target moving parameter, a plurality of storage points matching the information to be written are generated on the solid material, wherein the plurality of storage points respectively have fluorescent defects, and the plurality of fluorescent defects match the information to be written.

[0006] According to an embodiment of the present disclosure, the information writing mode includes a single-point writing mode; when the information writing mode is determined to be the single-point writing mode, the target movement parameter is a first movement parameter and the target writing parameter group is a first writing parameter group; the first writing parameter group includes a laser type and a preset pulse width of a laser output by the laser;

[0007] The first movement parameter is determined in the following manner:

[0008] Obtaining a first movement parameter based on a preset writing arc area, a preset distance between adjacent points in a plurality of storage points, and a preset laser frequency;

[0009] Among them, the first movement parameter includes a rotation mode parameter and a rotation speed parameter, the rotation speed parameter includes the rotation speed of the solid material and the speed of radial movement; the laser type and the preset pulse width are used to determine the pulse laser; the pulse width of the pulse laser output by the pulse laser is less than or equal to the preset pulse width, so that when the solid material rotates, the size of the generated storage point belongs to the target size range.

[0010] According to an embodiment of the present disclosure, the first writing parameter group further includes a pulse light amplitude control parameter and a pulse light phase modulation parameter;

[0011] Wherein, the first write parameter group is determined in the following manner;

[0012] Based on a preset coding length, the information to be written is divided into a plurality of sub-information to be written;

[0013] Determining a pulse light phase modulation parameter and a pulse light amplitude control parameter corresponding to each of the plurality of sub-information to be written;

[0014] A first writing parameter group is determined based on the pulse light amplitude control parameters and the pulse light phase modulation parameters corresponding to each of the plurality of sub-information to be written.

[0015] According to an embodiment of the present disclosure, the information writing mode includes a parallel writing mode; when the information writing mode is determined to be the parallel writing mode, the target writing parameter group is a second writing parameter group; the second writing parameter group includes: a maximum parallel number and a second writing parameter sequence;

[0016] The second write parameter group is determined in the following manner:

[0017] Determine the maximum parallel number based on the initial laser energy, the preset mapping relationship and the writing module properties;

[0018] Determine a second write parameter sequence based on the information to be written, the preset code length and the maximum parallel number, wherein the first write parameter sequence includes at least one second write parameter, and the second write parameter is used to write the information to be written into the solid material in parallel;

[0019] A second writing parameter group is obtained based on the maximum parallel number and the second writing parameter sequence.

[0020] According to an embodiment of the present disclosure, based on the information to be written, the preset coding length and the maximum parallel number, determining a first writing parameter sequence includes:

[0021] Based on a preset coding length, the information to be written is divided into a plurality of sub-information to be written;

[0022] Based on the maximum parallel number, a plurality of sub-information to be written are arranged to obtain at least one sub-information dot matrix to be written;

[0023] For each dot matrix of sub-information to be written, mapping each sub-information to be written included in the dot matrix of sub-information to be written is performed based on a preset mapping relationship to obtain a light intensity distribution dot matrix, wherein the light intensity distribution dot matrix includes light intensities corresponding to each of the plurality of sub-information to be written, and different light intensities correspond to different fluorescent defects;

[0024] Inputting the light intensity distribution dot matrix into the parameter determination model to obtain the first writing parameter corresponding to the sub-information dot matrix to be written;

[0025] The first writing parameters corresponding to the at least one writing dot matrix are sorted to obtain a first writing parameter sequence.

[0026] Another aspect of the present disclosure provides a system for high-speed and high-density information writing based on fluorescent defects in solid materials, comprising:

[0027] A processor, configured to determine a target writing parameter group corresponding to the information writing mode and a target movement parameter corresponding to the information writing mode, and to send the target writing parameter group to the corresponding information writing module, and to send the target movement parameter to the base;

[0028] A laser for generating a laser having a laser intensity equal to the initial laser intensity to process a solid material;

[0029] An information writing module, used to modulate the laser based on a target writing parameter group to obtain a modulated laser matching the information to be written;

[0030] An optical transmission module, used for transmitting a modulated laser into a solid material, so that the modulated laser generates a plurality of storage points on the solid material that match the information to be written, wherein the plurality of storage points respectively have fluorescent defects, and the plurality of fluorescent defects match the information to be written;

[0031] The base is used to place the solid material and move the solid material relative to the modulated laser based on the target movement parameters.

[0032] According to an embodiment of the present disclosure, the information writing mode includes a single-point writing mode; when the information writing mode is determined to be the single-point writing mode, the information writing module includes: a laser modulation module and an adaptive optical element;

[0033] A laser modulation module, used for modulating the initial laser intensity of the laser based on the pulse light amplitude control parameter to obtain a first modulated laser whose laser intensity is a target laser intensity, wherein the target laser intensity corresponds to the sub-information to be written, and the sub-information to be written is obtained by splitting the information to be written based on a preset coding length;

[0034] The first adaptive optical element is used to modulate the phase of the first modulated laser based on the pulse light phase modulation parameter so as to control the convergence of the first modulated laser to obtain the second modulated laser.

[0035] According to an embodiment of the present disclosure, a laser modulation module includes: an optical modulator, a driver, a first pulse width processor, and a second pulse width processor;

[0036] A first pulse width processor, whose output end is connected to the input end of the optical modulator, and whose input end is used to receive laser light. The first pulse width processor is used to widen the pulse width of the laser light to reduce the peak power of the laser light to obtain a first processed laser light;

[0037] A driver, used for receiving the pulse light amplitude control parameter and transmitting a sine wave signal with an amplitude equal to the pulse light amplitude control parameter to the optical modulator;

[0038] An optical modulator, used to modulate the initial laser intensity of the laser based on the sinusoidal wave signal to obtain a second processed laser whose laser intensity is the target laser intensity;

[0039] The second pulse width processor is used to receive the second processing laser and to compress the pulse width of the second processing laser to obtain the first modulated laser.

[0040] According to an embodiment of the present disclosure, the information writing mode includes a single point writing mode; in the case where the information writing mode is determined to be the single point writing mode, the target movement parameter is the first movement parameter;

[0041] Wherein, when it is determined that the information writing mode is the single-point writing mode, the base is specifically used for:

[0042] The solid material is placed therein and is used to receive the first movement parameter sent by the processor, and is also used to adjust the movement mode of the base to the rotation mode based on the rotation mode parameter included in the first movement parameter, and is used to perform a rotation operation based on the rotation speed parameter.

[0043] According to an embodiment of the present disclosure, the information writing mode includes a parallel writing mode; in the case where the information writing mode is determined to be the parallel writing mode, the information writing module includes: an adaptive optical element;

[0044] The second adaptive optical element is used to modulate the phase of the laser based on each second writing parameter in the second writing parameter sequence to obtain a laser dot matrix corresponding to the first writing parameter; when the information writing mode is determined to be the parallel writing mode, the base is specifically used to:

[0045] A solid material is placed, and is used to receive a second movement parameter sent by a processor, and is also used to perform a rotation or translation operation based on the second movement parameter.

