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

Abstract

The present application discloses a method for performing high-speed and high-density information writing based on fluorescence defects in a solid material, which is applicable to the technical field of optical information storage. The method comprises: determining a target writing parameter set corresponding to an information writing mode and a target movement parameter corresponding to the information writing mode, wherein the target writing parameter set is used for writing information to be written into a solid material, and the target movement parameter is used for synchronously moving the solid material while the information is written into the solid material; and on the basis of the target writing parameter set and the target movement parameter, generating, on the solid material, a plurality of storage points matching 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. Further disclosed is a system for performing high-speed and high-density information writing based on fluorescent defects in a solid material.

Description

A method and system for high-speed, high-density information writing based on fluorescence defects in solid materials Technical Field

[0001] This disclosure relates to the field of optical information storage technology, and specifically to a method and system for high-speed, high-density information writing based on fluorescence defects in solid materials. Background Technology

[0002] With the rapid development of information technology, the amount of data that needs to be stored is also increasing. Existing technologies can store data using various methods, such as magnetic storage, electrical storage, and optical storage. However, magnetic and electrical storage have drawbacks, including high cost, stringent requirements for the storage environment, and susceptibility to data loss due to demagnetization or leakage. Femtosecond fluorescent optical defect storage systems, as candidates for next-generation storage media, possess advantages such as high storage density and less stringent requirements for the storage environment, but currently have low write speeds, far from meeting practical requirements. Summary of the Invention

[0003] To address the aforementioned problems, this disclosure provides a method and system for high-speed, high-density information writing based on fluorescence defects in solid materials.

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

[0005] Based on the target writing parameter set and the target movement parameter, multiple storage points matching the information to be written are generated on the solid material. Each of the multiple storage points has a fluorescence defect, and the multiple fluorescence defects match the information to be written.

[0006] According to embodiments of this 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; the first writing parameter group includes the laser type and the preset pulse width of the laser output laser.

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

[0008] The first movement parameter is obtained based on the preset writing arc area, the preset distance between adjacent points in multiple storage points, and the preset laser frequency;

[0009] The first movement parameter includes rotation mode parameter and rotation speed parameter. The rotation speed parameter includes the rotation speed of the solid material and the radial movement speed. The laser type and 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 the size of the storage point generated during the rotation of the solid material is within the target size range.

[0010] According to embodiments of this disclosure, the first writing parameter group further includes pulse light amplitude control parameters and pulse light phase modulation parameters;

[0011] The first set of write parameters is determined in the following way;

[0012] Based on the preset encoding length, the information to be written is split into multiple sub-information to be written;

[0013] Determine the pulse light phase modulation parameters and the pulse light amplitude control parameters corresponding to each of the multiple sub-informations to be written;

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

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

[0016] The second set of write parameters is determined as follows:

[0017] The maximum number of parallel operations is determined based on the initial laser energy, the preset mapping relationship, and the attributes of the writing module.

[0018] Based on the information to be written, the preset encoding length, and the maximum number of parallel operations, a second writing parameter sequence is determined, 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.

[0019] The second write parameter set is obtained based on the maximum number of parallel operations and the second write parameter sequence.

[0020] According to embodiments of this disclosure, a first write parameter sequence is determined based on the information to be written, a preset encoding length, and a maximum number of parallel operations, including:

[0021] Based on the preset encoding length, the information to be written is split into multiple sub-information to be written;

[0022] Based on the maximum number of parallel operations, multiple sub-information items to be written are arranged to obtain at least one sub-information dot matrix to be written.

[0023] For each sub-information dot matrix to be written, based on a preset mapping relationship, each sub-information to be written is mapped to obtain a light intensity distribution dot matrix. The light intensity distribution dot matrix includes light intensities corresponding to each of the multiple sub-informations to be written, and different light intensities correspond to different fluorescence defects.

[0024] The light intensity distribution matrix is ​​input into the parameter determination model to obtain the first writing parameter corresponding to the sub-information matrix to be written;

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

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

[0027] The processor is used to determine the target write parameter group and the target movement parameter corresponding to the information write mode, and to send the target write parameter group to the corresponding information write module, and to send the target movement parameter to the base.

[0028] A laser is used to generate a laser beam with an initial intensity to process solid materials.

[0029] The information writing module is used to modulate the laser based on the target writing parameter set to obtain a modulated laser that matches the information to be written.

[0030] An optical transmission module is used to transmit modulated laser light into a solid material so that the modulated laser light generates multiple storage points on the solid material that match the information to be written. Each of the multiple storage points has a fluorescence defect, and the multiple fluorescence defects match the information to be written.

[0031] A base is used to hold solid materials and to move the solid materials relative to the modulated laser based on target movement parameters.

[0032] According to embodiments of this 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 information writing module includes: a laser modulation module and an adaptive optics element;

[0033] The laser modulation module is used to modulate the initial laser intensity based on the pulse light amplitude control parameters to obtain a first modulated laser with a target laser intensity. The target laser intensity corresponds to the sub-information to be written, which is obtained by splitting the information to be written based on a preset encoding length.

[0034] A first adaptive optics element is used to modulate the phase of a first modulated laser based on pulse phase modulation parameters in order to control the focusing of the first modulated laser to obtain a second modulated laser.

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

[0036] The first pulse width processor has its output connected to the input of the optical modulator. The input is used to receive laser light. The first pulse width processor is used to broaden the pulse width of the laser light to reduce the peak power of the laser light and obtain the first processed laser light.

[0037] The driver is used to receive pulse light amplitude control parameters and transmit a sinusoidal signal with an amplitude equal to the pulse light amplitude control parameters to the optical modulator.

[0038] An optical modulator is used to modulate the initial laser intensity based on a sinusoidal signal to obtain a second processed laser with the target laser intensity.

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

[0040] According to embodiments of this 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.

[0041] Specifically, when the information writing mode is determined to be a single-point writing mode, the base is used for:

[0042] It is used to place solid material and receive a first movement parameter sent by a processor, and is also used to adjust the motion mode of the base 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.

