CN113488094A - Preparation method and demodulation method of optical fiber data memory - Google Patents
Preparation method and demodulation method of optical fiber data memory Download PDFInfo
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- CN113488094A CN113488094A CN202110736382.4A CN202110736382A CN113488094A CN 113488094 A CN113488094 A CN 113488094A CN 202110736382 A CN202110736382 A CN 202110736382A CN 113488094 A CN113488094 A CN 113488094A
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- G11C13/047—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam using electro-optical elements
Abstract
The invention provides a preparation method of an optical fiber data memory, which comprises the following steps: s1, processing the data information to be stored, and converting the data information into data with unified number system; then according to the preset rule, converting the space distribution rule into the space distribution rule of the fiber grating array along the axial direction of the optical fiber; and S2, writing the fiber grating array in the fiber core by the femtosecond laser according to the space distribution rule of the fiber grating array obtained in the step S1, and writing and storing the data of the unified number system in the fiber grating array. In addition, the application also provides a demodulation method of the optical fiber data memory. According to the method, the flexibility and the accuracy of femtosecond laser processing are utilized, and the preparation parameters can be flexibly changed through data preprocessing; on the premise of not damaging the original mechanical strength of the optical fiber, the automatic writing of mass data can be accurately realized; the data storage device prepared by the method is suitable for long-term storage in working environments such as a strong magnetic field and high temperature.
Description
Technical Field
The invention relates to the technical field of memories, in particular to a preparation method and a demodulation method of an optical fiber data memory.
Background
Existing memories are typically either magnetic or optical memories.
The magnetic memory uses surface magnetic medium as information recording carrier, and uses two different remanence states or remanence directions to represent the on-off state of 0 or 1, so as to implement binary digital information storage.
Magnetic memories are currently the most commonly used memories, but they have the following disadvantages: 1. the magnetic memory usually needs more machines and circuit systems, such as a signal recording circuit, a signal reproducing circuit, a servo mechanical system and the like, the size of the system is larger, and a large space is needed for storing a large amount of data in a magnetic storage mode due to the exponential explosion growth of the data; 2. the magnetic memory has the problem of short service life, and the magnetic memory is difficult to meet the requirement on data needing to be stably stored for a long time; 3. magnetic memories typically require long-term power supplies, which greatly increases the cost and power consumption of using magnetic storage.
In the conventional optical storage, the laser generates structural change on the recording layer of the optical disc, thereby changing the refractive index of the local region. When light shines on it, there will be different reflected signals, which are then converted into digital signals of 0 or 1.
Such optical memories have achieved higher storage densities in combination with multi-dimensional multiplexing techniques, but they still have some disadvantages: 1. the conventional optical storage device cannot be stored under strong light to prevent the influence of light on the memory material and the internal information; 2. because the high temperature has great influence on the materials of the traditional optical memory, the optical memory cannot be stored and work in a high-temperature environment; 3. since conventional optical storage devices are subject to wear, better mechanical protection is required during storage.
Disclosure of Invention
In view of the shortcomings of the prior art, the present invention provides a method for preparing an optical fiber data memory and a method for demodulating the same.
The application provides a preparation method of an optical fiber data memory, which comprises the following steps:
s1, processing the data information to be stored, and converting the data information into data with unified number system; then according to the preset rule, converting the space distribution rule into the space distribution rule of the fiber grating array along the axial direction of the optical fiber;
and S2, writing the fiber grating array in the fiber core by the femtosecond laser according to the space distribution rule of the fiber grating array obtained in the step S1, and writing and storing the data of the unified number system in the fiber grating array.
According to the preparation method of the optical fiber data storage provided by the embodiment of the application, in the step S1, the data of the unified number system is multi-system data.
According to the preparation method of the optical fiber data memory provided by the embodiment of the application, multi-system coding is realized by controlling the modulation intensity of different grating segments.
According to the preparation method of the optical fiber data memory provided by the embodiment of the application, multi-system coding is realized by controlling the grating periods of different grating segments.
According to the preparation method of the optical fiber data storage provided by the embodiment of the application, the optical fiber grating array comprises a plurality of grating segments, one grating segment is used for defining one bit of data, and the grating segment is composed of a plurality of gratings with the same period.
According to the preparation method of the optical fiber data storage provided by the embodiment of the application, the optical fiber further comprises a cladding layer and a coating layer, wherein the cladding layer is positioned outside the fiber core of the optical fiber.
