Application of transparent ceramics as multidimensional optical storage media and its processing device

Abstract

The present invention discloses an application of transparent ceramics as a multidimensional optical storage medium and a processing device thereof. The present invention selects transparent ceramics as an optical storage medium, utilizes a focused femtosecond polarized laser to irradiate the transparent ceramics, generates a standing wave field at the focus through interaction, thereby generating nanometer-scale structural points on the surface and / or inside the transparent ceramics as information recording points. According to the technical solution provided by the present invention, based on the interaction mechanism between inorganic transparent ceramics and ultrashort and ultraintense lasers, by changing the output pulse parameters and polarization direction of Gaussian femtosecond lasers, Gaussian femtosecond lasers are used to generate nanometer-scale microstructures to realize multidimensional optical information storage of recording points, thereby realizing multidimensional writing, providing a method for realizing long-term ultra-high-density optical storage, and solving the problem that current organic and organic-inorganic composite optical storage medium materials cannot realize long-term high-density information storage and high-speed reading.

Description

Technical Field

[0001] The present invention relates to the field of optical information storage, and in particular to an application of transparent ceramics as a multi-dimensional optical storage medium and a processing device thereof. Background Art

[0002] With the extensive and in-depth application of the Internet of Things, cloud computing, and artificial intelligence in all walks of life, and the maturity and commercial application of 5G communication technology, mankind has entered the big data era from the information age, and the amount of data that needs to be saved is growing explosively at a rate of doubling every two years. Long-life, safe and reliable, green and energy-saving, and low-cost storage of big data have become common problems faced in the big data era, and will become increasingly prominent. At present, Blu-ray storage has reduced the size of the recording point to about 450nm. Further reduction of the recording point size is limited by the diffraction limit. The technical approach of selecting ultraviolet light with a shorter wavelength and expanding the numerical aperture of the optical system is restricted by cost and technical difficulty and is difficult to achieve in engineering.

[0003] Although organic and organic-inorganic composite optical storage materials can achieve ultra-high density storage, their information storage life is limited by organic matter and cannot achieve long-term secure storage of data. Therefore, how to achieve long-term secure storage of information is a problem that needs to be solved. Summary of the invention

[0004] In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides an application of transparent ceramics as a multi-dimensional optical storage medium and a processing device thereof to achieve long-term and safe information storage.

[0005] The technical solution of the present invention is as follows:

[0006] According to a first aspect of an embodiment of the present disclosure, there is provided an application of a transparent ceramic as a multi-dimensional optical storage medium, comprising:

[0007] Transparent ceramics are irradiated with femtosecond lasers to generate energy thresholds through interaction, thereby generating nanoscale structural points on the surface and / or inside the transparent ceramics as optical information recording points; and the optical information recording points are illuminated with femtosecond lasers to read out the recorded information.

[0008] Preferably, when writing data, the transparent ceramic is placed in a multi-dimensional recording point information writing system, and single-point multi-dimensional high-density writing is achieved by changing the energy parameters and polarization direction of the femtosecond laser;

[0009] When reading data, the transparent ceramic is placed in a multi-dimensional recording point information reading system, and a uniform linear polarized surface light source is used to illuminate the back of the transparent ceramic according to the azimuth angle and incident angle when the recording point is written.