[0043] According to embodiments of this disclosure, the information writing mode includes a parallel writing mode; when the information writing mode is determined to be a parallel writing mode, the information writing module includes: an adaptive optics element;

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

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

[0046] According to the method for high-speed, high-density information writing based on fluorescence defects in solid materials disclosed herein, a target writing parameter set is used to write the information to be written into the solid material, and a target movement parameter set is used to move the solid material synchronously 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 set, multiple storage points matching the information to be written are generated on the solid material, and each of the multiple storage points has fluorescence defects. The multiple fluorescence defects are matched with the information to be written, which enables synchronous automatic switching of storage points during the writing process of the information to be written. This at least partially solves the technical problem of low writing rate in related technologies and achieves the technical effect of improving the information writing rate. Attached Figure Description

[0047] The foregoing contents, as well as other objects, features, and advantages of this disclosure, will become clearer from the following description of embodiments with reference to the accompanying drawings, in which:

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

[0049] Figure 2 schematically illustrates a storage point diagram according to an embodiment of the present disclosure;

[0050] Figure 3 schematically illustrates a write arc region according to an embodiment of the present disclosure;

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

[0052] Figure 5 schematically illustrates a system for high-speed, high-density information writing based on fluorescence defects in solid materials according to a first embodiment of this disclosure;

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

[0054] Figure 7 schematically illustrates a system for high-speed, high-density information writing based on fluorescence defects in solid materials according to a second embodiment of this disclosure; and

[0055] Figure 8 schematically illustrates a system for high-speed, high-density information writing based on fluorescence defects in solid materials according to a third embodiment of this disclosure. Detailed Implementation

[0056] The embodiments of the present disclosure will now 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 disclosure. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the embodiments of the present disclosure for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts of the present disclosure.

[0057] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

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

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

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

[0061] However, current femtosecond laser writing technology is still in the experimental stage, and some of its outstanding advantages have not been fully demonstrated. High storage density is a major feature of this system, but to fully realize this advantage, a matching write speed is urgently needed to achieve high-throughput information transmission and fully leverage its high storage density. However, currently there is no method or system to solve this problem; the current write speed is on the order of 100Hz, far from meeting practical requirements. There is an urgent need to improve the write speed to accelerate the widespread application of this system.

[0062] The embodiments of this disclosure provide a method for high-speed, high-density information writing based on fluorescence defects in a solid material, comprising: determining a target writing parameter set corresponding to an information writing mode and a target movement parameter corresponding to the information writing mode, wherein the target writing parameter set is used to write the information to be written into the solid material, and the target movement parameter is used to move the solid material synchronously during the process of writing the information to be written into the solid material; and generating multiple storage points on the solid material that match the information to be written based on the target writing parameter set and the target movement parameter, wherein the multiple storage points each have fluorescence defects, and the multiple fluorescence defects match the information to be written.

[0063] Figure 1 schematically illustrates a flowchart of a method for high-speed, high-density information writing based on fluorescence defects in solid materials according to an embodiment of the present disclosure.

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

[0065] In operation S110, a target writing parameter group and a target movement parameter corresponding to the information writing mode are determined. 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 move the solid material synchronously 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, multiple storage points matching the information to be written are generated on the solid material. Each of the multiple storage points has a fluorescence defect, and the multiple fluorescence defects match the information to be written.

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

[0068] According to embodiments of this disclosure, different writing modes can correspond to different target writing parameter sets and different target movement parameters. According to embodiments of this disclosure, the specific material of the solid material is not limited and can be diamond, silicon carbide, gallium nitride, aluminum nitride, zinc oxide, silicon dioxide, and lithium niobate, etc.

[0069] According to embodiments of this disclosure, the information to be written can be a digital encoding group. The encoding type of the digital encoding group is not limited; it can be any encoding type such as binary encoding, octal encoding, or decimal encoding. The number of bits in the digital encoding group is not limited; it can be any number of bits. The information to be written can be obtained by digitally encoding the target information to be stored. The information format of the target information is not limited; it can be text information, image information, etc.

[0070] According to embodiments of this disclosure, a preset writing area can be determined in a solid material, and multiple storage points can be generated by processing within the preset writing area. The preset writing area is either a region in the solid material where no information has been written or a region specified by the user for writing.

[0071] According to embodiments of this disclosure, different fluorescence defects in a storage point indicate different sub-information to be written stored at that storage point. By stimulating the fluorescence defect, it can be determined whether the storage point stores sub-information to be written.

[0072] According to embodiments of this disclosure, the fluorescence defect comprises four dimensions: three spatial dimensions plus one brightness dimension. The fluorescence defect is generated through the interaction between a laser and a solid material. Information is written by adjusting the laser energy and the writing position. The defect fluorescence is then excited by an excitation light or a wide-field laser source, thereby enabling the readout of the written signal.

[0073] According to the method for high-speed, high-density information writing based on fluorescence defects in solid materials disclosed herein, since the target writing parameter set is used to write the information to be written into the solid material, and the target movement parameter set is used to move the solid material synchronously during the process of writing the information to be written into the solid material, multiple storage points matching the information to be written are generated on the solid material through the target writing parameters and the target movement parameter set, and each of the multiple storage points has fluorescence defects. The multiple fluorescence defects are matched with the information to be written, which enables the storage points to be automatically switched synchronously during the writing process of the information to be written, thereby at least partially solving the technical problem of low writing rate in related technologies and achieving the technical effect of improving the information writing rate.

[0074] According to embodiments of this 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 the laser type and the preset pulse width of the laser output laser.

[0075] The first movement parameter is determined as follows: based on a preset writing arc area, a preset distance between adjacent points in multiple 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 radial movement speed; the laser type and 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 while the solid material rotates, the size of the generated storage point is within the target size range.

[0076] According to embodiments of this disclosure, the single-point write mode can be used to write information to only one storage point at a time.

[0077] According to embodiments of this disclosure, the first movement parameter can be a parameter corresponding to the motion information of the solid material in single-point writing mode, and may include rotation mode parameters and rotation speed parameters.

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

[0079] According to embodiments of this disclosure, the target size range of the storage points is determined by the readout system resolution and the stationary point size. The stationary point size is the size of the storage point generated under the condition that 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 embodiments of this disclosure, for example, if the readout system resolution is 500nm and the stationary bit size is 100nm, when there is significant trailing at the write point, such as extending from 100nm to 500nm, the spacing between adjacent bits becomes too small, or even overlaps. This causes crosstalk between adjacent bits, leading to a decrease in subsequent readout fidelity. If, to ensure high readout fidelity, the spacing between adjacent bits needs to be increased, this will reduce the storage density. In another scenario, the readout system resolution is higher than or close to the storage bit size, for example, the storage bit size is 100nm. 2 The resolution is 10nm. At this time, the tail caused by rotation is more likely to affect readout fidelity and storage density. The tolerance size for the tail needs to be based on the bit size. For example, while ensuring storage density, the size increase caused by the tail needs to be limited to 10% or less of the storage bit size.

[0081] According to embodiments of this disclosure, writing to a solid material while it is rotating may produce a trailing effect, resulting in a smaller size of the storage point. However, by using a pulsed laser type and an output pulse width 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 storage points generated when the solid material is stationary. This achieves both high write density and fast writing.