According to the preparation method of the optical fiber data storage provided by the embodiment of the application, the optical fiber grating array is of a linear array structure or a point array structure.
The application also provides a demodulation method of the optical fiber data memory, wherein the optical fiber data memory is obtained by the preparation method; the demodulation method comprises the following steps:
s3, reading the time domain reflection signal of the optical fiber data memory through the time domain reflection signal detection terminal;
and S4, processing the obtained time domain reflection signal by using a demodulation program, restoring written data information, and realizing data demodulation of the fiber grating array.
According to the demodulation method of the optical fiber data storage provided by the embodiment of the application, in the step S3, one end of the optical fiber data storage is connected to a time domain reflection signal detection terminal through an optical fiber jumper, and the time domain reflection signal detection terminal is connected to a computer; and detecting and recording the time domain reflection signal of the fiber grating array through a time domain reflection signal detection terminal.
According to the demodulation method of the optical fiber data storage provided by the embodiment of the application, in step S4, the obtained time domain reflection signal is processed by a demodulation program in a computer, and data written in the fiber grating array is obtained.
The invention has the following beneficial effects:
according to the method, the flexibility and the accuracy of femtosecond laser processing are utilized, and the preparation parameters can be flexibly changed through data preprocessing; on the premise of not damaging the original mechanical strength of the optical fiber, the automatic writing of mass data can be accurately realized. Compared with a magnetic memory, the fiber data memory is based on a fiber grating array data storage mode, is small in size, and can realize high-density storage by utilizing the fiber grating array micromachined by femtosecond laser. Because the optical fiber is anti-electromagnetic interference and the written optical fiber grating array is high temperature resistant, the optical fiber data memory prepared by the method can be stably stored and work in the environment of strong magnetic field. The fiber grating array can be stably stored for a long time, and the influence of temperature, humidity and the like on materials is not needed to be worried in the process, and power supply use and the like are also not needed. The method can be applied to scenes such as large data storage and special information encryption which need to be stored for a long time, and can also be used as a means for storing important information in extreme environments. Therefore, the data can be stably stored in the fiber grating array, and the long-term use cost is lower for the data type needing stable storage.
The traditional optical storage device has strict requirements on external conditions such as illumination, temperature and the like. Although the fiber grating device also responds to external conditions, the fiber grating device does not greatly influence information writing and reading in data storage and demodulation. The fiber grating array based on femtosecond laser micromachining can stably work in a high-temperature environment as high as 800 ℃, so that the use scene of a fiber grating array data memory is expanded, and the limitation to the working environment is reduced.
Drawings
FIG. 1 is a schematic diagram of a fiber optic data storage device according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a fiber optic data storage device according to another embodiment of the present application;
fig. 3 is a schematic structural diagram of the demodulation system of the fiber data storage device of the present application.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
In order to make the objects, technical solutions and advantages of the present invention clearer and more clear, the present invention will be described in further detail with reference to the accompanying drawings and exemplary embodiments. However, the present invention is not limited to the exemplary embodiments disclosed below; it can be implemented in different forms. The nature of the description is merely to assist those skilled in the relevant art in a comprehensive understanding of the specific details of the invention.
An optical fiber data storage device includes an optical fiber, and an information element located in a core (32) of the optical fiber. The information unit of the embodiment of the present application is a fiber grating array (33), and the data information is stored in the fiber grating array (33) by femtosecond laser writing.
In the embodiment of the present application, the fiber grating array (33) includes a plurality of grating segments (301), one grating segment (301) is used to define one bit of data, and the grating segment (301) is composed of a plurality of gratings with the same period.
According to the method, the data information needing to be stored can be processed and converted into data with a unified number system; and establishing a corresponding rule between the grating and the data information according to a preset rule. The stored data information is recorded by using a fiber grating array (33).
The data information of the unified number system is multi-system data, such as binary system, quaternary system, octal system and the like. It is to be understood that the multilevel numerical system is not limited thereto.
For example, data information is converted into binary data, and the encoding of the binary data is represented by a binary 0 or 1. The encoding bit 0 or 1 is represented by a raster segment (301), and a specific rule that encoding bit data is represented by a raster segment is set, such as a group of several (N, N > = 1) rasters, to represent 0 or 1.