[0010] Preferably, the multi-dimensional recording point information writing system comprises a femtosecond laser, a micro-displacement platform for placing the transparent ceramic, a computer, a detection pinhole, a detector, and a beam adjuster, a first reflector, an attenuator, a shutter, a polarizer, a 1 / 2 wave plate and a spectroscope arranged in sequence along the transmission direction of the femtosecond laser output by the femtosecond laser. After the femtosecond laser is reflected by the spectroscope, it irradiates the transparent ceramic to write information to form an information recording point. After the information recording point reflects the writing laser, it is transmitted through the spectroscope. The transmitted light passes through the analyzer and the detection pinhole in sequence, and is detected by the detector and transmitted to the computer. The computer is electrically connected to the femtosecond laser for The femtosecond laser pulse parameters output by the femtosecond laser are controlled. The computer is electrically connected to the 1 / 2 wave plate to control the rotation of the 1 / 2 wave plate and change the polarization direction of the femtosecond laser, thereby realizing recording of multi-dimensional data at the same recording point. The computer is electrically connected to the polarizer to control the polarization direction of the polarizer, thereby detecting the polarization state of the transmitted light. The computer is electrically connected to the detector to transmit the information obtained by the detector to the computer, thereby realizing real-time monitoring of information writing. The computer is electrically connected to the micro-displacement platform to control the movement of the micro-displacement platform along the three directions of X, Y, and Z axes, thereby realizing three-dimensional writing of the transparent ceramic.

[0011] Preferably, after being reflected by the beam splitter, the femtosecond laser is focused by a lens group to obtain a focused femtosecond laser beam, which is applied to transparent ceramic to achieve writing, and the beam splitter is a depolarizing beam splitter prism.

[0012] Preferably, the multi-dimensional recording point information reading system comprises a femtosecond laser, a micro-displacement platform for placing the transparent ceramic, a computer, a detector, and a beam adjuster, a first reflector, an attenuator, a shutter, a polarizer and a second reflector which are sequentially arranged along the transmission direction of the femtosecond laser output by the femtosecond laser. The femtosecond laser is reflected by the second reflector to form a uniform linearly polarized surface light source, which illuminates the back of the transparent ceramic. After being transmitted through each light information recording point of each layer, it is sequentially focused and imaged through the analyzer and the detection pinhole to form an image of each point of each layer. The image is captured by the detector and transmitted to the computer to decode the multi-dimensional information written in each information recording point in each recording layer. , wherein the computer is electrically connected to the femtosecond laser for controlling the femtosecond laser pulse parameters output by the femtosecond laser, the computer is electrically connected to the polarizer for controlling the polarization direction of the polarizer, thereby obtaining a polarized surface light source, the computer is electrically connected to the analyzer for controlling the direction of the analyzer for focusing and imaging the recording points of each layer, the computer is electrically connected to the detector for transmitting the image captured by the detector to the computer, and the computer is electrically connected to the micro-displacement platform for controlling the micro-displacement platform to move along the three directions of the X, Y, and Z axes, thereby realizing multi-dimensional readout of the three-dimensional surface information of the transparent ceramic.

[0013] Preferably, the second reflector is a polarization-maintaining reflector.

[0014] Preferably, the beam adjuster is a beam expander, which is used to expand the femtosecond laser into a large-aperture surface light source.

[0015] Preferably, the detector is a photomultiplier tube, a charge coupled device (CCD) or a complementary metal oxide semiconductor image sensor (CMOS).

[0016] On the other hand, the present invention also provides a processing device for transparent ceramics as multi-dimensional optical storage media, which is characterized in that it includes:

[0017] A processing module, used for processing transparent ceramics into high-precision polished transparent ceramics;

[0018] A writing module, used to generate a focused femtosecond laser beam and write data on the processed transparent ceramic;

[0019] The readout module is used to generate femtosecond laser and convert it into a uniform linear polarized surface light source to illuminate the back of the transparent ceramic after the information is written, thereby realizing information reading.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1) The present invention utilizes the standing wave field generated by the interaction between inorganic transparent ceramics and femtosecond lasers, and adopts Gaussian femtosecond lasers to realize optical information recording points of nanometer-scale microstructures.

[0022] 2) The high-density optical storage medium of the present invention uses transparent inorganic ceramics. Under appropriate working conditions, a femtosecond laser can generate information recording points of nanometer-scale structure on the surface and / or inside of the transparent ceramic medium to achieve multi-dimensional ultra-high-density optical storage.