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

[0083] According to embodiments of this disclosure, the preset writing arc area can be a preset writing area on a solid material, specifically including: writing area, writing direction, writing arc, arc radius, etc.

[0084] According to embodiments of this disclosure, the preset laser parameter frequency can be the preset initial frequency of the laser emitted by the laser. In some embodiments, to improve the write rate, the maximum laser frequency of the laser, such as 80MHz, can typically be used.

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

[0086] Among them, f max The preset laser frequency is omega, the rotation speed parameter is r, the radius of the preset writing arc region is distance. adj The preset distance between adjacent points in multiple storage locations.

[0087] According to embodiments of this disclosure, in some embodiments, f max =80MHz, diameter adj =500nm, r=8mm, omega=5KHz can be determined by formula (1). In this embodiment, the pulse width of a single laser is within 200fs, the displacement of the base is 50pm, and the size of a single storage site is at the 100nm level. Therefore, the rotational movement of the base during writing can be ignored, and the rotation of the base will not affect the writing effect.

[0088] According to embodiments of this disclosure, the radial movement speed can be determined by the distance between the pre-written arc region and adjacent sites via a preset laser emission frequency, or it can be preset.

[0089] According to embodiments of this disclosure, a first movement parameter enables the solid material to rotate uniformly while simultaneously writing multiple pieces of information to be written. Specifically, the distance between adjacent storage points is controlled by adjusting the rotation speed, ensuring that the rotation speed matches the writing frequency and the interval between adjacent storage points. This allows for rapid switching of writing points while rotating, enabling fast writing of multiple pieces of information to be written. This avoids the acceleration and deceleration jerks caused by translating the solid material to switch points, which can lead to inaccurate writing positions of fluorescence defects and system instability. Furthermore, it achieves fast and stable writing of the information to be written. Figure 2 schematically illustrates a storage point diagram according to an embodiment of this disclosure.

[0090] As shown in Figure 2, the method for high-speed, high-density information writing using fluorescent defects in solid materials according to this embodiment demonstrates that controlling the rotation speed and pulse width of the laser pulse can achieve a single storage point size at the 100nm level. Typically, a 100nm writing size can only be achieved during static writing, i.e., when the solid material does not move. However, in this embodiment, by controlling the rotation speed of the solid material and the laser type, the displacement of the solid material during the writing time is only on the order of microseconds (pm). This ensures that the size of a single storage point does not change due to the introduction of the rotation mode during writing, thus maintaining high storage density while increasing the writing rate.

[0091] Figure 3 schematically illustrates a write arc region according to an embodiment of the present disclosure.

[0092] As shown in Figure 3, the radius of the preset writing arc region can vary in different writing areas. When the solid material rotates and moves, it can enter the writing areas of different radii in the preset writing arc region through synchronous radial movement, thus forming the preset writing arc region schematic diagram shown in Figure 3.

[0093] According to embodiments of this 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 writing parameter group is a first writing parameter group; the first writing parameter group includes pulse light amplitude control parameters and pulse light phase modulation parameters.

[0094] The first writing parameter group is determined as follows: based on the preset encoding length, the information to be written is divided 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 pulse light phase modulation parameters corresponding to each of the multiple sub-information to be written, the first writing parameter group is determined.

[0095] According to embodiments of this disclosure, the first set of written parameters may include pulse phase modulation parameters of the adaptive optics element and pulse amplitude control parameters of the laser modulation module.

[0096] According to embodiments of this disclosure, the pulsed light phase modulation parameters can be obtained by combining the plasma luminescence intensity of the pulsed laser interacting with the solid material with a gradient descent algorithm.

[0097] According to embodiments of this disclosure, the sub-information to be written can be a digital code with N bits, where N is a positive integer; the preset code length can be used to characterize the number of bits of digital code that a storage point can store.

[0098] According to embodiments of this disclosure, the pulse light amplitude control parameters can be determined based on a preset mapping relationship.

[0099] According to embodiments of this disclosure, the preset mapping relationship may include the mapping relationship between fluorescence intensity and sub-information to be written. For example, in some embodiments, a laser acts on the storage point to generate a fluorescence defect. When the fluorescence intensity of the fluorescence defect is 0Hz when excited by the readout light, the sub-information to be written is digitally encoded as 0; when the fluorescence intensity is 5MHz, the sub-information to be written is digitally encoded as 1.

[0100] According to embodiments of this disclosure, for example, the pulse light amplitude control parameters are 0V, 0.5V, 3V, and 5V, and their corresponding fluorescence intensities are 0MHz, 1-2MHz, 3-4MHz, and 4-5MHz, respectively. The pulse light amplitude control parameters can be determined by a preset mapping relationship when writing different sub-information to be written.

[0101] According to an embodiment of this disclosure, specifically, for example: the information to be written is 00011011, and the preset encoding length is 2, that is, the sub-information to be written is 00, 01, 10, 11. Through a preset correspondence, the fluorescence intensity corresponding to the above sub-information to be written is respectively: 0MHz, 1-2MHz, 3-4MHz, 4-5MHz, thereby obtaining the pulse light amplitude control parameters as 0V, 0.5V, 3V, 5V.

[0102] According to embodiments of this disclosure, the pulsed light phase modulation parameters can modulate the phase of the laser, thereby avoiding phase distortion and enhancing the light focusing effect to a certain extent. This results in more accurate fluorescence defects generated when the laser processes the storage points. The pulsed light amplitude control parameters control the input voltage of the laser modulation module, enabling the laser modulation module to modulate the laser intensity to the intensity corresponding to the sub-information to be written, thus generating accurate fluorescence defects and improving the fidelity of information writing.

[0103] According to embodiments of this disclosure, the target writing parameter group may further include a preset laser frequency and a laser type. In single-point writing mode, the laser type can be a pulsed laser with an output laser pulse width of a preset pulse width. Since the laser emitted by the pulsed laser is a pulsed laser with a short pulse width, even if the solid material is rotating at high speed, the storage points generated by the pulsed laser hitting the solid material will not have a trailing effect, resulting in a smaller size of each storage point and achieving a higher storage density. Furthermore, 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 one pulsed laser writing is completed and before the next pulsed laser is emitted, the solid material can be controlled to quickly rotate to the next storage point so that the next pulsed laser can write data at that storage point. This ensures that the fluorescence defects generated at each storage point are irradiated by only one laser, thus achieving single-pulse writing. This ensures high-density storage while also enabling rapid information writing. According to embodiments of this disclosure, the information writing mode includes a parallel writing mode; when the information writing mode is determined to be a parallel writing mode, the target writing parameter group is a second writing parameter group; the second writing parameter group includes: the maximum number of parallel operations and the second writing parameter sequence.