Referring to fig. 1, which is a schematic diagram of an optical fiber data storage according to an embodiment, a plurality of rasters are a raster segment (301), and one raster segment (301) is a bit of coded bits, which represents 1. In fig. 1, the fiber grating array (33) has 6 such grating segments (301), and the pitch (interval between encoding bits) of the grating segments (301) is fixed. Each raster segment (301) (encoded bits) occupies the same physical space length. The spatial distribution of the fiber grating array (33) represents the binary code 111111.
Referring to fig. 2, which is a schematic diagram of another embodiment of the fiber optic data storage, several gratings are a grating segment (301), which represents 1. The spacing between raster segments (301) (encoding bits) is fixed, with 4 raster segments (301) in total. And two non-light grating areas, indicating that the coded bit represents a data 0. The fiber grating array (33) in fig. 2, represents the binary code 101011.
Fig. 1 and 2 only show one application of the data information expressed by the fiber grating array (33), and it should be understood that the rule of correspondence between the grating and the data information is not limited thereto.
The grating in the fiber grating array (33) can be in a linear array structure as shown in the figure and figure 2, or can also be in a point array structure.
The data information is represented by binary data, and the presence or absence of spatial distribution of the raster segments (301) represents a 1 or a 0.
On the basis, the data information can be converted into quaternary system, octal system and other data, and the binary system-to-multilevel code can be realized by controlling the modulation intensity of different grating segments (301). On the basis, various combinations such as quaternary system, octal system and the like can be realized through the strength of the reflected signals.
Therefore, the grating segments (301) with different modulation intensities can be used as the stored segments, and the multilevel storage such as quaternary system, octal system and the like can be realized by distinguishing the intensity of the grating reflected signals with different modulation intensities. The principle is that different grating segments (301) adopt different laser energy and other modes to introduce different modulation amounts, and the intensity of time domain reflected signals is different. And by defining different intensity intervals of the reflected signals as distinction, data recovery is carried out by adopting a corresponding system demodulation method according to different intensities during demodulation. Due to the large number of grating periods, there is a complex arrangement in the wavelength domain. The data can be encrypted by defining the data corresponding to different grating periods.
According to the method and the device, the multi-system coding can be realized by controlling the grating periods of different grating segments. The grating segments (301) for representing the encoded bits of the multilevel data information may be fiber gratings with the same grating period. Alternatively, the storage density can be further optimized by fiber gratings with different grating periods. Because the fiber gratings with different grating periods can reflect light with different wavelengths, grating reflection signals with different periods are respectively detected by adjusting the input wavelength of the time domain reflection signal detection terminal during demodulation, so that multilevel storage is realized by utilizing the signals, and finally, the extraction and recovery of original data are realized by integrating a plurality of groups of data.
The application also provides a preparation method of the optical fiber data memory, which comprises the following steps:
s1, processing the data information to be stored; converting into a space distribution rule of a fiber grating array (33) along the axial direction of the optical fiber;
and S2, writing the fiber grating array (33) in the fiber core by using femtosecond laser according to the space distribution rule of the fiber grating array (33) obtained in S1.
In step S1, the data information to be stored is processed and converted into data of unified number system; and then according to a preset rule, converting the space distribution rule into a space distribution rule of the fiber grating array (33) along the axial direction of the optical fiber.
In step S1, the information data to be stored is analyzed, and the data to be stored is unified into multi-system data, such as binary, quaternary, octal, etc.
Taking binary as an example, the binary sequence is represented by binary 0 or 1; the writing sequence and the spatial axial distribution of the fiber grating array (33) are expressed, so that binary data are converted into a spatial distribution rule of the fiber grating array in the axial direction, and the preparation parameters of the fiber grating array (33) are obtained. Other binary information data need to be converted into binary representation. In the fiber grating array (33), a plurality of gratings are used as a group to represent one bit of data, and finally the data is processed in a demodulation algorithm.
Compared with a magnetic memory, the fiber data memory is a data storage mode based on the fiber grating array (33), is small in size, and can realize high-density storage by using the fiber grating array (33) micro-machined by femtosecond laser. Because the optical fiber is anti-electromagnetic interference, the memory can be stably stored and work in the environment of strong magnetic field. The fiber grating array (33) can be stored stably for a long time, and the influence of temperature, humidity and the like on materials is not needed to be worried about in the process, and power supply use and the like are also not needed. Therefore, the data can be stably stored in the fiber grating array (33), and the long-term use cost is lower for the data type needing stable storage.