[0023] 3) The high-density optical storage of the present invention can realize permanent preservation of recorded information, effectively solving the problem that current organic and organic-inorganic composite optical storage medium materials cannot store information for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present invention, and together with the description are used to explain the principles of the present invention, and do not constitute improper limitations of the present invention.

[0025] Figure 1 A flowchart showing the application of a transparent ceramic as a multi-dimensional optical storage medium according to an embodiment of the present application;

[0026] Figure 2 A framework diagram of a multi-dimensional recording point information writing system according to an embodiment of the present application is shown;

[0027] Figure 3 A framework diagram of a multi-dimensional recording point information reading system according to an embodiment of the present application is shown;

[0028] Figure 4 A block diagram of a processing device for using a transparent ceramic as a multi-dimensional optical storage medium according to an embodiment of the present application is shown;

[0029] Figure 5 A diagram showing the effect of the interaction between the ceramic and the femtosecond laser according to an embodiment of the present application;

[0030] As shown in the figure: 111-high-precision polished transparent ceramic, 21-femtosecond laser, 22-beam adjuster, 23-first reflector, 24-attenuator, 25-shutter, 26-polarizer, 27-1 / 2 wave plate, 281-depolarizing beam splitter, 282-polarization-maintaining second reflector, 29-micro-displacement platform, 30-analyzer, 31-detection pinhole, 32-detector, 33-computer. DETAILED DESCRIPTION

[0031] In order to enable ordinary persons in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0033] See also Figure 1 , Figure 1 is a flowchart of an application of a transparent ceramic as a multi-dimensional optical storage medium according to an embodiment of the present application, such as Figure 1 Shown:

[0034] In an embodiment of the present application, transparent ceramic is selected as the optical storage medium, and inner circle cutting or wire cutting is adopted; after cutting, high-density polishing is performed on the surface of the transparent ceramic, and the polishing accuracy controls the surface roughness Ra to be less than 80nm, so as to obtain high-precision polished transparent ceramic.

[0035] The multi-dimensional recording point information writing system includes a femtosecond laser 21, a beam adjuster 22, a first reflector 23, an attenuator 24, a shutter 25, a polarizer 26, a 1 / 2 wave plate 27, a depolarizing beam splitter prism 281, a micro-displacement platform 29, an analyzer 30, a detection pinhole 31, a detector 32, and a computer 33.

[0036] The processed high-precision polished transparent ceramic 111 is placed on a high-precision micro-displacement platform 29, and a femtosecond laser 21 is used to write optical information. The pulse width, pulse energy, and pulse frequency of the laser beam output by the femtosecond laser 21 are controlled by a computer 33; the rotation direction of the 1 / 2 wave plate 27 is also controlled; the high-precision micro-displacement platform 29 is manipulated to achieve nano-level ultra-high density optical information multi-layer and multi-dimensional recording and storage of the high-precision polished transparent ceramic 111.

[0037] The multi-dimensional recording point information readout system includes a femtosecond laser 21, a beam adjuster 22, a first reflector 23, an attenuator 24, a shutter 25, a polarizer 26, a polarization-maintaining second reflector 282, a micro-displacement platform 29, an analyzer 30, a detection pinhole 31, a detector 32, and a computer 33.

[0038] Information reading is illuminated by a uniform linear polarized surface light source, which is obtained by passing through a beam adjuster 22, a first reflector 23, an attenuator 24, a shutter 25, and a polarizer 26, and is reflected to the back of a high-precision polished transparent ceramic 111 by a polarization-maintaining second reflector 282, and is illuminated according to the azimuth and incident angle when the recording point is written. After being transmitted through each light information recording point of each layer, it is focused and imaged after passing through an analyzer 30 and a detection pinhole 31 in turn to form an image of each point of each layer. The acquired image is captured by a detector 32 and transmitted to a computer 33 for image processing, so as to extract the multi-dimensional information written at each point in each recording layer.