[0046] According to the method for high-speed and high-density information writing based on fluorescent defects in solid materials disclosed in the present invention, a target writing parameter group is used to write the information to be written into the solid material, and a target movement parameter group is used to synchronously move the solid material during the process of writing the information to be written into the solid material. Therefore, through the target writing parameters and the target movement parameter group, a plurality of storage points matching the information to be written are generated on the solid material, and the plurality of storage points respectively have fluorescent defects. The plurality of fluorescent defects match the information to be written, so that during the writing process of the information to be written, the storage points can be synchronously used for automatic switching, thereby at least partially solving the technical problem of low writing rate in the related art and achieving the technical effect of improving the information writing rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The above contents and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0048] Figure 1 A flowchart schematically shows a method for high-speed and high-density information writing based on fluorescent defects in solid materials according to an embodiment of the present disclosure;

[0049] Figure 2 A schematic diagram of storage points according to an embodiment of the present disclosure is schematically shown;

[0050] Figure 3 A schematic diagram of a writing arc area according to an embodiment of the present disclosure is schematically shown;

[0051] Figure 4 A schematic diagram schematically shows a first writing parameter and a light intensity distribution dot matrix according to an embodiment of the present disclosure;

[0052] Figure 5 A schematic diagram of a system for high-speed and high-density information writing based on fluorescent defects in solid materials according to the first embodiment of the present disclosure is schematically shown;

[0053] Figure 6 A schematic diagram of a modulation waveform of a laser modulating module modulating a laser according to an embodiment of the present disclosure is schematically shown;

[0054] Figure 7 A schematic diagram of a system for high-speed and high-density information writing based on fluorescent defects in solid materials according to a second embodiment of the present disclosure is schematically shown; and

[0055] Figure 8 A schematic diagram of a system for high-speed and high-density information writing based on fluorescent defects in solid materials according to a third embodiment of the present disclosure is schematically shown. DETAILED DESCRIPTION

[0056] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present disclosure. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present disclosure. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0057] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0058] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0059] When using expressions such as "at least one of A, B, and C, etc.", they should generally be interpreted according to the meaning of the expression commonly understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0060] As an excellent information storage system, the solid material femtosecond laser processing fluorescent defect information storage system is a candidate for the next generation of storage media.

[0061] However, the existing femtosecond laser writing technology is still in the experimental stage, and some outstanding advantages have not been fully demonstrated. High storage density is a major feature of this system, but to demonstrate this advantage well, it is urgently needed to have a matching writing speed to achieve high-throughput information transmission to develop its advantages of high storage density. However, there is currently no method or system that can solve this pain point. The current writing rate is at the order of 100Hz, which is far from meeting practical requirements. It is urgent to increase the writing speed to accelerate the promotion and application of this system.

[0062] An embodiment of the present disclosure provides a method for high-speed and high-density information writing based on fluorescent defects in solid materials, including: determining a target write parameter group corresponding to an information writing mode and a target movement parameter corresponding to the information writing mode, wherein the target write parameter group is used to write the information to be written into the solid material, and the target movement parameter is used to synchronously move the solid material during the process of writing the information to be written into the solid material; based on the target write parameter group and the target movement parameter, generating a plurality of storage points on the solid material that match the information to be written, wherein the plurality of storage points respectively have fluorescent defects, and the plurality of fluorescent defects match the information to be written.

[0063] Figure 1 The flowchart of the method for high-speed and high-density information writing based on fluorescent defects in solid materials according to an embodiment of the present disclosure is schematically shown.

[0064] like Figure 1 As shown, the method includes operations S110 to S120.

[0065] In operation S110, a target write parameter group corresponding to the information write mode and a target movement parameter corresponding to the information write mode are determined, wherein the target write parameter group is used to write the information to be written into the solid material, and the target movement parameter is used to synchronously move the solid material during the process of writing the information to be written into the solid material.

[0066] In operation S120, based on the target writing parameter group and the target movement parameter, a plurality of storage sites matching the information to be written are generated on the solid material, wherein the plurality of storage sites respectively have fluorescent defects, and the plurality of fluorescent defects match the information to be written.

[0067] According to an embodiment of the present disclosure, the information writing mode may include a parallel writing mode or a single point writing mode, and different high-speed writing requirements may be met by setting the information writing mode.

[0068] According to an embodiment of the present disclosure, different write modes may correspond to different target write parameter groups and different target movement parameters. According to an embodiment of the present disclosure, the specific material of the solid material is not limited, and may be diamond, silicon carbide, gallium nitride, aluminum nitride, zinc oxide, silicon dioxide, lithium niobate, etc.

[0069] According to an embodiment of the present disclosure, the information to be written may be a digital coding group, and the coding type of the digital coding group is not limited, and may be any coding type such as binary coding, octal coding, decimal coding, etc. The number of coding bits of the digital coding group is not limited, and may be any number of bits. The information to be written may be obtained by digitally encoding the target information to be stored, and the information form of the target information is not limited, and may be text information, image information, etc.

[0070] According to an embodiment of the present disclosure, a preset writing area can be determined in a solid material, so that processing can be performed within the preset writing area to generate multiple storage points. The preset writing area is an area in the solid material where no information is written or an area specified by the user for writing.

[0071] According to the embodiments of the present disclosure, if the fluorescent defects in the storage sites are different, the sub-information to be written stored in the storage sites is different, and by exciting the fluorescent defects, it can be determined that the sub-information to be written stored in the storage sites is different.

[0072] According to the embodiments of the present disclosure, the fluorescent defect includes four dimensions, namely, three-dimensional space and one-dimensional brightness. The fluorescent defect is generated by the interaction between the laser and the solid material, and the energy and writing position of the laser are adjusted to achieve information writing. The defect fluorescence is then excited by the excitation light or wide-field laser source to achieve the reading of the written signal.

[0073] According to the method for high-speed and high-density information writing based on fluorescent defects in solid materials disclosed in the present invention, since the target writing parameter group is used to write the information to be written into the solid material, and the target movement parameter group is used to synchronously move the solid material in the process of writing the information to be written into the solid material, therefore, through the target writing parameters and the target movement parameter group, a plurality of storage points matching the information to be written are generated on the solid material, and the plurality of storage points respectively have fluorescent defects, and the plurality of fluorescent defects match the information to be written, so that during the writing process of the information to be written, the storage points can be synchronously used for automatic switching, thereby at least partially solving the technical problem of low writing rate in the related art and achieving the technical effect of improving the information writing rate.

[0074] According to an embodiment of the present disclosure, the information writing mode includes a single-point writing mode; when the information writing mode is determined to be a single-point writing mode, the target movement parameter is a first movement parameter and the target writing parameter group is a first writing parameter group and the first writing parameter group includes a laser type and a preset pulse width of the laser output laser.

[0075] Among them, the first movement parameter is determined in the following manner: based on a preset writing arc area, a preset distance between adjacent points in a plurality of storage points and a preset laser frequency, the first movement parameter is obtained; the first movement parameter includes a rotation mode parameter and a rotation speed parameter, the rotation mode parameter is used to indicate that the movement mode of the solid material is a rotation mode, and the rotation speed parameter includes the rotation speed of the solid material and the speed of radial movement; the laser type and the preset pulse width are used to determine the pulse laser; the pulse width of the pulse laser output by the pulse laser is less than or equal to the preset pulse width, so that when the solid material rotates, the size of the storage point generated belongs to the target size range.

[0076] According to an embodiment of the present disclosure, the single-point writing mode may be to write information of only one storage point during one writing.

[0077] According to an embodiment of the present disclosure, the first movement parameter may be a parameter corresponding to the movement information of the solid material in the single-point writing mode, and may include a rotation mode parameter and a rotation speed parameter.

[0078] According to the embodiments of the present disclosure, the preset pulse width is not limited and can be set as needed, such as setting the preset pulse width to picosecond level, femtosecond level, etc.

[0079] According to the embodiments of the present disclosure, the target size range of the storage point is determined by the resolution of the readout system and the static point size. The static point size is the size of the storage point generated when the solid material is stationary and under the same conditions, where the same conditions refer to the same laser type, preset pulse width and other conditions.

[0080] According to the embodiments of the present disclosure, for example, the resolution of the readout system is 500nm, and the static point size is 100nm. When the write point has obvious tailing, such as extending from 100nm to 500nm, the distance between the two adjacent points is too small, or even overlaps. At this time, the two adjacent points will have crosstalk, resulting in a decrease in subsequent readout fidelity. If the distance between adjacent points needs to be increased accordingly to ensure high readout fidelity, the storage density will be reduced. For another case, the resolution of the readout system is higher than or close to the storage point size, for example, the storage point size is 100nm. 2 , with a resolution of 10nm. At this time, the tailing caused by rotation is more likely to affect the readout fidelity and storage density. The tolerance size of the tailing needs to be based on the point size as a reference. For example, under the premise of ensuring the storage density, the size increase caused by the tailing needs to be limited to 10% or less of the storage site size.