[0104] The second writing parameter set is determined as follows: the maximum number of parallel operations is determined based on the initial laser energy, the preset mapping relationship, and the writing module attributes; the second writing parameter sequence is determined based on the information to be written, the preset encoding length, and the maximum number of parallel operations, wherein the second writing parameter sequence includes at least one second writing parameter, which is used to write the information to be written into the solid material in parallel; and the second writing parameter set is obtained based on the maximum number of parallel operations and the second writing parameter sequence.

[0105] According to embodiments of this disclosure, the parallel write mode can be a mode capable of writing information to multiple storage points simultaneously.

[0106] According to embodiments of this disclosure, the initial laser energy can be the laser energy output by the laser.

[0107] According to embodiments of this disclosure, when the information writing mode is determined to be a parallel writing mode, the target movement parameter can be a second movement parameter. The second movement parameter may include rotation mode parameters and rotation speed parameters, or translation mode parameters and translation parameters, depending on the requirements. The translation mode parameter can indicate that the solid material performs translational motion during movement, and the translation parameters can indicate the direction and speed of movement of the solid material during translational motion.

[0108] According to embodiments of this disclosure, the written module attributes can be attributes of the module itself in the system, such as: the objective field of view of the objective lens and the light field uniformity limit value of the adaptive optics element in the optical transmission module.

[0109] According to embodiments of this disclosure, the maximum parallelism is used to characterize the number of storage points that can simultaneously write information during a single write operation, or it can be the number of laser points in the laser array during a single write operation.

[0110] According to embodiments of this disclosure, the second write parameter sequence may include at least one second write parameter, the write order of each of the at least one second write parameter, and the write time point of each of the at least one second write parameter, etc.

[0111] According to embodiments of this disclosure, when the number of multiple sub-information to be written is less than or equal to the maximum parallel number, multiple sub-information to be written can be written to the solid material in parallel at one time using a second write parameter; when the number of multiple sub-information to be written is greater than the maximum parallel number, a portion of the sub-information to be written can be written to the solid material in parallel using a second write parameter, and the remaining sub-information to be written can be written to the solid material in parallel using the remaining second write parameters in the second write parameter sequence.

[0112] According to embodiments of this disclosure, fluorescent defects are generated in a solid material by processing with lasers of different energies, thereby obtaining storage sites. Different densities of fluorescent defects correspond to different sub-information to be written. The writing of different sub-information to be written is achieved through the correspondence between laser energy and writing laser intensity and a preset mapping relationship.

[0113] According to embodiments of this disclosure, when writing information, the information writing mode is first determined. If the information writing mode is parallel writing mode, the maximum number of parallel writes to the solid material each time is determined based on the initial laser intensity, preset mapping relationship, and writing module attributes. The second writing parameter sequence is then determined using the maximum number of parallel writes and the information to be written. Parallel writing of the information to be written is then achieved 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, since each site is only irradiated by a single pulse, the large storage capacity of the system is perfectly inherited, thus at least partially solving the problem of slow optical storage writing speed in related technologies. This achieves the technical effect of writing information at a higher speed while meeting high density requirements.

[0114] According to embodiments of this disclosure, by employing a second movement parameter including rotation mode parameters and rotation speed parameters to rotate the solid material, it is possible to achieve rapid and smooth switching of storage points while writing information in parallel. This overcomes the step frequency limitation of translational displacement stages and avoids the acceleration and deceleration jerks caused by translational methods, which can lead to inaccurate fluorescence defects and system instability, thus achieving faster information writing.

[0115] According to embodiments of this disclosure, a first write parameter sequence is determined based on the information to be written, a preset encoding length, and a maximum number of parallel operations, including the following operations.

[0116] Based on a preset encoding length, the information to be written is divided into multiple sub-information to be written; based on the maximum parallelism, the multiple sub-information to be written is arranged to obtain at least one sub-information dot matrix; for each sub-information dot matrix, based on a preset mapping relationship, each 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 fluorescence defects; the light intensity distribution dot matrix is ​​input into a parameter determination model to obtain the first writing parameters corresponding to the sub-information dot matrix; the first writing parameters corresponding to each of the at least one writing dot matrix are sorted to obtain a first writing parameter sequence.

[0117] According to embodiments of this disclosure, the matrix dimension of the sub-information matrix to be written can be determined based on the maximum parallelism, and it can be determined whether the number of multiple sub-information items to be written is greater than the maximum parallelism. If it is greater than the maximum parallelism, the multiple sub-information items to be written can be grouped to obtain multiple sub-information groups to be written; if it is less than or equal to the maximum parallelism, a single sub-information group to be written can be obtained.

[0118] According to embodiments of this disclosure, each group of sub-information to be written includes a maximum number of parallel sub-information to be written. For each group of sub-information to be written, the N sub-information to be written are arranged into a matrix according to their respective target order. The target order can be determined by the position of the sub-information to be written in the information to be written. For example, if the information to be written is 101011, the sub-information to be written 1 is 10, the sub-information to be written 2 is 10, and the sub-information to be written 3 is 11, then the target order of the sub-information to be written 1, the sub-information to be written 2, and the sub-information to be written 3 is 1, 2, and 3, respectively.

[0119] According to embodiments of this disclosure, each piece of sub-information to be written in the sub-information dot matrix is ​​stored in a storage point. When writing, the sub-information to be written can be written according to the target order of each of the multiple pieces of sub-information to be written, so that the sub-information to be written in adjacent orders is also in adjacent points, so as to facilitate subsequent reading.

[0120] According to embodiments of this disclosure, the parameter determination model can be obtained from an aberration polynomial or a wavefront correction polynomial.

[0121] According to embodiments of this disclosure, a sub-information dot matrix to be written can correspond to a first writing parameter, that is, a laser can be modulated into a laser dot matrix that matches the sub-information dot matrix to be written through the first writing parameter, thereby realizing the writing of the sub-information dot matrix to be written into a solid material.

[0122] According to embodiments of this disclosure, by splitting the information to be written and predicting the sub-information matrix to be written after writing multiple sub-information to be written into a solid material, and determining the second writing parameters through the sub-information matrix and parameter determination model, the parallel writing of multiple sub-information to be written can be accurately achieved.

[0123] According to embodiments of this disclosure, since multiple sub-information to be written has its own target order, at least one write dot matrix also has its own target order. By the target order of at least one write dot matrix, the target order of the first write parameters corresponding to each of the at least one write dot matrix is ​​determined, thereby sorting the first write parameters to obtain a first write parameter sequence.

[0124] According to embodiments of this disclosure, each piece of 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. Thus, the accurate first writing parameters can be obtained by reverse deduction through the parameter determination model.

