CN114124207B - All-optical storage system and method based on optical fiber coding - Google Patents
All-optical storage system and method based on optical fiber coding Download PDFInfo
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- CN114124207B CN114124207B CN202111438040.0A CN202111438040A CN114124207B CN 114124207 B CN114124207 B CN 114124207B CN 202111438040 A CN202111438040 A CN 202111438040A CN 114124207 B CN114124207 B CN 114124207B
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 152
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- 229920006395 saturated elastomer Polymers 0.000 claims description 4
- 229920002959 polymer blend Polymers 0.000 claims description 3
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- 239000004954 Polyphthalamide Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
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- 229920001721 polyimide Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/508—Pulse generation, e.g. generation of solitons
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/572—Wavelength control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0202—Arrangements therefor
- H04J14/0204—Broadcast and select arrangements, e.g. with an optical splitter at the input before adding or dropping
Abstract
The invention discloses an all-optical storage system and a method based on optical fiber coding, wherein the all-optical storage system comprises: a high-speed main control chip; a tunable pulsed light source; the output end of the circulator is connected with a trunk optical fiber; n optical splitters connected in series with the main optical fiber, wherein the light splitting ends of the optical splitters are connected with branch optical fibers; n photosensitive memory cells; the photosensitive storage units comprise storage substrates, photosensitive deformation media and optical fiber codes, the optical fiber codes of the N photosensitive storage units are different, the photosensitive deformation media can be excited into different forms according to different light intensities, and the forms comprise initial flat states capable of reflecting light waves and concave-convex states capable of not reflecting light waves; and the light wave collector is connected between the input light wave end of the circulator and the receiving end of the high-speed main control chip. The scheme utilizes the optical identification characteristic of optical fiber coding to realize the coding of the storage unit, realizes the existence or non-existence state of the storage unit by the deformation of the photosensitive material, and further realizes the all-optical coding storage.
Description
Technical Field
The invention relates to the field of optical fiber communication, in particular to an all-optical storage system and method based on optical fiber coding.
Background
The optical fiber code is formed by a series of different wavelength gratings according to regular intervals, has the characteristic of uniqueness identification, and can be widely applied to the fields of optical fibers, optical fiber jumpers, optical instruments, optical communication equipment and the like. At present, the research on optical fiber codes is only on the primary optical fiber code identification level, and the optical fiber codes cannot be identified and stored.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an all-optical storage system based on optical fiber coding, which can identify storage.
An optical fiber coding-based all-optical storage system according to an embodiment of the first aspect of the present invention includes: a high-speed main control chip; the tunable pulse light source is connected with the high-speed main control chip and used for outputting light waves according to light-emitting instructions of the high-speed main control chip, and the light-emitting instructions comprise light-emitting central wavelength, pulse time and light wave intensity; the circulator is used for realizing optical wave transmission according to a path, the input end of the circulator is connected with the output end of the tunable pulse light source, and the output end of the circulator is connected with a main optical fiber; n optical splitters connected in series with the trunk optical fiber, wherein the light splitting ends of the optical splitters are connected with branch optical fibers; n photosensitive storage units which are connected to the branch optical fibers of the optical splitter in a one-to-one correspondence manner; the photosensitive storage unit comprises a storage substrate, a photosensitive deformation medium and optical fiber codes, wherein the optical fiber codes are repeatedly engraved on the branch optical fibers, the tail ends of the branch optical fibers are connected with the photosensitive deformation medium, the photosensitive deformation medium and the branch optical fibers are arranged on the storage substrate, the optical fiber codes of N photosensitive storage units are different, the photosensitive deformation medium can be excited into different forms according to different light intensities, and the forms comprise an initial flat state capable of reflecting light waves and a concave-convex state incapable of reflecting light waves; and the light wave collector is connected between the input end of the circulator and the receiving end of the high-speed main control chip.
The all-optical storage system based on optical fiber coding according to the embodiment of the first aspect of the present invention has at least the following beneficial effects: the scheme utilizes the optical identification characteristic of optical fiber coding to realize the coding of the storage unit, realizes the existence or non-existence state of the storage unit by the deformation of the photosensitive material, and further realizes the all-optical coding storage.