[0081] According to the embodiments of the present disclosure, writing into a solid material while rotating may produce tailing, resulting in a smaller size of the storage point. By using a pulsed laser type and a pulse width of the output pulsed laser that is less than or equal to a preset pulse width, the size of the storage point generated while the solid material is rotating can fall within the target size range of the storage point generated when the solid material is stationary, thereby achieving fast writing while ensuring writing density.

[0082] According to an embodiment of the present disclosure, the rotation of the solid material can be achieved by adding a base under the solid material.

[0083] According to an embodiment of the present disclosure, the preset writing arc zone may be a preset writing area on a solid material, and may specifically include: a writing area, a writing direction, a writing arc, an arc zone radius, and the like.

[0084] According to an embodiment of the present disclosure, the preset laser parameter frequency may be a preset initial frequency of laser emission of the laser. In some embodiments, in order to increase the writing rate, the maximum laser frequency of the laser may generally be used, such as 80 MHz.

[0085] According to an embodiment of the present disclosure, in some embodiments, the rotation speed parameter may be determined by the following formula (1).

[0086] ; (1)

[0087] in, To preset the laser frequency, is the speed parameter, is the radius of the preset writing arc area, It is the preset distance between adjacent points in multiple stored points.

[0088] According to the embodiments of the present disclosure, in some embodiments, , it can be determined by formula (1) In this embodiment, the pulse width of a single laser is within 200 fs, the displacement of the base is 50 pm, and the size of a single storage site is at the level of 100 nm. Therefore, the rotational movement of the base during writing can be ignored, and the rotation of the base does not affect the writing effect.

[0089] According to an embodiment of the present disclosure, the radial movement speed may be determined by a preset emission frequency of the laser and a preset spacing between the writing arc area and adjacent sites, or may be preset.

[0090] According to the embodiments of the present disclosure, the first movement parameter can be used to achieve uniform rotation of the solid material while writing multiple sub-information to be written. Specifically, the distance between adjacent storage points is controlled by controlling the rotation speed, so that the rotation speed matches the writing frequency and the interval between adjacent storage points, thereby achieving rapid switching of writing points while rotating, and achieving rapid writing of multiple information to be written. This avoids the problems of inaccurate writing position of fluorescent defects and system instability caused by switching points by translating the solid material, while achieving rapid and stable writing of the sub-information to be written. Figure 2 A schematic diagram of storage points according to an embodiment of the present disclosure is schematically shown.

[0091] like Figure 2 As shown, through the method of high-speed and high-density information writing by fluorescent defects in solid materials of the embodiment of the present disclosure, it can be seen that by controlling the rotation speed and the pulse width of the pulsed laser, the size of a single storage point can be made at the level of 100nm. Usually, the writing size of 100nm can only be achieved under the condition of static writing, that is, the solid material does not move. In the embodiment of the present disclosure, by controlling the rotation speed of the solid material and the type of laser, the displacement of the solid material during the writing time is only at the order of pm, so that while writing, the size of a single storage site will not change due to the introduction of the rotation mode, that is, the writing rate can be improved while maintaining a large storage density.

[0092] Figure 3 A schematic diagram of a writing arc area according to an embodiment of the present disclosure is schematically shown.

[0093] like Figure 3 As shown, in different writing areas of the preset writing arc area, the radius of the preset writing arc area can vary. When the solid material is rotated, it can enter the writing areas of different radii in the preset writing arc area through synchronous radial movement, so as to form the following Figure 3 Schematic diagram of the preset writing arc area shown.

[0094] According to an embodiment of the present disclosure, the information writing mode includes a single-point writing mode; when the information writing mode is determined to be the single-point writing mode, the target writing parameter group is the first writing parameter group; the first writing parameter group also includes pulse light amplitude control parameters and pulse light phase modulation parameters.

[0095] Among them, the first writing parameter group is determined in the following way: based on the preset coding length, the information to be written is split into multiple sub-information to be written; the pulse light phase modulation parameters and the pulse light amplitude control parameters corresponding to each of the multiple sub-information to be written are determined; based on the pulse light amplitude control parameters and the pulse light phase modulation parameters corresponding to each of the multiple sub-information to be written, the first writing parameter group is determined.

[0096] According to an embodiment of the present disclosure, the first writing parameter group may include pulse light phase modulation parameters of the adaptive optical element and pulse light amplitude control parameters of the laser modulation module.

[0097] According to an embodiment of the present disclosure, the pulse light phase modulation parameter may be obtained by combining the plasma luminescence intensity of the interaction between the pulse laser and the solid material with a gradient descent algorithm.

[0098] According to an embodiment of the present disclosure, the sub-information to be written may be a digital code with N bits, where N is a positive integer; the preset code length may be used to represent the number of bits of the digital code that can be stored in a storage point.

[0099] According to an embodiment of the present disclosure, the pulse light amplitude control parameter may be determined according to a preset mapping relationship.

[0100] According to an embodiment of the present disclosure, the preset mapping relationship may include a mapping relationship between fluorescence intensity and sub-information to be written. For example, in some embodiments, the laser acts on the storage point to produce a fluorescence defect. When the fluorescence intensity of the fluorescence defect is 0 Hz when the read light is excited, the sub-information to be written is digitally coded 0; when the fluorescence intensity is 5 MHz, the sub-information to be written is digitally coded 1.

[0101] According to an embodiment of the present disclosure, for example, the pulse light amplitude control parameters are 0V, 0.5V, 3V, and 5V, respectively, and their corresponding fluorescence intensities are 0 MHz, 1-2 MHz, 3-4MHz, and 4-5 MHz, respectively. The pulse light amplitude control parameters for writing different sub-information to be written can be determined through a preset mapping relationship.

[0102] According to an embodiment of the present disclosure, specifically, for example: the information to be written is 00011011, and the preset coding length is 2, that is, the sub-information to be written is 00, 01, 10, 11, and it is determined through the preset corresponding relationship that the fluorescence intensities corresponding to the above sub-information to be written are: 0 MHz, 1-2 MHz, 3-4MHz, 4-5 MHz, so that the pulse light amplitude control parameters are 0V, 0.5V, 3V, 5V.

[0103] According to the embodiments of the present disclosure, the pulse light phase modulation parameters can modulate the phase of the laser, thereby avoiding phase distortion of the laser and enhancing the light convergence effect to a certain extent, so that the fluorescence defects generated by the laser processing the storage points are more accurate. The pulse light amplitude control parameters control the input voltage of the laser modulation module, so that the laser modulation module modulates the laser intensity of the laser to an intensity corresponding to the sub-information to be written, so as to generate accurate fluorescence defects, thereby improving the fidelity of information writing.

[0104] According to an embodiment of the present disclosure, the target writing parameter group may further include a preset laser frequency and a laser type. In the single-point writing mode, the laser type may be a pulse laser whose output laser pulse width is a preset pulse width. Since the laser emitted by the pulse laser is a pulse laser, its pulse width is relatively short. Therefore, even if the solid material is rotating at a high speed, there will be no tailing of the storage points generated by the pulse laser hitting the solid material for processing. This makes the size of a single storage point smaller and can achieve a higher storage density. Since the target rotation speed of the solid material is determined by the preset laser frequency, the preset distance between adjacent points, and the radius of the preset writing arc area, in some embodiments, after a pulse laser write is completed and before the next pulse laser is emitted, the solid material is controlled to quickly move to the next storage point so that the next pulse laser can write data at the storage point. This allows the fluorescent defect generated at each storage point to be irradiated with laser only once, thus achieving single-pulse writing. While ensuring high-density storage, it also achieves rapid writing of information. According to an embodiment of the present disclosure, the information writing mode includes a parallel writing mode; when the information writing mode is determined to be the parallel writing mode, the target writing parameter group is a second writing parameter group; the second writing parameter group includes: a maximum parallel number and a second writing parameter sequence.