[0125] According to embodiments of this disclosure, the writing order of each first write parameter can be determined by the first write parameter sequence, thereby facilitating the writing of each sub-information to be written.

[0126] Figure 4 schematically illustrates a first writing parameter and a light intensity distribution matrix according to an embodiment of the present disclosure.

[0127] As shown in Figure 4, 410 is the image identifier of the first written parameter, which is represented by a phase map, and 420 is the light intensity point distribution matrix.

[0128] According to embodiments of this disclosure, determining the maximum number of parallel operations based on the initial laser energy, a preset mapping relationship, and the attributes of the writing module may include: determining the maximum light intensity in the light intensity distribution array based on the preset mapping relationship; determining a first parallel operation range based on the initial laser intensity and the maximum light intensity; determining a second parallel operation range based on the objective lens field of view and a preset distance between adjacent points in the multiple storage points; determining a third parallel operation range based on the light field uniformity limit value; and determining the maximum number of parallel operations based on the first, second, and third parallel operation ranges.

[0129] According to embodiments of this disclosure, the maximum fluorescence intensity in multiple mapping relationships can be determined by a preset mapping relationship, such as: fluorescence intensities of 0MHz, 1-2MHz, 3-4MHz, and 4-5MHz, and the sub-information to be written corresponding to the above fluorescence intensities are 00, 01, 10, and 11, respectively, that is, the maximum light intensity is 5MHz, and the maximum laser energy of a single point light is determined by the correspondence between laser energy and laser intensity.

[0130] According to embodiments of this disclosure, the first parallel number range is determined by employing the following formula (2). N p1 ≤E input / E input (2)

[0131] Among them, E input For input initial laser energy, E Single The maximum single-spot optical pulse laser energy, N p1 This is the first parallel number.

[0132] According to embodiments of this disclosure, in some embodiments, in order to successfully generate fluorescence defects and obtain the highest encoded brightness, the initial laser energy can be used as the highest energy of the laser, and the maximum laser energy of a single point can be determined by the fluorescence intensity of a point in the light intensity distribution array reaching the maximum light intensity, thereby improving the accuracy of subsequent reading.

[0133] According to embodiments of this disclosure, the size of the objective lens field of view limits the size of the light intensity distribution lattice, and consequently also limits the maximum number of parallel operations.

[0134] According to the embodiments of this disclosure, the preset distance between adjacent points is not limited, but can be limited according to the actual situation. Specifically, it can be 500nm, which is determined by the optical diffraction limit of the readout light and is about 500nm in the lateral space.

[0135] According to embodiments of this disclosure, the light field uniformity limit value can be determined based on the inherent limitations of the adaptive optics element, and the light field uniformity limit value is related to the module performance of the adaptive optics element.

[0136] According to embodiments of this disclosure, in some embodiments, the initial laser intensity E input The maximum light intensity is 100 μJ, and the maximum light intensity is E. Single The value is 0.1uJ, thus the range of the first parallel number is N. P1 ≤1000; the objective lens field of view is 10×10um. Considering that light will be distorted beyond the field of view, affecting the writing fidelity, the range of the second parallel number is N. P2 ≤200×200; The light field uniformity limit for adaptive optics elements requires that the light field uniformity be >90% when N P3 When the number of parallel lines is ≤380, meaning the light field uniformity is required to be >90%, the range of the third parallel line number can be N. P ≤380, by taking the above three ranges of parallel numbers, the maximum number of parallel numbers is determined to be 380.

[0137] According to embodiments of this disclosure, by considering factors such as the attributes of the writing module and the intensity of a single laser point when determining the maximum number of parallel writes, it is possible to achieve parallel writing while also ensuring better write fidelity.

[0138] Figure 5 schematically illustrates a system for high-speed, high-density information writing based on fluorescence defects in solid materials according to a first embodiment of this disclosure.

[0139] As shown in Figure 5, 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 optics element. The adaptive optics element includes at least one, such as a first adaptive optics element 541 and a second adaptive optics element 542 in this embodiment.

[0140] The processor 510 is used to determine the target write parameter group and the target movement parameter corresponding to the information write mode, and to send the target write parameter group to the corresponding information write module, and to send the target movement parameter to the base 560.

[0141] Laser 520 is used to generate a laser with an intensity equal to the initial laser intensity in order to process solid material 550.

[0142] The information writing module is used to modulate the laser based on the target writing parameter set to obtain a modulated laser that matches the information to be written.

[0143] An optical transmission module is used to transmit modulated laser light into a solid material 550 to generate multiple storage points on the solid material 550 that match the information to be written, wherein the multiple storage points have fluorescence defects and the multiple fluorescence defects match the information to be written.

[0144] The base 560 is used to place the solid material 550 and to move the solid material 550 relative to the modulated laser based on the target movement parameters.

[0145] The laser modulation module is used to modulate the initial laser intensity based on the pulse light amplitude control parameters to obtain a first modulated laser with a target laser intensity. The target laser intensity corresponds to the sub-information to be written, which is obtained by splitting the information to be written based on a preset encoding length.

[0146] An adaptive optics element is used to modulate the phase of a first modulated laser based on pulsed light phase modulation parameters in order to control the focusing of the first modulated laser to obtain a second modulated laser.

[0147] According to embodiments of this 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 polarizing beam splitter, a second half-wave plate, multiple mirrors, multiple lenses, an objective lens, and a dichroic mirror.

[0148] According to embodiments of this disclosure, the laser modulation module can control the laser intensity at a frequency on the order of 100MHz by changing the input voltage intensity, allowing the laser intensity to continuously vary between 0 and its maximum value. The laser modulation module can be used as a convolution function in the optical path, thereby selectively reducing or turning off certain pulsed lasers based on the laser output from the laser 520. According to embodiments of this disclosure, the first half-wave plate, the polarizing beam splitter, and the second half-wave plate can be combined to adjust the intensity and polarization of the laser. In some embodiments, the representation of digital codes can be achieved by combining the polarization of light with fluorescence brightness; that is, the preset mapping relationship can also include the correspondence between the polarization of light and the digital code.

[0149] According to embodiments of this disclosure, a reflector can be used to change the propagation direction of a laser.

[0150] According to embodiments of this disclosure, both the first adaptive optics element 541 and the second adaptive optics element 542 can be deformable mirrors or spatial light modulators.

[0151] According to embodiments of this disclosure, when the information writing mode is determined to be a single-point writing mode, the laser type that can be used is a pulsed laser, based on the laser type and the preset pulse width of the laser output laser. According to the preset pulse limit value, a laser with a pulse width of output pulse laser that is smaller than the preset pulse width can be selected, such as a femtosecond laser, a picosecond laser, an attosecond laser, or other lasers with shorter pulse widths. The wavelength of the laser 520 is not limited and can be 520nm, etc. Since the time is short enough, fluorescence defects can be generated in solid materials.