According to some embodiments of the first aspect of the present invention, the tunable pulsed light source includes a light source substrate, and a control chip, a light emitting chip, a light source optical fiber, a heating plate, and a temperature measuring sensor disposed on the light source substrate, where the control chip is electrically connected to the light emitting chip, the heating plate, the temperature measuring sensor, and the high-speed main control chip, the light source optical fiber is connected to a light emitting end of the light emitting chip and an input end of the circulator, and is provided with a narrow-band transmission fiber grating, and the installation positions of the heating plate and the temperature measuring sensor correspond to the narrow-band transmission fiber grating.
According to some embodiments of the first aspect of the present invention, the optical fiber code includes a filtering fiber grating, a plurality of coding element fiber gratings with the same center wavelength and arranged at intervals, which are sequentially arranged on the branch optical fiber, and the spacing between the filtering fiber grating and the first coding element fiber grating is fixed, and the spacing between the plurality of coding element fiber gratings is k × L0, where k is an integer between 1 and 9, and L0 is a basic spacing.
According to some embodiments of the first aspect of the present invention, the filter fiber grating is spaced apart from the first coded fiber grating by L0.
According to some embodiments of the first aspect of the present invention, the photosensitive deformation medium is a polymer mixture of a polyphthalamide.
According to a second aspect of the present invention, an all-optical storage method based on optical fiber coding is applied to the all-optical storage system, and the all-optical storage method includes the following steps:
initially scanning the storage unit codes of the photosensitive storage unit, constructing a storage list, and forming storage unit codes by using the code values of the optical fiber codes and corresponding center wavelengths;
memory cell encoding write: switching the initial flat state of the photosensitive deformation medium to a concave-convex state;
reading the code of the storage unit: determining whether data is written or not by detecting whether the photosensitive deformation medium can reflect light waves or not, and recording the data in the storage list;
memory cell code reset: and restoring the deformed photosensitive deformation medium to an initial flat state.
The all-optical storage method based on optical fiber coding according to the embodiment of the second aspect of the invention has at least the following beneficial effects: the scheme utilizes the optical identification characteristic of optical fiber coding to realize the coding of the storage unit, realizes the existence or non-existence state of the storage unit by the deformation of the photosensitive material, and further realizes the all-optical coding storage.
According to some embodiments of the second aspect of the present invention, the initial scanning of the memory cell codes of the photosensitive memory cells comprises the steps of:
the high-speed main control chip sends the light-emitting instruction to the tunable pulse light source, and the tunable pulse light source outputs light waves;
the light waves enter the trunk optical fiber and the optical splitter through the circulator, then enter the branch optical fiber through the optical splitter and act on the optical fiber codes;
the optical fiber codes reflect light waves containing code values, and the light waves are transmitted to the light wave collector through the branch optical fibers, the light splitter, the trunk optical fibers and the circulator;
the high-speed main control chip synchronously acquires the reflected light waves acquired by the light wave acquisition device and analyzes the coded values and the corresponding central wavelengths.
According to some embodiments of the second aspect of the present invention, the memory cell encoded write comprises the steps of:
selecting a photosensitive storage unit to which data needs to be written according to the storage list;
acquiring the coded value and the corresponding central wavelength, and calculating the pulse time and the light intensity which can switch the initial flat state of the photosensitive deformation medium into a concave-convex state;
the high-speed main control chip sends the light emitting instruction to the tunable pulse light source according to the central wavelength and the calculated pulse time and light intensity so that the tunable pulse light source outputs corresponding light waves;
the light waves are encoded by the circulator, the trunk optical fiber, the optical splitter, the branch optical fiber and the optical fiber and act on the photosensitive deformation medium, and the initial flat state of the photosensitive deformation medium is switched into a concave-convex state.