[0105] Among them, the second write parameter group is determined in the following manner: based on the initial laser energy, the preset mapping relationship and the write module properties, the maximum parallel number is determined; based on the information to be written, the preset coding length and the maximum parallel number, the second write parameter sequence is determined, wherein the second write parameter sequence includes at least one second write parameter, and the second write parameter is used to write the information to be written in parallel into the solid material; based on the maximum parallel number and the second write parameter sequence, the second write parameter group is obtained.

[0106] According to an embodiment of the present disclosure, the parallel writing mode may be a mode capable of writing information to a plurality of storage locations simultaneously.

[0107] According to an embodiment of the present disclosure, the initial laser energy may be the laser energy of laser output by the laser.

[0108] According to an embodiment of the present disclosure, when it is determined that the information writing mode is the parallel writing mode, the target movement parameter may be a second movement parameter, and the second movement parameter may include a rotation mode parameter and a rotation speed parameter, or include a translation mode parameter and a translation parameter according to different requirements. The translation mode parameter may indicate that the solid material performs a translational motion when moving, and the translation parameter may indicate the direction and speed of movement of the solid material when performing the translational motion.

[0109] According to an embodiment of the present disclosure, the writing module attributes may be the attributes of the module itself in the system, for example, the optical transmission module includes the objective lens field of view of the objective lens and the light field uniformity limit value of the adaptive optical element.

[0110] According to an embodiment of the present disclosure, the maximum parallel number is used to represent the number of storage points to which information can be written simultaneously during one write operation, and may also be the number of laser points in a laser dot array during one write operation.

[0111] According to an embodiment of the present disclosure, the second writing parameter sequence may include at least one second writing parameter, a writing order of at least one second writing parameter, a writing time point of at least one second writing parameter, and the like.

[0112] According to an embodiment of the present disclosure, when the number of multiple sub-information to be written is less than or equal to the maximum parallel number, a second write parameter can be used to write multiple sub-information to be written into the solid material in parallel at one time; when the number of multiple sub-information to be written is greater than the maximum parallel number, a part of the sub-information to be written can be written into the solid material in parallel through a second write parameter, and then the remaining sub-information to be written can be written into the solid material in parallel through the remaining second write parameters in the second write parameter sequence.

[0113] According to an embodiment of the present disclosure, fluorescent defects are produced by processing a solid material with lasers having different energies to obtain storage points. Fluorescent defects of different densities correspond to different sub-information to be written. The writing of different sub-information to be written is achieved through the correspondence between the laser energy and the writing laser intensity and a preset mapping relationship.

[0114] According to an embodiment of the present disclosure, when writing information, the information writing mode is first determined, and when the information writing mode is a parallel writing mode, the maximum parallel number of each information writing to the solid material is determined based on the initial laser intensity, the preset mapping relationship and the writing module properties, and the second writing parameter for parallel writing of the information to be written is determined by the maximum parallel number and the information to be written, and a second writing parameter sequence is obtained, thereby realizing parallel writing of the information to be written based on the second writing parameter sequence, the initial laser intensity and the second movement parameter, thereby improving the writing speed. At the same time, because a single site is only irradiated with a single pulse, it perfectly inherits the large storage characteristics of the system, thereby at least partially solving the problem of slow optical storage writing speed existing in the related art, and achieving the technical effect of writing information at a higher speed while meeting high density.

[0115] According to the embodiments of the present disclosure, in addition, by adopting a second movement parameter including a rotation mode parameter and a rotation speed parameter to perform a rotation operation on the solid material, it is possible to achieve fast and smooth switching of storage points while performing parallel writing of information, thereby breaking through the step frequency limitation of the translational displacement stage and avoiding the acceleration and deceleration jerks caused by the translational method, which causes problems such as inaccurate fluorescence defects and system instability, thereby achieving faster information writing.

[0116] According to an embodiment of the present disclosure, determining a first write parameter sequence based on information to be written, a preset encoding length and a maximum parallel number includes the following operations.

[0117] Based on a preset coding length, the information to be written is split into multiple sub-information to be written; based on the maximum parallel number, the multiple sub-information to be written is arranged to obtain at least one dot matrix of sub-information to be written; for each dot matrix of sub-information to be written, based on a preset mapping relationship, each sub-information to be written included in the dot matrix of sub-information to be written is mapped to obtain a light intensity distribution dot matrix, wherein the light intensity distribution dot matrix includes light intensities corresponding to each of the multiple sub-information to be written, and different light intensities correspond to different fluorescent defects; the light intensity distribution dot matrix is ​​input into a parameter determination model to obtain a first writing parameter corresponding to the dot matrix of sub-information to be written; the first writing parameters corresponding to each of the at least one writing dot matrix are sorted to obtain a first writing parameter sequence.

[0118] According to the embodiments of the present disclosure, the lattice dimension of the sub-information lattice to be written can be determined based on the maximum parallel number, and it can be determined whether the number of multiple sub-information to be written is greater than the maximum parallel number. If it is greater, the multiple sub-information to be written can be grouped to obtain multiple sub-information groups to be written; if it is less than or equal to, one sub-information group to be written can be obtained.

[0119] According to an embodiment of the present disclosure, each sub-information group to be written includes a maximum number of parallel sub-information to be written. For each sub-information group to be written, the N sub-information to be written are arranged into a dot matrix of sub-information to be written according to the target order of each of the N sub-information to be written in the sub-information group to be written, wherein the target order can be determined by the position of the sub-information to be written in the information to be written, for example: the information to be written is 101011, sub-information to be written 1 is 10, sub-information to be written 2 is 10, and sub-information to be written 3 is 11, then the target order of sub-information to be written 1, sub-information to be written 2 and sub-information to be written 3 is 1, 2, 3 respectively.

[0120] According to the embodiments of the present disclosure, each sub-information to be written in the sub-information dot matrix is ​​stored in a storage point respectively. When writing, the writing can be performed according to the target order of each of the multiple sub-information to be written, so that the sub-information to be written in adjacent orders are also in adjacent points, so as to facilitate subsequent reading.

[0121] According to an embodiment of the present disclosure, the parameter determination model may be obtained based on an aberration polynomial or a wavefront correction polynomial.

[0122] According to an embodiment of the present disclosure, a sub-information dot matrix to be written may correspond to a first writing parameter, that is, a laser may be modulated into a laser dot matrix matching the sub-information dot matrix to be written through the first writing parameter, thereby realizing writing the sub-information dot matrix to be written into a solid material.

[0123] According to an embodiment of the present disclosure, by splitting the information to be written and predicting the dot matrix of the sub-information to be written after writing multiple sub-information to be written into the solid material, the second writing parameter is determined by the dot matrix of the sub-information to be written and the parameter determination model, thereby accurately realizing the parallel writing of multiple sub-information to be written.

[0124] According to an embodiment of the present disclosure, since multiple sub-information to be written have respective target orderings, at least one write dot matrix also has respective target orderings. Through the target ordering of at least one write dot matrix, the target orderings of the first write parameters corresponding to each of the at least one write dot matrix are determined, thereby ordering the first write parameters to obtain a first write parameter sequence.

[0125] According to an embodiment of the present disclosure, each sub-information to be written in the sub-information dot matrix is ​​mapped to fluorescence intensity through a preset mapping relationship, thereby obtaining a light intensity distribution dot matrix, and then through a parameter determination model, an accurate first writing parameter can be reversed.