[0039] It should be noted that the following figures show a possible sequence of steps, and in fact, it is not limited to strictly follow this sequence.

[0040] Figure 2 FIG. 1 is a framework diagram of a multi-dimensional recording point information writing system according to an exemplary embodiment. In a possible implementation, Figure 2 As shown, the connection relationship of the multi-dimensional recording point information writing system is as follows:

[0041] The femtosecond laser 21 is arranged in parallel with the first reflecting mirror 23, the beam adjuster 22 is arranged therebetween, the first reflecting mirror 23, the attenuator 24, the shutter 25, the polarizer 26, the 1 / 2 wave plate 27, and the depolarizing beam splitter prism 281 are arranged in sequence; the first reflecting mirror 23 is arranged in parallel with the depolarizing beam splitter prism 281, the detector 32, the detection pinhole 31, the analyzer 30, the depolarizing beam splitter prism 281, the lens group (not shown in the figure), and the micro-displacement platform 29 are arranged in sequence from top to bottom, and the computer 33 is electrically connected to the femtosecond laser 21, the 1 / 2 wave plate 27, the analyzer 30, the micro-displacement platform 29, and the detector 32, respectively.

[0042] The pulse energy parameters of the femtosecond laser 21 are controlled by a computer 33. The emitted laser is expanded by a beam adjuster 22, and passes through a first reflector 23, an attenuator 24, a shutter 25, a polarizer 26, a 1 / 2 wave plate 27, and a depolarizing beam splitter prism 281 in sequence. The polarized femtosecond laser is reflected by the depolarizing beam splitter prism 281 to reach the lens group, and the lens group focuses the polarized femtosecond laser onto a micro-displacement platform 29. The polarized femtosecond laser generates nanometer-scale structural points on the surface and / or inside of a high-precision polished transparent ceramic 111, which are information recording points. The information recording points reflect the writing laser, and after being transmitted through the depolarizing beam splitter prism 281, the transmitted light passes through an analyzer 30 and a detection pinhole 31 in sequence, and is detected by a detector 32 and transmitted to a computer 33, thereby realizing real-time monitoring of information writing. The computer 33 controls the rotation of the 1 / 2 wave plate 27 to change the polarization direction of the polarized femtosecond laser, thereby realizing single-point multi-dimensional recording and writing. The computer 33 then controls the micro-displacement platform 29 to move along the three directions of the X, Y, and Z axes, thereby realizing multi-dimensional and multi-layer recording and writing.

[0043] Figure 3 FIG. 1 is a framework diagram of a multi-dimensional recording point information reading system according to an exemplary embodiment. In a possible implementation, Figure 3 As shown, the connection relationship of the multi-dimensional recording point information reading system is as follows:

[0044] The femtosecond laser 21 is arranged in parallel with the first reflector 23, the beam adjuster 22 is arranged between the two, the first reflector 23, the attenuator 24, the shutter 25, and the polarization-maintaining second reflector 282 are arranged in sequence, the first reflector 23 and the polarization-maintaining second reflector 282 are arranged opposite to each other, the detector 32, the detection pinhole 31, the analyzer 30, the micro-displacement platform 29, and the polarization-maintaining second reflector 282 are arranged in sequence from top to bottom, and the computer 33 is electrically connected to the femtosecond laser 21, the polarizer 26, the analyzer 30, the detector 32, and the micro-displacement platform 29, respectively.

[0045] The laser is emitted by a femtosecond laser 21, and the laser is expanded into a surface light source by a beam adjuster 22, and then passes through a first reflector 23, an attenuator 24, a shutter 25, a polarizer 26, and a polarization-maintaining second reflector 282 in sequence to obtain a uniform linear polarized surface light source, which is used to read out each information recording point of each layer. The uniform linear polarized surface light source is irradiated to the back of the high-precision polished transparent ceramic 111 on the micro-displacement platform 29, and after being transmitted by each light information recording point of each layer, it is sequentially passed through an analyzer 30 and a detection pinhole 31 and then focused to form an image of each point of each layer. The acquired image is captured by a detector 32 and transmitted to a computer 33, and then the multi-dimensional information written in each information recording point in each recording layer is decoded. The polarizer 26 is controlled by the computer 33, and the direction of the polarizer 26 is rotated according to the polarization direction when the information is written, so as to obtain uniform linear polarized surface light sources in different directions, thereby realizing the full reading of single-point multi-dimensional recording data.