The traditional optical storage device has strict requirements on external conditions such as illumination, temperature and the like. Although the fiber grating device also responds to external conditions, the fiber grating device does not greatly influence information writing and reading in data storage and demodulation. The fiber grating array (33) based on femtosecond laser micromachining can stably work in a high-temperature environment as high as 800 ℃, so that the use scene of a data memory of the fiber grating array (33) is expanded, and the limitation to the working environment is reduced.
The optical fiber data memory can be realized by processing the fiber bragg grating through femtosecond laser when data are written.
The optical fiber is fixed on the three-dimensional displacement platform, and the platform is adjusted to enable the femtosecond laser to be accurately focused on the fiber core of the optical fiber. And selecting a microscope objective with high multiplying power and large numerical aperture as a processing objective. Inputting the obtained preparation parameters, such as the space distribution rule of grating writing, the length of the grating segment (301) (the physical space length occupied by each encoding bit), the pitch of the grating segment (301) (the interval between encoding bits) and the like, and starting to automatically prepare the fiber grating array (33). And (4) writing fiber gratings at different positions of the axial direction of the optical fiber according to the rule obtained in the step S1, wherein the fiber gratings at each position are point arrays or line arrays engraved by femtosecond laser micromachining, and the length of each small segment of the grating is only in the micrometer level.
The femtosecond laser is used for writing, parameters can be adjusted timely, the preparation is flexible, the processing speed is high, and the efficiency is high. By using the precision of the femtosecond laser micromachining method, structures with certain rules, such as a line array, a point array and the like, can be inscribed on the fiber core of the optical fiber, so that the refractive index of the optical fiber is modulated.
The principle of the data storage of the fiber grating array (33) is that in the same section of optical fiber, signal light reflected by fiber gratings at different positions has a certain time delay, and the spatial position of the reflection signal corresponding to the optical fiber can be demodulated by measuring a time domain reflection signal of the fiber grating array (33).
In the process of processing, taking binary as an example, a binary coded sequence with known 1 or 0 can be converted into existence or nonexistence of a spatial grating, and signals are quickly and accurately written into the optical fiber through a femtosecond laser. During demodulation, only the time domain reflection signal needs to be extracted and post-processed by utilizing a written program, so that written information is restored.
On the basis, by changing the modulation intensity of different grating segments, the code converted from binary to multilevel can be realized. The presence or absence of the spatial distribution of the grating represents 1 or 0, and various combinations such as quaternary system, octal system and the like can be realized through the strength of the reflected signal on the basis. And by defining different intensity intervals of the reflected signals as distinction, data recovery is carried out by adopting a corresponding system demodulation method according to different intensities during demodulation.
As shown in the optical fiber data storage of fig. 1, the optical fiber grating array (33) indicates that 6 optical fiber grating segments (301) are written in different positions continuously in a section of optical fiber, 6 reflected signal peaks exist in the time domain at the output end, and the information is demodulated, so that the section of optical fiber grating array (33) is considered to have coding information as 6 bits of data in total, and the data is all 1.
The application also provides a demodulation system of the optical fiber data storage, which comprises a computer, a time domain reflection signal detection terminal and the optical fiber data storage.
One end of the optical fiber data memory is connected to the time domain reflection signal detection terminal through an optical fiber jumper, and the time domain reflection signal detection terminal is connected with the computer. The time domain reflection signal detection terminal is used for detecting and recording the time domain reflection signals of the fiber bragg grating array (33);
the computer is used for processing the obtained time domain reflection signals and extracting and obtaining data information written in the fiber grating array (33).
The application also provides a demodulation method of the optical fiber data memory, which can extract the stored data information by the following method:
s3, reading the time domain reflection signal of the optical fiber data memory through the time domain reflection signal detection terminal;
and S4, processing the obtained time domain reflection signal by using a demodulation program, restoring written data information, and realizing data demodulation of the optical fiber grating array (33).
In the step S3, one end of the optical fiber data storage is connected to the time domain reflection signal detection terminal through an optical fiber jumper, and the time domain reflection signal detection terminal is connected to the computer; and detecting and recording the time domain reflection signal of the fiber grating array (33) through a time domain reflection signal detection terminal.
In the above step S4, the obtained time domain reflection signal is subjected to data demodulation processing by a demodulation program in the computer, and data written in the fiber grating array (33) is obtained.