[0152] According to embodiments of this disclosure, the laser 520 can be a pulsed laser 520, therefore, a single output laser can also be referred to as a pulsed laser.

[0153] According to embodiments of this disclosure, a lens can be used to ensure the normal operation of the system. For example, a lens located between a reflector and a first adaptive optics element 541 can make the laser output from the first adaptive optics element 541 approximately equivalent to the phase of the adaptive optics element added to the Fourier surface of the objective lens.

[0154] According to embodiments of this disclosure, the objective lens can reduce the write size of a single laser dot, increase storage density, and improve write fidelity.

[0155] According to embodiments of this disclosure, the pulsed light phase modulation parameters may include phase modulation sub-parameters for each of at least one adaptive optics element.

[0156] According to embodiments of this disclosure, in single-point write mode, the adaptive optics element receives pulse light phase modulation parameters sent by the controller, and modulates the first modulated light using the pulse light phase modulation parameters, thereby correcting the aberration of the write light.

[0157] In a fundamentally disclosed embodiment, the laser modulation module includes: an optical modulator, a driver, a first pulse width processor, and a second pulse width processor;

[0158] The first pulse width processor has its output connected to the input of the optical modulator. The input is used to receive laser light. The first pulse width processor is used to broaden the pulse width of the laser light to reduce the peak power of the laser light and obtain the first processed laser light.

[0159] The driver is used to receive pulse light amplitude control parameters and transmit a sinusoidal signal with an amplitude equal to the pulse light amplitude control parameters to the optical modulator.

[0160] An optical modulator is used to modulate the initial laser intensity based on a sinusoidal signal to obtain a second processed laser with the target laser intensity.

[0161] The second pulse width processor is used to receive the second processed laser and to compress the pulse width of the second processed laser to obtain the first modulated laser.

[0162] According to embodiments of this disclosure, the implementation of the driver is not limited and can be any device capable of driving an optical modulator, such as an arbitrary waveform generator (AWG).

[0163] According to the embodiments of this disclosure, the implementation of the optical modulator is not limited, and it can be any device capable of modulating the laser intensity, such as an acousto-optic modulator (AOM).

[0164] According to embodiments of this disclosure, the implementation of the first pulse width processor and the second pulse width processor is not limited, and they can be implemented using chirped pairs.

[0165] According to embodiments of this disclosure, a first pulse width processor is placed at the input end of the optical modulator, and a second pulse width processor is placed at the output end of the optical modulator. The first pulse width processor can broaden the pulsed laser emitted by the laser to the nanosecond level to reduce its peak power, so that the system can controllably adjust the pulse intensity without damaging the optical modulator components. After passing through the optical modulator, the second pulse width processor compresses the pulse width back to the original level of the pulsed laser without affecting the peak power.

[0166] According to embodiments of this disclosure, the driver can output a sinusoidal signal with a fixed frequency but adjustable amplitude, and send this sinusoidal signal to an optical modulator. Since the power of the selected diffraction spot by the optical modulator depends on the amplitude of the input sinusoidal signal, the intensity of a single pulse laser can be controlled on the order of hundreds of MHz.

[0167] According to embodiments of this disclosure, in some embodiments, the information to be written is 00100111. Based on the preset encoding bit length, 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 one storage point. Based on the first writing parameter, the pulse light amplitude control parameters of the laser modulation module for the above-mentioned sub-information to be written can be determined to be: 0V, 0.5V, 3V, 5V.

[0168] According to embodiments of this disclosure, specifically, the laser 520 can emit at a frequency of f max The frequency output light pulse sequence is controlled, the base rotates stably at the target speed of 560°, the objective lens is focused on the preset writing arc area, and the laser modulation module performs... 0V voltage input duration 0.5V voltage input duration, 3V voltage input duration A 5V voltage input for a duration enables the writing of corresponding sub-information 00, 10, 01, and 11 at adjacent storage sites 0, 1, 2, and 3.

[0169] Figure 6 schematically illustrates a modulation waveform diagram of a laser modulation module 710 modulating a laser according to an embodiment of the present disclosure.

[0170] As shown in Figure 6, 610 is the waveform of the pulsed laser, 620 is the waveform of the output after modulation by the optical modulator, and 630 is the waveform of the output of the second pulse width processor, which is also the waveform of the pulsed laser input to the solid sample.

[0171] In the fundamentally disclosed embodiment, when the information writing mode is determined to be a single-point writing mode, the target movement parameter is a first movement parameter;

[0172] Specifically, when the information writing mode is determined to be a single-point writing mode, the base 560 is used to: place solid materials, receive first movement parameters sent by the processor, adjust the movement mode of the base 560 to a rotation mode based on the rotation mode parameters included in the first movement parameters, and perform rotation operation based on the rotation speed parameters.

[0173] According to embodiments of this disclosure, the base can be considered as a rotary table in single-point write mode.

[0174] According to embodiments of this disclosure, in some embodiments, for storing a large amount of information, an arc cannot store all the information to be written. Therefore, in application, the writing area can slowly move radially while the base rotates.

[0175] According to embodiments of this disclosure, a solid material is rotated by a rotating base, enabling rapid switching of the writing position. The parameters of the laser can be controlled to output the maximum laser frequency. Thus, the matching between the base rotation speed, the pulse amplitude control parameters configured in the laser modulation module, and the maximum laser repetition frequency enables high-density, high-speed writing.

[0176] Figure 7 schematically illustrates a system for high-speed, high-density information writing based on fluorescence defects in solid materials according to a second embodiment of the present disclosure.

[0177] As shown in Figure 7, 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 a parallel writing mode, the information writing module includes an adaptive optics element. The adaptive optics element includes at least one, for example: a first adaptive optics element 731 and a second adaptive optics element 732 in this embodiment.

[0178] The processor 710 is used to determine the target write parameter group and the target movement parameter corresponding to the information write mode, and to send the target write parameter group to the corresponding information write module, and to send the target movement parameter to the base.

[0179] Laser 720 is used to generate a laser with an initial laser intensity to process solid materials.

[0180] The information writing module is used to modulate the laser based on the target writing parameter set to obtain a modulated laser that matches the information to be written.

[0181] The optical transmission module is used to transmit modulated laser light into a solid material so that the modulated laser light can process multiple storage points in the solid material, thereby generating fluorescent defects at the multiple storage points that correspond to the information to be written.

[0182] The base 750 is used to place solid materials and to move the solid materials relative to the modulated laser based on the target movement parameters.