[0046] Figure 4 is a block diagram of a processing device for transparent ceramic as a multi-dimensional optical storage medium according to an exemplary embodiment. In a possible implementation, Figure 4 As shown, the processing device includes the following modules:

[0047] A processing module, used for processing transparent ceramics into high-precision polished transparent ceramics;

[0048] A writing module, used to generate a focused femtosecond laser beam and write data on the processed transparent ceramic;

[0049] The readout module is used to generate femtosecond laser and convert it into a uniform linear polarized surface light source to illuminate the back of the transparent ceramic after the information is written, thereby realizing information reading.

[0050] In an optional embodiment, alumina transparent ceramics are used as information storage and recording materials, and a 10mm*10mm*2mm block is obtained by precision cutting of the inner circle, and then a high-precision polished transparent ceramic 111 with a surface roughness Ra less than 80nm is obtained through precision polishing and cleaning. The transparent ceramic is placed on a micro-displacement platform 29 (the displacement accuracy of the micro-displacement platform is 40nm), and the pulse width of a linearly polarized femtosecond laser (TEM00, M^2<1.2) with a wavelength of 1030nm is set to 196fs, the pulse energy is 40μJ, the pulse frequency is 1Hz, and 5 pulses are continuously fired at each recording point. The distance between the recording points in the same plane is 2.46μm; nanoscale information recording points are realized by femtosecond laser, and the direction of the polarizer 26 is rotated to write information in different directions at the same position, and the interval angle of each rotation in the linear polarization direction is 45 degrees; the movement of the micro-displacement platform 29 is controlled by a computer 33, so that the laser is focused on the second layer, the third layer, the fourth layer... of the high-precision polished transparent ceramic 111. The distance between each layer is 60nm, thereby realizing multi-layer and multi-dimensional writing.

[0051] A multi-dimensional recording point information readout system is used to read out the information of each recording point in each layer. The laser emitted by the femtosecond laser is obtained through the beam adjuster 22, the first reflector 23, the attenuator 24, the shutter 25, and the polarizer 26 to obtain a uniform linearly polarized surface light source, and then reflected to the back of the high-precision polished transparent ceramic 111 through the polarization-maintaining second reflector 282. The back of the high-density polished transparent ceramic is illuminated according to the azimuth and incident angle when the recording point is written. The recording points of each layer are focused and imaged by the detection pinhole 31 through the analyzer 30. The detector 32 transmits the image to the computer 33. The data information recorded in each recording point is decoded and read through image processing. The linear polarization direction of the uniform surface light source and the direction of the read analyzer 30 are changed to obtain different information of the same image point in the same data recording layer. The micro-displacement platform 29 is adjusted to read each layer in turn.

[0052] In an optional embodiment, YAG transparent ceramic is used as the information storage recording material, and a 10mm*10mm*2mm block is obtained by inner circle precision cutting, and then a high-precision polished transparent ceramic 111 with a surface roughness Ra less than 80nm is obtained through precision polishing and cleaning. The transparent ceramic is placed on a micro-displacement platform 29 (the displacement accuracy of the micro-displacement platform is 40nm), and the pulse width of a linearly polarized femtosecond laser (TEM00, M^2<1.2) with a wavelength of 1030nm is set to 196fs, the pulse energy is 40μJ, the pulse frequency is 1Hz, and 5 pulses are continuously fired at each recording point. The distance between the recording points in the same plane is 2.46μm; nanoscale information recording points are realized by femtosecond laser, and the direction of the polarizer 26 is adjusted to write information in different directions at the same position, and the interval angle of each rotation in the linear polarization direction is 45 degrees; the movement of the micro-displacement platform 29 is controlled by a computer 33, so that the laser is focused on the second layer, the third layer, the fourth layer... of the high-precision polished transparent ceramic 111. The distance between each layer is 60nm, thereby realizing multi-layer and multi-dimensional writing.