For the fiber grating array (33) data memory which is written with data, the data acquisition is realized by measuring the time domain reflection signal of the fiber grating array (33). Fig. 3 is a schematic diagram of the demodulation system, in which (1) is a time domain reflection signal detection terminal, (2) is a computer, and (3) is an optical fiber data storage.
Before extraction and demodulation, calibration matching is firstly carried out on the time domain reflected signal detection terminal (1), a detection light signal is irradiated on a reflecting surface with a fixed length in the calibration process, and specifically, a beam of detection light is emitted to a jumper wire with a known length and a known medium by the time domain reflected signal detection terminal (1). The jumper end face is gold plated to reflect the optical signal which is then detectable from the terminal after a known time delay. The characteristic that light waves with fixed wavelengths are unchanged in the same medium and the same length and the propagation time is utilized, and the time domain reflected signal detection terminal is calibrated by utilizing the principle. The apparatus 1 is calibrated with a known time delay as calibration condition.
When the data is read in step S3, one end of the fiber grating array (33) data storage is accessed to the time domain reflection signal detection terminal through the fiber jumper, the time domain reflection signal detection terminal 1 sends out a probe light signal and inputs the probe light signal into the optical fiber, the time domain reflection signal detection terminal 1 scans and acquires and records the time domain reflection signal of the fiber grating array (33), and signal recording is realized by collecting the time domain reflection signal of the fiber grating array (33).
Finally, the acquired time domain reflection signal is post-processed through a demodulation program in the computer (2), and storage information corresponding to the fiber bragg grating array (33) is extracted; as described in step S4.
The computer (2) adopts the programmed program to perform operations such as low-pass filtering, signal peak extraction, encoding and the like on the obtained time domain reflection signal, finally realizes the data demodulation of the fiber grating array (33), and obtains the data written in the fiber grating array (33).
After data demodulation, multilevel data such as binary data can be obtained. If the original data is non-binary data, only the corresponding binary system needs to be selected in the demodulation algorithm for corresponding recovery processing.
The time domain reflection signal of the optical fiber grating array (33) is used as a demodulation mode, complex operation is not needed during data extraction, the reflected time sequence signal can be obtained through a sensitive detector, and then data extraction and recovery can be completed after a compiled demodulation program is used and required parameters are configured.
The application provides an optical fiber data memory, which is a firm and stable optical fiber grating array (33) data memory. Compared with the existing magnetic memory and the traditional optical memory, the method has the outstanding advantages that the flexibility and the accuracy of femtosecond laser processing can be utilized, the preparation parameters can be flexibly changed through data preprocessing, further, large batch of data can be automatically written into the optical fiber, and the automatic writing of the large batch of data is realized on the premise of ensuring the accuracy of information. On the premise of not damaging the original mechanical strength of the optical fiber, data is written into the optical fiber in batches and automatically, so that the large data storage of information in severe environments such as high temperature and high pressure can be realized, the limitation of the traditional storage mode to the environment is reduced, and the maintenance cost required by the traditional storage mode is reduced. Meanwhile, the optical fiber resists electromagnetic interference, and the written optical fiber grating array (33) resists high temperature, so the data storage device can be suitable for working environments with strong magnetic fields, high temperature and the like. The optical fiber data memory can be applied to scenes such as large data storage and special information encryption which need to be stored for a long time, and can also be used as a means for storing important information in an extreme environment.
The optical fiber data storage device comprises a cladding (31), and the cladding (31) is provided with a coating layer (not shown in the figure). The femtosecond laser is used for writing, and because the data memory of the fiber grating array (33) directly writes information into the fiber core of the optical fiber, the coating layer of the optical fiber does not need to be removed in the process, so that the mechanical strength of the optical fiber is not influenced. Therefore, the memory has low requirement on storage environment, and the data does not need to be changed or disappeared due to mechanical wear, so that the maintenance cost is hardly needed. Therefore, the fiber grating array (33) data memory can be well protected, and therefore, excessive mechanical protection devices are not needed for storing the memory.
The optical fiber data storage device manufactured by femtosecond laser processing is suitable for stably storing various kinds of big data because the optical fiber data storage device does not have excessive requirements on use scenes and environmental conditions. For a database with more data and needing to be stored for a long time, the data storage can realize batch writing of large-scale data by utilizing the precise characteristic of femtosecond laser processing, so that stable and low-cost storage of the data can be realized.