According to some embodiments of the second aspect of the present invention, the memory cell code reading comprises the following steps
The high-speed main control chip sends the light-emitting instruction to the tunable pulse light source;
the tunable pulse light source outputs light waves which are encoded by the circulator, the trunk optical fiber, the optical splitter, the branch optical fiber and the optical fiber and act on the photosensitive deformation medium;
and the high-speed main control chip determines whether data is written according to whether the reflected light waves exist, the reflected light waves represent that no data is written, and the non-reflected light waves represent that the data is written and are recorded in the storage list.
According to some embodiments of the second aspect of the present invention, the memory cell code reset comprises the steps of:
selecting a photosensitive storage unit to be reset according to the storage list;
acquiring the coding value and the corresponding central wavelength, and calculating the pulse time and the light intensity which can restore the deformed photosensitive deformation medium to the initial flat state;
the high-speed main control chip sends the light emitting instruction to the tunable pulse light source according to the central wavelength and the calculated pulse time and light intensity so that the tunable pulse light source outputs corresponding light waves;
the light waves pass through the circulator, the trunk optical fiber, the optical splitter, the branch optical fiber and the optical fiber for encoding and act on the photosensitive deformation medium in the concave-convex state, so that the light waves are saturated and released to restore the initial flat state.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of an all-optical memory system according to an embodiment of the first aspect of the present invention;
FIG. 2 is a schematic diagram of a tunable pulsed optical source according to an embodiment of the first aspect of the present invention;
FIG. 3 is a schematic structural diagram of a tunable pulsed light source according to an embodiment of the first aspect of the present invention;
FIG. 4 is a schematic diagram of an optical fiber encoding structure according to an embodiment of the first aspect of the present invention;
FIG. 5 is a schematic diagram of a structure of a photosensitive memory cell according to an embodiment of the first aspect of the present invention;
FIG. 6 is a flow chart of an all-optical storage method according to a second embodiment of the present invention;
FIG. 7 is a schematic diagram illustrating an initial scanning process of memory cell codes according to a second embodiment of the present invention;
FIG. 8 is a schematic diagram illustrating a memory cell encoding write process according to a second embodiment of the present invention;
FIG. 9 is a schematic diagram illustrating a memory cell encoding read process according to a second embodiment of the present invention;
FIG. 10 is a diagram illustrating a memory cell code reset process according to a second embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1, an optical fiber coding-based all-optical storage system according to an embodiment of a first aspect of the present invention includes: the system comprises a high-speed main control chip 100, a tunable pulse light source 200, a circulator 300, a light splitter 400, a photosensitive storage unit 500 and a light wave collector 600.
The tunable pulsed light source 200 is connected to the high-speed main control chip 100, and is configured to output an optical wave according to a light emitting instruction of the high-speed main control chip 100, where the light emitting instruction includes a light emitting center wavelength, a pulse time, and an optical wave intensity;
the circulator 300 is used for realizing optical wave transmission according to a path, and an input end of the circulator is connected with an output end of the tunable pulse light source 200, and an output end of the circulator is connected with a trunk optical fiber 700; the optical splitter 400 has N optical splitters 400 connected in series to the main optical fiber 700, a splitting end of the optical splitter 400 is connected to a branch optical fiber 800, and the optical wave branching ratio of the optical splitter 400 is preferably 99.5 with reference to the prior art, that is, 0.5% of optical waves are input to each 500 struts of the photosensitive storage unit;
the corresponding photosensitive storage units 500 are also provided with N, and are connected to the branch optical fibers 800 of the optical splitter 400 in a one-to-one correspondence manner; as shown in fig. 5, the photosensitive storage unit 500 includes a storage substrate 510, a photosensitive deformation medium 520, and a fiber code 530, the fiber code 530 is repeatedly engraved on the branch optical fiber 800, the end of the branch optical fiber 800 is connected to the photosensitive deformation medium 520, the photosensitive deformation medium 520 and the branch optical fiber 800 are disposed on the storage substrate 510, the fiber codes 530 of N photosensitive storage units 500 are different, the photosensitive deformation medium 520 can be excited into different forms according to different light intensities, and the forms include an initial flat state of a reflective light wave and a concave-convex state of an non-reflective light wave; the optical wave collector 600 is connected between the input end of the circulator 300 and the receiving end of the high-speed main control chip 100.