[0053] A multi-dimensional recording point information readout system is used to read out the information of each recording point in each layer. The laser emitted by the femtosecond laser is obtained through the beam adjuster 22, the first reflector 23, the attenuator 24, the shutter 25, and the polarizer 26 to obtain a uniform linearly polarized surface light source, and then reflected to the back of the high-precision polished transparent ceramic 111 through the polarization-maintaining second reflector 282. The back of the high-density polished transparent ceramic is illuminated according to the azimuth and incident angle when the recording point is written. The recording points of each layer are focused and imaged by the detection pinhole 31 through the analyzer 30. The detector 32 transmits the image to the computer 33. The data information recorded in each recording point is decoded and read through image processing. The linear polarization direction of the uniform surface light source and the direction of the read analyzer 30 are changed to obtain different information of the same image point in the same data recording layer. The micro-displacement platform 29 is adjusted to read each layer in turn.

[0054] Figure 5 is a diagram showing the effect of ceramics interacting with femtosecond laser according to an exemplary embodiment. In a possible implementation, Figure 5 As shown:

[0055] The pulse width of the femtosecond laser is set to 196fs, the pulse energy is 40μJ, the pulse frequency is 1Hz, and each recording point is continuously pulsed 5 times, so that the laser emitted by the femtosecond laser 21 is focused on the high-precision polished transparent ceramic 111 to form a nano-scale structure point, and the effect is read out by the multi-dimensional recording point information readout system as shown in the figure Figure 5 shown.

[0056] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0057] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. Application of transparent ceramics as multidimensional optical storage media, characterized in that: Transparent ceramics are irradiated with femtosecond polarized lasers to generate standing wave fields through interaction, thereby generating nanometer-scale structural points on the surface and / or inside the transparent ceramics as optical information recording points; the polarization direction of the femtosecond laser is changed to achieve single-point multi-dimensional high-density writing, and the optical information recording points are illuminated with femtosecond polarized lasers to read out the recorded information.

2. The use of the transparent ceramic as a multi-dimensional optical storage medium according to claim 1, characterized in that: When writing data, the transparent ceramic is placed in a multi-dimensional recording point information writing system, and single-point multi-dimensional high-density writing is achieved by changing the output pulse parameters and polarization direction of the femtosecond laser; When reading data, the transparent ceramic is placed in a multi-dimensional recording point information reading system, and a uniform linear polarized surface light source is used to illuminate the back of the transparent ceramic so as to read the corresponding information according to the azimuth and incident angle when the recording point is written.

3. The use of the transparent ceramic as a multi-dimensional optical storage medium according to claim 2, characterized in that: The multi-dimensional recording point information writing system comprises a femtosecond laser, a micro-displacement platform for placing the transparent ceramic, a computer, an analyzer, a detection pinhole, a detector, and a beam adjuster, a first reflector, an attenuator, a shutter, a polarizer, a 1 / 2 wave plate and a spectroscope which are sequentially arranged along the transmission direction of the femtosecond laser output by the femtosecond laser. After the femtosecond laser is reflected by the spectroscope, it irradiates the transparent ceramic to write information to form an information recording point. After the information recording point reflects the writing laser, it is transmitted by the spectroscope. The transmitted light sequentially passes through the analyzer and the detection pinhole, and is detected by the detector and transmitted to the computer. The computer is electrically connected to the femtosecond laser and is used for The femtosecond laser pulse parameters output by the femtosecond laser are controlled. The computer is electrically connected to the 1 / 2 wave plate to control the rotation of the 1 / 2 wave plate and change the polarization direction of the femtosecond laser, thereby realizing recording of multi-dimensional data at the same recording point. The computer is electrically connected to the polarizer to control the rotation polarization direction of the polarizer to detect the polarization state of the transmitted light. The computer is electrically connected to the detector to transmit the information obtained by the detector to the computer, thereby realizing real-time monitoring of information writing. The computer is electrically connected to the micro-displacement platform to control the movement of the micro-displacement platform along the three directions of X, Y, and Z axes, thereby realizing three-dimensional writing of the transparent ceramic.