[0126] According to an embodiment of the present disclosure, the writing order of each first writing parameter can be determined by the first writing parameter sequence, thereby facilitating the writing of each sub-information to be written.

[0127] Figure 4 A schematic diagram of a first writing parameter and a light intensity distribution array according to an embodiment of the present disclosure is schematically shown.

[0128] like Figure 4 As shown, 410 is a picture identification form of the first writing parameter, which is expressed as a phase diagram, and 420 is a light intensity point distribution matrix.

[0129] According to an embodiment of the present disclosure, determining the maximum parallel number based on the initial laser energy, a preset mapping relationship, and a write module attribute may include: determining the maximum light intensity in the light intensity distribution dot matrix based on the preset mapping relationship; determining a first parallel number range based on the initial laser intensity and the maximum light intensity; determining a second parallel number range based on the objective lens field of view and a preset distance between adjacent points in a plurality of storage points; determining a third parallel number range based on a light field uniformity limit value; and determining the maximum parallel number based on the first parallel number range, the second parallel number range, and the third parallel number range.

[0130] According to an embodiment of the present disclosure, the maximum fluorescence intensity in multiple mapping relationships can be determined through a preset mapping relationship, such as: the fluorescence intensities are: 0 MHz, 1-2 MHz, 3-4MHz, 4-5 MHz, and the sub-information to be written corresponding to the above fluorescence intensities are: 00, 01, 10, 11, that is, the maximum light intensity is 5 MHz, and the maximum laser energy of a single point light is determined through the correspondence between laser energy and laser intensity.

[0131] According to an embodiment of the present disclosure, the first parallel number range is determined by using the following formula (2).

[0132] ; (2)

[0133] in, is the input initial laser energy, is the maximum optical pulse laser energy of a single light spot, is the first parallel number.

[0134] According to the embodiments of the present disclosure, in some embodiments, in order to successfully generate fluorescent defects and obtain the highest encoded brightness, the initial laser energy can be used as the maximum energy of the laser, and the maximum laser energy of a single point of light is determined by requiring that the fluorescence intensity of a point in the light intensity distribution dot matrix reach the maximum light intensity, thereby improving the accuracy of subsequent readings.

[0135] According to the embodiments of the present disclosure, the size of the field of view of the objective lens places a limit on the size of the light intensity distribution dot matrix, and thus also places a limit on the maximum parallel number.

[0136] According to the embodiments of the present disclosure, the preset distance between adjacent points is not limited and can be limited according to actual conditions. Specifically, it can be 500 nm, which is determined by the optical diffraction limit of the readout light and is about 500 nm in the lateral space.

[0137] According to an embodiment of the present disclosure, the light field uniformity limit value may be determined according to the limitation of the adaptive optical element itself, and the light field uniformity limit value is related to the module performance of the adaptive optical element.

[0138] According to the embodiments of the present disclosure, in some embodiments, the initial laser intensity 100uJ, maximum light intensity is is 0.1uJ, so the first parallel number range is ; The field of view of the objective lens is 10×10um. Considering that light will be distorted after exceeding the field of view, affecting the writing fidelity, the second parallel number range is obtained as follows: ; The light field uniformity limit value of the adaptive optical element requires that the light field uniformity is >90% , that is, when the light field uniformity is required to be >90%, the third parallel number range can be , by dividing the above three parallel number ranges, the maximum parallel number is determined to be 380.

[0139] According to the embodiments of the present disclosure, by considering multiple factors such as write module properties and single-point laser intensity when determining the maximum parallel number, parallel writing can be achieved while also ensuring better write fidelity during writing.

[0140] Figure 5 The schematic diagram of a system for high-speed and high-density information writing based on fluorescent defects in solid materials according to the first embodiment of the present disclosure is schematically shown.

[0141] like Figure 5 As shown, the system may include a processor 510, a laser 520, an information writing module, an optical transmission module, and a base 560. When the information writing mode is determined to be a single-point writing mode, the information writing module includes: a laser modulation module and an adaptive optical element. The adaptive optical element includes at least one, for example: a first adaptive optical element 541 and a second adaptive optical element 542 in this embodiment.

[0142] The processor 510 is used to determine a target writing parameter group corresponding to the information writing mode and a target movement parameter corresponding to the information writing mode, and to send the target writing parameter group to the corresponding information writing module, and to send the target movement parameter to the base 560.

[0143] The laser 520 is used to generate a laser with a laser intensity equal to the initial laser intensity to process the solid material 550 .

[0144] The information writing module is used to modulate the laser based on the target writing parameter group to obtain the modulated laser matching the information to be written.

[0145] The optical transmission module is used to transmit the modulated laser to the solid material 550 so as to generate a plurality of storage points on the solid material 550 that match the information to be written, wherein the plurality of storage points respectively have fluorescent defects, and the plurality of fluorescent defects match the information to be written.

[0146] The base 560 is used to place the solid material 550 and move the solid material 550 relative to the modulated laser based on the target movement parameters.

[0147] The laser modulation module is used to modulate the initial laser intensity of the laser based on the pulse light amplitude control parameter to obtain a first modulated laser whose laser intensity is a target laser intensity, wherein the target laser intensity corresponds to the sub-information to be written, and the sub-information to be written is obtained by splitting the information to be written based on a preset coding length.

[0148] The adaptive optical element is used to modulate the phase of the first modulated laser based on the pulse light phase modulation parameter so as to control the convergence of the first modulated laser to obtain the second modulated laser.

[0149] According to an embodiment of the present disclosure, the optical transmission module is located between the laser 520 and the first adaptive optical element 541, between the second adaptive optical element 542 and the base 560, and between at least one adaptive optical element, and includes: a first half-wave plate, a polarization beam splitter, a second half-wave plate, multiple mirrors, multiple lenses, an objective lens, and a dichroic mirror.

[0150] According to an embodiment of the present disclosure, the laser modulation module can adjust the laser intensity by changing the input voltage intensity at a frequency of the order of 100 MHz, so that the laser intensity can continuously change between 0 and the maximum value. The laser modulation module can be used as a light field convolution function in the optical path, so that certain pulsed lasers can be selectively reduced or turned off based on the laser output by the laser 520. According to an embodiment of the present disclosure, the first half-wave plate, the polarization beam splitter, and the second half-wave plate can be combined to adjust the intensity and polarization of the laser. In some embodiments, the digital code can be represented by combining the polarization of the light with the fluorescence brightness, that is, the preset mapping relationship can also include the corresponding relationship between the polarization of the light and the digital code.

[0151] According to an embodiment of the present disclosure, a reflective mirror may be used to change the propagation direction of the laser.

[0152] According to an embodiment of the present disclosure, both the first adaptive optical element 541 and the second adaptive optical element 542 may be deformable mirrors or spatial light modulators.

[0153] According to the embodiments of the present disclosure, when it is determined that the information writing mode is a single-point writing mode, the laser type that can be used is a pulsed laser through the laser type and the preset pulse width of the laser output laser. According to the limit value of the preset pulse, a laser with a pulse width of the output pulsed laser less than the preset pulse width can be selected, such as: femtosecond lasers, picosecond lasers, attosecond lasers and other lasers with shorter pulse widths. There is no limitation on the wavelength of the laser 520, which can be 520nm, etc. Since the time is short enough, fluorescent defects can be generated in the solid material.

[0154] According to an embodiment of the present disclosure, the laser 520 may be a pulse laser 520 , and therefore, a single output laser may also be referred to as a pulse laser.

[0155] According to the embodiments of the present disclosure, the lens can be used to ensure the normal operation of the system. For example, the lens located between the reflector and the first adaptive optical element 541 can make the laser output by the first adaptive optical element 541 approximately equivalent to the phase of the adaptive optical element added to the Fourier plane of the objective lens.

[0156] According to the embodiments of the present disclosure, the objective lens can reduce the writing size of a single laser spot, improve storage density, and improve writing fidelity.