The optical fiber data storage device provided by the application can be used for data storage and information encryption. Redundant interference information is added into the information data, and all the information is written into the fiber grating array. During demodulation, redundant information is removed through a specific algorithm, so that effective information is accurately extracted, and data encryption is realized. The data represented by the grating segments with different intensities or periods can also be specially defined through a specific demodulation algorithm, and only the corresponding algorithm can recover the original data.
It is to be understood that the above-described embodiments are only some of the embodiments of the present application, and not all embodiments of the present application. This application is capable of embodiments in many different forms and is provided for the purpose of enabling a thorough understanding of the disclosure of the application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that the present application may be practiced without modification or with equivalents of some of the features described in the foregoing embodiments. All equivalent structures made by using the contents of the specification and the drawings of the present application are directly or indirectly applied to other related technical fields and are within the protection scope of the present application.
Claims (10)
1. A method for preparing an optical fiber data storage device, the method comprising the steps of:
s1, processing the data information to be stored, and converting the data information into data with unified number system; then according to the preset rule, converting the space distribution rule into the space distribution rule of the fiber grating array along the axial direction of the optical fiber;
and S2, writing the fiber grating array in the fiber core by the femtosecond laser according to the space distribution rule of the fiber grating array obtained in the step S1, and writing and storing the data of the unified number system in the fiber grating array.
2. The method for manufacturing an optical fiber data storage according to claim 1, wherein in step S1, the uniform numerical data is multi-level data.
3. The method of claim 2, wherein the multilevel coding is implemented by controlling the modulation intensity of different grating segments.
4. The method of claim 2, wherein the multilevel coding is implemented by controlling the grating period of different grating segments.
5. The method of claim 1, wherein the fiber grating array comprises a plurality of grating segments, one grating segment defining one bit of data, the grating segment comprising a plurality of gratings with the same period.
6. The method of claim 1, wherein the optical fiber further comprises a cladding layer disposed outside the core of the optical fiber, and a coating layer.
7. The method of claim 1, wherein the fiber grating array is a line array structure or a dot array structure.
8. A demodulation method of an optical fiber data storage, characterized in that the optical fiber data storage is obtained by the preparation method of any one of claims 1 to 7; the demodulation method comprises the following steps: s3, reading the time domain reflection signal of the optical fiber data memory through the time domain reflection signal detection terminal;
and S4, processing the obtained time domain reflection signal by using a demodulation program, restoring written data information, and realizing data demodulation of the fiber grating array.
9. The demodulation method of the optical fiber data storage according to claim 8, wherein in step S3, one end of the optical fiber data storage is connected to a time domain reflection signal detection terminal through an optical fiber jumper, and the time domain reflection signal detection terminal is connected to a computer; and detecting and recording the time domain reflection signal of the fiber grating array through a time domain reflection signal detection terminal.
10. The demodulation method for fiber optic data storage according to claim 9 wherein in step S4, the obtained time domain reflection signal is processed by a demodulation program in a computer and data written in the fiber grating array is obtained.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114124207A (en) * | 2021-11-29 | 2022-03-01 | 中山水木光华电子信息科技有限公司 | All-optical storage system and method based on optical fiber coding |
| CN114142921A (en) * | 2021-12-09 | 2022-03-04 | 中山水木光华电子信息科技有限公司 | All-optical storage system and method based on different central wavelength optical fiber codes |
| WO2023273185A1 (en) * | 2021-06-30 | 2023-01-05 | 深圳大学 | Optical fiber data storage device, and preparation method and demodulation method therefor |
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| WO2023273185A1 (en) * | 2021-06-30 | 2023-01-05 | 深圳大学 | Optical fiber data storage device, and preparation method and demodulation method therefor |
| CN114124207A (en) * | 2021-11-29 | 2022-03-01 | 中山水木光华电子信息科技有限公司 | All-optical storage system and method based on optical fiber coding |
| CN114124207B (en) * | 2021-11-29 | 2023-01-06 | 中山水木光华电子信息科技有限公司 | All-optical storage system and method based on optical fiber coding |
| CN114142921A (en) * | 2021-12-09 | 2022-03-04 | 中山水木光华电子信息科技有限公司 | All-optical storage system and method based on different central wavelength optical fiber codes |
| CN114142921B (en) * | 2021-12-09 | 2023-02-28 | 中山水木光华电子信息科技有限公司 | All-optical storage system and method based on different central wavelength optical fiber codes |
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