4. The use of the transparent ceramic as a multi-dimensional optical storage medium according to claim 3, characterized in that: After being reflected by the beam splitter, the femtosecond laser is focused by a lens group to obtain a focused femtosecond laser beam, which is then acted on transparent ceramics to achieve writing. The beam splitter is a depolarizing beam splitter prism.

5. The use of the transparent ceramic as a multi-dimensional optical storage medium according to claim 2, characterized in that: The multi-dimensional recording point information reading system comprises a femtosecond laser, a micro-displacement platform for placing the transparent ceramic, a computer, an analyzer, a detection pinhole, a detector, and a beam adjuster, a first reflector, an attenuator, a shutter, a polarizer, and a second reflector arranged in sequence along the transmission direction of the femtosecond laser output by the femtosecond laser. The femtosecond laser is reflected by the second reflector to form a uniform linear polarized surface light source, which illuminates the back of the transparent ceramic, and after being transmitted through each light information recording point of each layer, it is focused and imaged after passing through the analyzer and the detection pinhole in sequence to form an image of each point of each layer, which is captured by the detector and transmitted to the computer to decode the multi-dimensional recording point written in each recording layer. dimensional information, wherein the computer is electrically connected to the femtosecond laser for controlling the femtosecond laser pulse parameters output by the femtosecond laser, the computer is electrically connected to the polarizer for controlling the polarization direction of the polarizer, thereby obtaining a polarized surface light source, the computer is electrically connected to the analyzer for controlling the direction of the analyzer for focusing and imaging the recording points of each layer, the computer is electrically connected to the detector for transmitting the image captured by the detector to the computer, and the computer is electrically connected to the micro-displacement platform for controlling the micro-displacement platform to move along the three directions of the X, Y, and Z axes, thereby realizing multi-dimensional readout of the three-dimensional surface information of the transparent ceramic.

6. The use of the transparent ceramic as a multi-dimensional optical storage medium according to claim 5, characterized in that: The second reflector is a polarization-maintaining reflector.

7. The use of the transparent ceramic as a multi-dimensional optical storage medium according to claim 3 or 5, characterized in that: The beam adjuster is a beam expander, which is used to expand the femtosecond laser into a large-aperture surface light source.

8. The use of the transparent ceramic as a multi-dimensional optical storage medium according to claim 3 or 5, characterized in that: The detector is a photomultiplier tube, a charge coupled device (CCD), or a complementary metal oxide semiconductor image sensor (CMOS).

9. A processing device for transparent ceramics as multi-dimensional optical storage media, characterized in that: include: A processing module, used for processing transparent ceramics into high-precision polished transparent ceramics; A writing module is used to generate a focused polarized femtosecond laser beam and generate nanometer-scale structural points on the surface and / or inside of the high-precision polished transparent ceramic as optical information recording points, and change the output pulse parameters and polarization direction of the femtosecond laser beam to achieve single-point multi-dimensional high-density writing; The readout module is used to generate femtosecond laser and convert it into a uniform linear polarized surface light source to irradiate the back of the transparent ceramic after information is written, changing the output pulse parameters and polarization direction of the femtosecond laser, thereby realizing multi-dimensional information reading on the surface and / or inside of the transparent ceramic.

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