[0157] According to an embodiment of the present disclosure, the pulse light phase modulation parameter may include a phase modulation sub-parameter of at least one adaptive optical element.

[0158] According to an embodiment of the present disclosure, in the single-point writing mode, the adaptive optical element receives the pulse light phase modulation parameters sent by the controller, and phase-modulates the first modulated light by the pulse light phase modulation parameters, thereby correcting the aberration of the writing light.

[0159] According to the embodiment disclosed herein, the laser modulation module includes: an optical modulator, a driver, a first pulse width processor, and a second pulse width processor;

[0160] The first pulse width processor has an output end connected to the input end of the optical modulator, and the input end is used to receive laser light. The first pulse width processor is used to widen the pulse width of the laser to reduce the peak power of the laser and obtain a first processed laser.

[0161] The driver is used for receiving the pulse light amplitude control parameter and transmitting a sine wave signal with an amplitude equal to the pulse light amplitude control parameter to the optical modulator.

[0162] The optical modulator is used to modulate the initial laser intensity of the laser based on the sine wave signal to obtain a second processed laser whose laser intensity is the target laser intensity.

[0163] The second pulse width processor is used to receive the second processing laser and to compress the pulse width of the second processing laser to obtain the first modulated laser.

[0164] According to the embodiments of the present disclosure, there is no limitation on the implementation of the driver, and the driver may be any device capable of driving the optical modulator, such as an arbitrary wave generator (AWG).

[0165] According to the embodiments of the present disclosure, there is no limitation on the implementation of the optical modulator, and the optical modulator may be any device capable of modulating the intensity of laser light, such as an acousto-optic modulator (AOM).

[0166] According to the embodiment of the present disclosure, there is no limitation on the implementation of the first pulse width processor and the second pulse width processor, and they may be implemented by using a chirp pair.

[0167] According to an embodiment of the present disclosure, a first pulse width processor is placed at the input end of an optical modulator, and a second pulse width processor is placed at the output end of the optical modulator. The first pulse width processor can widen the pulse laser emitted by the laser to the ns level to reduce its peak power, so that the system can controllably adjust the pulse intensity without damaging the optical modulator components, and after passing through the optical modulator, the pulse width is compressed back to the original level of the pulse laser through the second pulse width processor without affecting the write peak power.

[0168] According to the embodiments of the present disclosure, the driver can output a sine wave signal with a fixed frequency but adjustable amplitude, and send the sine wave signal to the optical modulator. Since the power of the diffraction spot selected by the optical modulator depends on the amplitude of the input sine wave signal, the intensity of a single pulse laser can be controlled at a frequency of hundreds of MHz.

[0169] According to the embodiments of the present disclosure, in some embodiments, the information to be written is 00100111. According to the preset number of coding bits, the sub-information to be written can be determined to be: 00, 10, 01, 11, and each sub-information to be written can be written to a storage point. According to the first writing parameter, it can be determined that for the above sub-information to be written, the pulse light amplitude control parameters of the laser modulation module are: 0V, 0.5V, 3V, 5V respectively.

[0170] According to an embodiment of the present disclosure, specifically, the laser 520 can emit a frequency of The base 560 rotates steadily at the target speed, the focus of the objective lens is aligned with the preset writing arc area, and the laser modulation module performs 0V voltage input for a certain period of time, The 0.5V voltage input is 3V voltage input for long time, The 5V voltage input of the same duration causes the corresponding sub-information 00, 10, 01, 11 to be written to the adjacent storage locations 0, 1, 2, 3.

[0171] Figure 6 The figure schematically shows a modulation waveform diagram of the laser modulation module 710 modulating the laser according to the embodiment of the present disclosure.

[0172] like Figure 6 As shown, 610 is a waveform diagram of the pulsed laser, 620 is a waveform diagram of the output after being modulated by the optical modulator, and 630 is a waveform diagram of the output of the second pulse width processor, which is also a waveform diagram of the pulsed laser input to the solid sample.

[0173] According to the embodiment disclosed herein, when the information writing mode is determined to be the single-point writing mode, the target movement parameter is the first movement parameter;

[0174] Among them, when it is determined that the information writing mode is a single-point writing mode, the base 560 is specifically used to: place solid materials, and to receive the first movement parameter sent by the processor, and to adjust the movement mode of the base 560 to a rotation mode based on the rotation mode parameter included in the first movement parameter, and to perform a rotation operation based on the rotation speed parameter.

[0175] According to an embodiment of the present disclosure, the base can be considered as a rotating table in the single-point writing mode.

[0176] According to the embodiments of the present disclosure, in some embodiments, for the storage of a large amount of information, one arc cannot store all the information to be written, so when applied, the writing area can move slowly radially while the base rotates.

[0177] According to the embodiments of the present disclosure, the solid material is rotated by a rotating base to achieve rapid switching of the writing position, and the parameters of the laser can be controlled to output the maximum laser frequency. Thus, the rotation speed of the base, the pulse light amplitude control parameters configured by the laser modulation module, and the maximum laser repetition frequency are matched to achieve high-density and high-speed writing.

[0178] Figure 7 A schematic diagram of a system for high-speed and high-density information writing based on fluorescent defects in solid materials according to a second embodiment of the present disclosure is schematically shown.

[0179] like Figure 7 As shown, the system may include a processor 710, a laser 720, an information writing module, an optical transmission module, and a base 750. The information writing mode includes a parallel writing mode; when the information writing mode is determined to be the parallel writing mode, the information writing module includes: an adaptive optical element. The adaptive optical element includes at least one, for example: a first adaptive optical element 731 and a second adaptive optical element 732 in this embodiment.

[0180] The processor 710 is used to determine a target writing parameter group corresponding to the information writing mode and a target movement parameter corresponding to the information writing mode, and to send the target writing parameter group to the corresponding information writing module, and to send the target movement parameter to the base.

[0181] The laser 720 is used to generate a laser with a laser intensity equal to the initial laser intensity to process a solid material.

[0182] The information writing module is used to modulate the laser based on the target writing parameter group to obtain the modulated laser matching the information to be written.

[0183] The optical transmission module is used to transmit the modulated laser to the solid material so that the modulated laser processes multiple storage points of the solid material, so that fluorescent defects corresponding to the information to be written are generated at the multiple storage points.

[0184] The base 750 is used to place a solid material and move the solid material relative to the modulated laser based on a target movement parameter.

[0185] The adaptive optical element is used to modulate the phase of the laser based on each first writing parameter in the second writing parameter sequence to obtain a laser dot array corresponding to the second writing parameter.

[0186] When the information writing mode is determined to be the parallel writing mode, the base 750 is specifically used to place a solid material, to receive a second movement parameter sent by the processor 710, and to perform a rotation or translation operation based on the second movement parameter.

[0187] According to an embodiment of the present disclosure, the optical transmission module is located between the laser 720 and the first adaptive optical element 731, between the second adaptive optical element 732 and the base 750, and between at least one adaptive optical element, and includes: an objective lens, a first half-wave plate, a polarization beam splitter, a second half-wave plate, multiple reflectors, multiple lenses, and a dichroic mirror.

[0188] According to an embodiment of the present disclosure, the second writing parameters may include a first element parameter for the first adaptive optical element 731 and a second element parameter for the second adaptive optical element 732. The first point adaptive optical element is used to perform a first phase modulation on the laser to obtain an initial laser dot matrix, and the second adaptive optical element 732 is used to perform a second phase modulation on the initial laser dot matrix to obtain a laser dot matrix. The first adaptive optical element 731 may be a coarse adjustment, and the second adaptive optical element 732 may be a fine adjustment. Thus, through two phase modulations, a laser dot matrix capable of generating accurate fluorescence defects is obtained.

[0189] According to an embodiment of the present disclosure, both the first point adaptive optical element and the second adaptive optical element 732 may be deformable mirrors or spatial light modulators.