[0183] An adaptive optics element is used to modulate the phase of a laser based on each of the first write parameters in the second write parameter sequence to obtain a laser dot array corresponding to the second write parameters.

[0184] When the information writing mode is determined to be parallel writing mode, the base 750 is specifically used to place solid materials, and is also used to receive second movement parameters sent by the processor 710, and to perform rotation or translation operations based on the second movement parameters.

[0185] According to embodiments of this 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 polarizing beam splitter, a second half-wave plate, multiple mirrors, multiple lenses, and a dichroic mirror.

[0186] According to embodiments of this disclosure, the second writing parameters may include first element parameters for the first adaptive optics element 731 and second element parameters for the second adaptive optics element 732. The first adaptive optics element is used to perform first phase modulation on the laser to obtain an initial laser dot array, and the second adaptive optics element 732 is used to perform second phase modulation on the initial laser dot array to obtain a laser dot array. The first adaptive optics element 731 can be coarsely tuned, while the second adaptive optics element 732 is finely tuned. Thus, through two phase modulations, a laser dot array capable of generating accurate fluorescence defects is obtained.

[0187] According to embodiments of this disclosure, both the first adaptive optics element and the second adaptive optics element 732 can be deformable mirrors or spatial light modulators.

[0188] According to embodiments of this disclosure, in parallel writing mode, the type of laser 720 is not limited and can be a femtosecond laser 720, a conventional laser 720, etc., and the wavelength of laser 720 is not limited and can be 520nm, etc.

[0189] According to embodiments of this disclosure, the laser 720 can be a pulsed laser 720, therefore, the laser 720 that outputs a single laser beam can also be referred to as a pulsed laser.

[0190] According to embodiments of this disclosure, the processor can be a computer, a dedicated data processing chip, etc. According to embodiments of this disclosure, the processor is further configured 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 further configured to split the information to be written into a plurality of sub-information to be written based on a preset encoding length; determine pulse light phase modulation parameters and pulse light amplitude control parameters 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 parameters and pulse light phase modulation parameters corresponding to each of the plurality of sub-information to be written.

[0191] According to embodiments of this disclosure, the processor is further configured to determine the maximum number of parallel operations based on the initial laser energy, a preset mapping relationship, and the attributes of the writing module; determine a second writing parameter sequence based on the information to be written, a preset encoding length, and the maximum number of parallel operations, wherein the first writing parameter sequence includes at least one second writing parameter, the second writing parameter being used to write the information to be written into the solid material in parallel; and obtain a second writing parameter group based on the maximum number of parallel operations and the second writing parameter sequence.

[0192] According to embodiments of this disclosure, the processor is further configured to: divide the information to be written into multiple sub-information to be written based on a preset encoding length; arrange the multiple sub-information to be written based on the maximum parallelism to obtain at least one sub-information dot matrix; for each sub-information dot matrix, map each sub-information to be written included in the sub-information 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 fluorescence defects; input the light intensity distribution dot matrix into a parameter determination model to obtain first writing parameters corresponding to the sub-information dot matrix; and 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 embodiments of this disclosure, in parallel writing mode, the base 750 can be considered as a translation stage or a rotation stage.

[0193] According to embodiments of this disclosure, a laser dot matrix may include multiple laser dots. A first writing parameter can be used to modulate the laser into a laser dot matrix and control the energy of each laser dot in the laser dot matrix. After processing a solid material through the laser dot matrix, fluorescent defects can be generated at multiple storage sites of the solid material. When the fluorescent defects are irradiated by an optical signal, they can indicate the fluorescence intensity of the storage site, thereby determining the sub-information to be written stored at the storage site.

[0194] According to embodiments of this disclosure, the correspondence between laser energy and fluorescence intensity can be predetermined. In some embodiments, the energy P1 of any point in the laser array is preset to have a fluorescence intensity of 0 Hz / s, and its corresponding digital code can be 0. The energy P2 of any point in the laser array is preset to have a fluorescence intensity of 1 Hz / s, and its corresponding digital code can be 1, thereby realizing the mapping from preset single pulse energy to digital code.

[0195] According to embodiments of this disclosure, adaptive optical elements are used to generate laser dot arrays with controllable intensity. However, the adjustment range of adaptive optical elements is limited. When the number of parallel laser dot arrays is too large, the spot pattern of a single laser dot is distorted, causing the fluorescence intensity of the writing site to deviate from the ideal value, resulting in a decrease in information writing fidelity. Therefore, it is necessary to determine the maximum number of parallel writing points to ensure information writing fidelity.

[0196] According to embodiments of this disclosure, while modulating laser to form a laser dot array, the adaptive optics element can also achieve refractive index mismatch wavefront correction, reduce dot size, increase storage density, increase the defect density of write points, and improve write-read fidelity.

[0197] According to embodiments of this disclosure, in some embodiments, the information to be written is 00011011, the preset encoding length is 2, the sub-information to be written is 00, 01, 10, 11, the maximum parallel number is 2, and the first writing parameter sequence is determined to be ζ1, ζ2. The objective lens or base is moved so that the focus of the objective lens is focused on the preset writing area, thereby the adaptive optics element can write 00 and 01 to their respective storage points through ζ1, and can write 10 and 11 to their respective storage points through ζ2.

[0198] According to embodiments of this disclosure, the laser 720 can output a maximum pulse energy on the order of mJ, and the objective lens field of view is on the order of hundreds of micrometers. Therefore, the limitation on the maximum number of parallel operations often appears in the modulation capability of the adaptive optics element. When the uniformity of the light field is adjusted to 90% by a single adaptive optics element, the number of parallel operations is on the order of k. Thus, the number of parallel operations is limited by the adaptive optics element being on the order of k. The speed of the adaptive optics element is on the order of kHz. Therefore, the improvement factor of the parallel writing rate depends on the number of parallel operations, which can be k times that of single-point writing.

[0199] Figure 8 schematically illustrates a system for high-speed, high-density information writing based on fluorescence defects in solid materials according to a third embodiment of this disclosure.

[0200] As shown in Figure 8, the system includes: a processor 810, a writing laser 820, a position determination laser 870, an adaptive optics element, a laser modulation module 830, an optical transmission module, a phase modulation module 880, a photon detector 890, and a base 750. The adaptive optics element is at least one, such as a first adaptive optics element 841 and a second adaptive optics element 842.

[0201] According to embodiments of this disclosure, the optical transmission module is located between the writing laser 820 and the adaptive optics element, between the adaptive optics element and the base 860, between the determining 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 optics element, and includes: an objective lens, a first half-wave plate, a polarizing beam splitter, a second half-wave plate, multiple mirrors, multiple lenses, a first dichroic mirror, and a second dichroic mirror.