[0190] According to an embodiment of the present disclosure, in the parallel writing mode, the type of the laser 720 is not limited and may be a femtosecond laser 720, a common laser 720, etc., and the wavelength of the laser 720 is not limited and may be 520 nm, etc.

[0191] According to an embodiment of the present disclosure, the laser 720 may be a pulsed laser 720 , and therefore, a single laser output by the laser 720 may also be referred to as a pulsed laser.

[0192] According to an embodiment of the present disclosure, the processor may be a computer, a dedicated data processing chip, etc. According to an embodiment of the present disclosure, the processor is also used to obtain a first movement parameter based on a preset writing arc area, a preset distance between adjacent points in a plurality of storage points, and a preset laser frequency. The processor is also used to split the information to be written into a plurality of sub-information to be written based on a preset coding length; determine a pulse light phase modulation parameter and a pulse light amplitude control parameter corresponding to each of the plurality of sub-information to be written; and determine a first writing parameter group based on the pulse light amplitude control parameter and the pulse light phase modulation parameter corresponding to each of the plurality of sub-information to be written.

[0193] According to an embodiment of the present disclosure, the processor is also used to determine the maximum parallel number based on the initial laser energy, the preset mapping relationship and the writing module properties; determine the second writing parameter sequence based on the information to be written, the preset coding length and the maximum parallel number, wherein the first writing parameter sequence includes at least one second writing parameter, and the second writing parameter is used to write the information to be written into the solid material in parallel; based on the maximum parallel number and the second writing parameter sequence, obtain the second writing parameter group.

[0194] According to an embodiment of the present disclosure, the processor is also used to split the information to be written into multiple sub-information to be written based on a preset coding length; arrange the multiple sub-information to be written based on the maximum parallel number to obtain at least one sub-information to be written dot matrix; for each sub-information to be written dot matrix, map each sub-information to be written included in the sub-information to be written dot matrix based on a preset mapping relationship to obtain a light intensity distribution dot matrix, wherein the light intensity distribution dot matrix includes light intensities corresponding to each of the multiple sub-information to be written, and different light intensities correspond to different fluorescent defects; input the light intensity distribution dot matrix into the parameter determination model to obtain a first writing parameter corresponding to the sub-information to be written dot matrix; sort the first writing parameters corresponding to each of the at least one writing dot matrix to obtain a first writing parameter sequence. According to an embodiment of the present disclosure, in the parallel writing mode, the base 750 can be considered as a translation stage or a rotation stage.

[0195] According to an embodiment of the present disclosure, the laser dot matrix may include multiple laser points. The laser can be modulated into a laser dot matrix through a first writing parameter, and the energy of each laser point in the laser dot matrix can be controlled, so that after the solid material is processed by the laser dot matrix, fluorescent defects can be generated at multiple storage points of the solid material. When the fluorescent defect is irradiated by an optical signal, the fluorescence intensity of the storage point can be indicated, thereby determining the sub-information to be written stored at the storage point.

[0196] According to the embodiments of the present disclosure, the correspondence between laser energy and fluorescence intensity can be predetermined. In some embodiments, the energy P1 of any point in the preset laser dot matrix and the fluorescence intensity written therein are 0 Hz / s, and the corresponding digital code can be 0. The energy P2 of any point in the preset laser dot matrix and the fluorescence intensity written therein are 1 Hz / s, and the corresponding digital code can be 1, thereby realizing the mapping from the preset single pulse energy to the digital code.

[0197] According to the embodiments of the present disclosure, the adaptive optical element is used to generate a laser dot array with controllable intensity. However, the adjustment range of the adaptive optical element is limited. When the parallel number of the laser dot array is too large, the spot pattern of a single light spot is distorted, causing the fluorescence intensity of the writing site to deviate from the ideal value, resulting in a decrease in the fidelity of information writing. Therefore, it is necessary to determine the maximum number of parallel writing points to ensure the fidelity of information writing.

[0198] According to the embodiments of the present disclosure, the adaptive optical element can realize refractive index mismatch wavefront correction while modulating the laser to form a laser dot array, reduce the dot size, improve the storage density, improve the defect density of the write point, and improve the write-read fidelity.

[0199] According to the embodiments of the present disclosure, in some embodiments, the information to be written is 00011011, the preset code length is 2, the sub-information to be written is 00, 01, 10, 11, the maximum parallel number is 2, and the first write parameter sequence is determined as The objective lens or the base is moved so that the focus of the objective lens is focused on the preset writing area, so that the adaptive optical element passes 00 and 01 can be written to their respective storage points. 10 and 11 can be written into their respective storage points.

[0200] According to the embodiments of the present disclosure, the maximum pulse energy output by the laser 720 can reach the mJ level, and the field of view of the objective lens is in the order of hundreds of um. Therefore, the limitation of the maximum number of parallel operations often appears in the modulation capability of the adaptive optical element. When a single adaptive optical element adjusts the uniformity of the light field to 90%, the number of parallel operations is in the order of k, so the number of parallel operations is limited by the adaptive optical element in the order of k; the speed of the adaptive optical element is in the order of kHz, so the increase multiple of the parallel writing rate depends on the number of parallel operations, that is, it can be k times that of single-point writing.

[0201] Figure 8 A schematic diagram of a system for high-speed and high-density information writing based on fluorescent defects in solid materials according to a third embodiment of the present disclosure is schematically shown.

[0202] like Figure 8 As shown, the system includes: a processor 810, a writing laser 820, a position determination laser 870, an adaptive optical element, a laser modulation module 830, an optical transmission module, a phase modulation module 880, a photon detector 890 and a base 750, and there is at least one adaptive optical element, such as a first adaptive optical element 841 and a second adaptive optical element 842.

[0203] According to an embodiment of the present disclosure, the optical transmission module is located between the writing laser 820 and the adaptive optical element, between the adaptive optical element and the base 860, between the determination laser 870 and the phase modulation module 880, between the third dot matrix control submodule and the base 750, and between at least one adaptive optical element, and includes: an objective lens, a first half-wave plate, a polarization beam splitter, a second half-wave plate, multiple reflectors, multiple lenses, a first dichroic mirror, and a second dichroic mirror.

[0204] According to an embodiment of the present disclosure, the position determination laser 870 may be a laser used to determine a writing area before writing is performed using the writing laser 820 .

[0205] According to an embodiment of the present disclosure, the phase modulation module 880 may be used to perform phase modulation on the laser light emitted by the position determination laser 870 .

[0206] According to an embodiment of the present disclosure, the photon detector 890 is used to detect the spatial distribution of the intensity of the optical signal emitted by the solid material 850 to facilitate subsequent information reading.

[0207] According to the embodiments of the present disclosure, the adaptive optical element has different functions when in different information writing modes. For example, in the case of parallel writing mode, the adaptive optical element is used to modulate the phase of the laser based on each first writing parameter in the first writing parameter sequence to obtain a laser dot matrix corresponding to the first writing parameter. In the case of single point writing mode, the adaptive optical element is used to modulate the phase of the first modulated laser based on the pulse light phase modulation parameter to control the convergence of the first modulated laser to obtain the second modulated laser.

[0208] According to an embodiment of the present disclosure, in the case of parallel writing mode, the laser modulation module 830 may be used or not.

[0209] According to an embodiment of the present disclosure, writing laser 820 is the same as laser 520 and laser 620 .

[0210] According to an embodiment of the present disclosure, Figure 5 , Figure 7 as well as Figure 8 The implementation in represents the propagation path of the laser, and the dotted line represents the data interaction between the modules. The flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment, or a part of the code, and the above module, program segment, or a part of the code contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart, can be implemented with a dedicated hardware-based system that performs the specified functions or operations, or can be implemented with a combination of dedicated hardware and computer instructions.

[0211] It will be appreciated by those skilled in the art that the features described in the various embodiments of the present disclosure may be combined and / or combined in a variety of ways, even if such combinations or combinations are not explicitly described in the present disclosure. In particular, without departing from the spirit and teachings of the present disclosure, the features described in the various embodiments of the present disclosure may be combined and / or combined in a variety of ways. All of these combinations and / or combinations fall within the scope of the present disclosure.

[0212] The embodiments of the present disclosure are described above. However, these embodiments are only for illustrative purposes and are not intended to limit the scope of the present disclosure. Although the embodiments are described above, this does not mean that the measures in the various embodiments cannot be used in combination to advantage. Without departing from the scope of the present disclosure, those skilled in the art may make a variety of substitutions and modifications, which should all fall within the scope of the present disclosure.

Claims

1. A method for high-speed and high-density information writing based on fluorescent defects in solid materials, characterized in that: The method comprises: Determining a target write parameter group corresponding to an information write mode and a target movement parameter corresponding to the information write mode, wherein the target write parameter group is used to write the information to be written into the solid material, and the target movement parameter is used to synchronously move the solid material during the process of writing the information to be written into the solid material; Based on the target writing parameter group and the target movement parameter, a plurality of storage points matching the information to be written are generated on the solid material, wherein the plurality of storage points respectively have fluorescent defects, and the plurality of fluorescent defects match the information to be written.

2. The method according to claim 1, characterized in that The information writing mode includes a single point writing mode; when it is determined that the information writing mode is the single point writing mode, the target movement parameter is a first movement parameter and the target writing parameter group is a first writing parameter group; the first writing parameter group includes a laser type and a preset pulse width of a laser output by the laser; The first movement parameter is determined in the following manner: The first movement parameter is obtained based on a preset writing arc area, a preset distance between adjacent points in the plurality of storage points, and a preset laser frequency; Among them, the first movement parameter includes a rotation mode parameter and a rotation speed parameter, the rotation mode parameter is used to indicate that the movement mode of the solid material is a rotation mode, and the rotation speed parameter includes the rotation speed of the solid material and the speed of radial movement; the laser type and the preset pulse width are used to determine the pulse laser; the pulse width of the pulse laser output by the pulse laser is less than or equal to the preset pulse width, so that when the solid material rotates, the size of the generated storage point belongs to the target size range.

3. The method according to claim 2, characterized in that The first writing parameter group also includes pulse light amplitude control parameters and pulse light phase modulation parameters; Wherein, the first write parameter group is determined in the following manner; Based on a preset coding length, splitting the information to be written into a plurality of sub-information to be written; Determining a pulse light phase modulation parameter and a pulse light amplitude control parameter corresponding to each of the plurality of sub-information to be written; The first writing parameter group is determined based on the pulse light amplitude control parameters and the pulse light phase modulation parameters corresponding to each of the plurality of sub-information to be written.

4. The method according to claim 1, characterized in that The information writing mode includes a parallel writing mode; when it is determined that the information writing mode is the parallel writing mode, the target writing parameter group is a second writing parameter group; the second writing parameter group includes: a maximum parallel number and a second writing parameter sequence; The second write parameter group is determined in the following manner: Determining the maximum parallel number based on the initial laser energy, the preset mapping relationship and the writing module attributes; Determine a second write parameter sequence based on the information to be written, the preset encoding length and the maximum parallel number, wherein the first write parameter sequence includes at least one second write parameter, and the second write parameter is used to write the information to be written into the solid material in parallel; The second writing parameter group is obtained based on the maximum parallel number and the second writing parameter sequence.

5. The method according to claim 4, characterized in that The step of determining a first write parameter sequence based on the information to be written, the preset code length and the maximum parallel number includes: Based on the preset code length, split the information to be written into a plurality of sub-information to be written; Based on the maximum parallel number, a plurality of sub-information to be written are arranged to obtain at least one dot matrix of sub-information to be written; For each of the sub-information to be written dot matrixes, mapping each sub-information to be written included in the sub-information to be written dot matrix based on the preset mapping relationship to obtain a light intensity distribution dot matrix, wherein the light intensity distribution dot matrix includes light intensities corresponding to each of the plurality of sub-information to be written, and different light intensities correspond to different fluorescent defects; Inputting the light intensity distribution dot matrix into the parameter determination model to obtain a first writing parameter corresponding to the sub-information dot matrix to be written; The first writing parameters corresponding to at least one of the writing dot arrays are sorted to obtain the first writing parameter sequence.

6. A system for high-speed and high-density information writing based on fluorescent defects in solid materials, characterized in that: The system comprises: A processor, configured to determine a target writing parameter group corresponding to an information writing mode and a target movement parameter corresponding to the information writing mode, and to send the target writing parameter group to a corresponding information writing module, and to send the target movement parameter to a base; A laser, used to generate a laser with a laser intensity equal to the initial laser intensity, so as to process the solid material; An information writing module, used for modulating the laser based on the target writing parameter group to obtain a modulated laser matching the information to be written; An optical transmission module, used for transmitting the modulated laser to the solid material, so that the modulated laser generates a plurality of storage points on the solid material that match the information to be written, wherein the plurality of storage points respectively have fluorescent defects, and the plurality of fluorescent defects match the information to be written; The base is used for placing a solid material and moving the solid material relative to the modulated laser based on the target movement parameter.

7. The system according to claim 6, characterized in that The information writing mode includes a single-point writing mode; when it is determined that the information writing mode is the single-point writing mode, the information writing module includes: a laser modulation module and an adaptive optical element; The laser modulation module is used to modulate the initial laser intensity of the laser based on the pulse light amplitude control parameter to obtain a first modulated laser whose laser intensity is a target laser intensity, wherein the target laser intensity corresponds to the sub-information to be written, and the sub-information to be written is obtained by splitting the information to be written based on the preset code length; The first adaptive optical element is used to modulate the phase of the first modulated laser based on the pulse light phase modulation parameter, so as to control the convergence of the first modulated laser to obtain the second modulated laser.

8. The system according to claim 7, characterized in that The laser modulation module includes: an optical modulator, a driver, a first pulse width processor and a second pulse width processor; A first pulse width processor, whose output end is connected to the input end of the optical modulator, and whose input end is used to receive the laser, and the first pulse width processor is used to widen the pulse width of the laser to reduce the peak power of the laser to obtain a first processed laser; The driver is used to receive the pulse light amplitude control parameter and transmit a sine wave signal with an amplitude equal to the pulse light amplitude control parameter to the optical modulator; The optical modulator is used to modulate the initial laser intensity of the laser based on the sinusoidal wave signal to obtain a second processed laser whose laser intensity is the target laser intensity; The second pulse width processor is used to receive the second processing laser and to compress the pulse width of the second processing laser to obtain the first modulated laser.

9. The system according to claim 6, characterized in that The information writing mode includes a single point writing mode; when it is determined that the information writing mode is the single point writing mode, the target movement parameter is a first movement parameter; Wherein, when it is determined that the information writing mode is a single-point writing mode, the base is specifically used for: The solid material is placed therein and is used to receive the first movement parameter sent by the processor, and is also used to adjust the movement mode of the base to the rotation mode based on the rotation mode parameter included in the first movement parameter, and is used to perform a rotation operation based on a rotation speed parameter.

10. The system according to claim 6, characterized in that The information writing mode includes a parallel writing mode; when it is determined that the information writing mode is the parallel writing mode, the information writing module includes: an adaptive optical element; The second adaptive optical element is used to modulate the phase of the laser based on each second writing parameter in the second writing parameter sequence to obtain a laser dot matrix corresponding to the first writing parameter; when it is determined that the information writing mode is a parallel writing mode, the base is specifically used to: A solid material is placed, and is used to receive a second movement parameter sent by the processor, and is also used to perform a rotation or translation operation based on the second movement parameter.

Images