[0202] According to embodiments of this disclosure, the position determination laser 870 can be used as a laser for determining the writing area before writing is performed using the write laser 820.

[0203] According to embodiments of the present disclosure, the phase modulation module 880 can be used to perform phase modulation on the laser emitted by the position-determining laser 870.

[0204] According to embodiments of this disclosure, a photon detector 890 is used to detect the spatial distribution of the intensity of a light signal emitted by a solid material 850, so as to facilitate subsequent information reading.

[0205] According to embodiments of this disclosure, the adaptive optics element has different functions in different information writing modes. For example, in parallel writing mode, the adaptive optics 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 array corresponding to the first writing parameters. In single-point writing mode, the adaptive optics element is used to modulate the phase of the first modulated laser based on pulse light phase modulation parameters to control the focusing of the first modulated laser to obtain a second modulated laser.

[0206] According to embodiments of this disclosure, in the parallel write mode, the laser modulation module 830 may or may not be used.

[0207] According to embodiments of this disclosure, the writing laser 820 is the same as laser 520 and laser 620.

[0208] According to embodiments of this disclosure, the implementations in Figures 5, 7, and 8 characterize the propagation path of the laser, and the dashed lines represent data interaction between modules. The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those indicated in the figures. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0209] Those skilled in the art will understand that the features described in the various embodiments of this disclosure can be combined and / or combined in various ways, even if such combinations or combinations are not explicitly described in this disclosure. In particular, the features described in the various embodiments of this disclosure can be combined and / or combined in various ways without departing from the spirit and teachings of this disclosure. All such combinations and / or combinations fall within the scope of this disclosure.

[0210] The embodiments of this disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of this disclosure. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of this disclosure, and all such substitutions and modifications should fall within the scope of this disclosure.

Claims

1. A method for high-speed, high-density information writing based on fluorescent defects in solid materials, wherein, The method includes: Determine a target writing parameter group corresponding to the 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 move the solid material synchronously during the process of writing the information to be written into the solid material; Based on the target writing parameter set and the target movement parameter, multiple storage points matching the information to be written are generated on the solid material, wherein each of the multiple storage points has a fluorescence defect, and the multiple fluorescence defects match the information to be written.

2. The method according to claim 1, wherein, 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; the first writing parameter group includes the laser type and the preset pulse width of the laser output laser. The first movement parameter is determined in the following way: The first movement parameter is obtained based on the preset writing arc area, the preset distance between adjacent points in the plurality of storage points, and the preset laser frequency; The first movement parameter includes a rotation mode parameter and a rotation speed parameter. The rotation mode parameter indicates 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 radial movement speed. 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 while the solid material is rotating, the size of the generated storage point is within the target size range.

3. The method according to claim 2, wherein, The first writing parameter group also includes pulse light amplitude control parameters and pulse light phase modulation parameters; The first set of write parameters is determined in the following manner; Based on the preset encoding length, the information to be written is divided into multiple sub-information to be written; Determine the pulse light phase modulation parameters and the pulse light amplitude control parameters corresponding to each of the multiple sub-informations 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 multiple pieces of information to be written.

4. The method according to claim 1, wherein, The information writing mode includes a parallel writing mode; when the information writing mode is determined to be a parallel writing mode, the target writing parameter group is a second writing parameter group; the second writing parameter group includes: the maximum number of parallel operations and the second writing parameter sequence; The second set of write parameters is determined in the following way: The maximum number of parallel operations is determined based on the initial laser energy, the preset mapping relationship, and the attributes of the writing module. Based on the information to be written, the preset encoding length, and the maximum number of parallel operations, a second writing parameter sequence is determined, 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. The second write parameter group is obtained based on the maximum number of parallel operations and the second write parameter sequence.

5. The method according to claim 4, wherein, The step of determining the first write parameter sequence based on the information to be written, the preset encoding length, and the maximum number of parallel operations includes: Based on the preset encoding length, the information to be written is divided into multiple sub-information to be written; Based on the maximum number of parallel operations, multiple sub-information items to be written are arranged to obtain at least one sub-information dot matrix to be written. For each of the sub-information dot arrays to be written, based on the preset mapping relationship, each sub-information to be written included in the sub-information dot array is mapped to obtain a light intensity distribution dot array, wherein the light intensity distribution dot array includes light intensities corresponding to each of the multiple sub-information to be written, and different light intensities correspond to different fluorescence defects; The light intensity distribution matrix is ​​input into the parameter determination model to obtain the first writing parameter corresponding to the sub-information matrix to be written; The first write parameters corresponding to at least one of the write dot arrays are sorted to obtain the first write parameter sequence.

6. A system for high-speed, high-density information writing based on fluorescence defects in solid materials, wherein, The system includes: The processor is configured to determine a target write parameter group corresponding to an information write mode and a target movement parameter corresponding to the information write mode, and to send the target write parameter group to the corresponding information write module, and to send the target movement parameter to the base. A laser for generating a laser with an intensity equal to the initial laser intensity to process the solid material; An information writing module is used to modulate the laser based on the target writing parameter set to obtain a modulated laser that matches the information to be written. An optical transmission module is used to transmit the modulated laser to the solid material so that the modulated laser generates multiple storage points on the solid material that match the information to be written, wherein the multiple storage points each have fluorescence defects and the multiple fluorescence defects match the information to be written; A base for holding solid material and causing the solid material to move relative to the modulated laser based on the target movement parameters.

7. The system according to claim 6, wherein, 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 information writing module includes: a laser modulation module and an adaptive optics element; The laser modulation module is used to modulate the initial laser intensity of the laser based on the pulse light amplitude control parameters to obtain a first modulated laser with 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 encoding length; The first adaptive optical element is used to modulate the phase of the first modulated laser based on the pulse light phase modulation parameters, so as to control the convergence of the first modulated laser to obtain a second modulated laser.

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

9. The system according to claim 6, wherein, 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; Wherein, when the information writing mode is determined to be a single-point writing mode, the base is specifically used for: It is used to place solid material and receive a first movement parameter sent by the processor, and is also used to adjust the motion mode of the base 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.

10. The system according to claim 6, wherein, The information writing mode includes a parallel writing mode; when the information writing mode is determined to be a parallel writing mode, the information writing module includes: an adaptive optics element; The second adaptive optics element is used to modulate the phase of the laser based on each of the second write parameters in the second write parameter sequence to obtain a laser dot array corresponding to the first write parameter; when the information writing mode is determined to be a parallel write mode, the base is specifically used for: The device is used to place solid material and to receive a second movement parameter sent by the processor, and also to perform rotation or translation operations based on the second movement parameter.

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