According to the scheme, the high-speed main control chip 100 sends a light-emitting instruction to the tunable pulse light source 200, wherein the light-emitting instruction comprises a light-emitting center wavelength, pulse time and light wave intensity, and then the tunable pulse light source 200 outputs corresponding light waves; the light wave enters the trunk optical fiber 700 and the optical splitter 400 through the circulator 300, enters the branch optical fiber 800 through the optical splitter 400, and acts on the optical fiber code 530; the optical fiber code 530 reflects the light wave containing the code value, and the light wave passes through the branch optical fiber 800, the optical splitter 400, the trunk optical fiber 700 and the circulator 300 to the light wave collector 600; the high-speed main control chip 100 synchronously acquires the reflected light waves acquired by the light wave acquisition device 600, and analyzes the code value and the corresponding central wavelength of the optical fiber code 530, so that the optical fiber code 530 is used for realizing the coding address of the all-optical storage unit, and different light intensities are controlled to act on the photosensitive deformation medium 520 to be excited into different forms, namely the initial flat state of the reflected light waves and the concave-convex state of the non-reflected light waves, so that the change of the storage state is realized by the deformation of the photosensitive material, and further the storage of the all-optical coding is realized.
As shown in fig. 2 and 3, in some embodiments of the first aspect of the present invention, the tunable pulsed light source 200 includes a light source substrate 210, and a control chip 220, a light emitting chip 230, a light source optical fiber 240, a heating sheet 250 and a temperature measuring sensor 260 disposed on the light source substrate 210, where the control chip 220 is electrically connected to the light emitting chip 230, the heating sheet 250, the temperature measuring sensor 260 and the high-speed main control chip 100, the light source optical fiber 240 is connected to a light emitting end of the light emitting chip 230 and an input end of the circulator 300 and is provided with a narrow-band transmission fiber grating 270, and the installation positions of the heating sheet 250 and the temperature measuring sensor 260 correspond to the narrow-band transmission fiber grating 270.
The light source substrate 210 is a silicon substrate, the light emitting chip 230 receives the pulse driving current excited light of the control chip 220 and outputs light waves outwards through optical fibers, the heating sheet 250 heats the transmission fiber grating in the optical fibers, the temperature measuring sensor 260 measures the temperature of the tunable pulse light source 200 in real time, and the control chip 220 realizes data acquisition and control of the light emitting chip 230, the heating sheet 250 and the temperature measuring sensor and realizes data interaction with the high-speed main control chip 100 and instruction receiving;
when the LED lamp works, different currents are output to the light emitting chip 230 to control the light emitting chip 230 to output light waves with different light intensities; the heating plate 250 and the temperature measuring sensor 260 are controlled to realize the change of the center wavelength of the narrow-band transmission fiber grating 270, so that the transmission of light waves with different center wavelengths is realized; the control chip 220 modulates the temperature required by the narrow-band transmission fiber grating 270 according to the instruction of the high-speed main control chip 100, wherein the modulation parameter is the central wavelength variation value f =0.01 nm/DEG C, so that the required transmission light wave central wavelength modulation is realized; after the modulation of the central wavelength is completed, a driving pulse current is output to the light emitting chip 230 according to the required light intensity and pulse, and the light emitting chip 230 is excited by the excitation light; the control chip 220 synchronously sends a light emitting timing sequence to the high-speed main control chip 100 to inform that the high-speed main control chip 100 emits light, the high-speed main control chip 100 receives a light emitting starting instruction, and calculates a time difference between the data collected by the light wave collector 600 to calculate a length corresponding to the data.
Further, as shown in fig. 4, in some embodiments of the first aspect of the present invention, the optical fiber code 530 includes a filtering fiber grating 531 and a plurality of code element fiber gratings 532 with the same central wavelength and arranged at intervals, which are sequentially arranged on the branch optical fiber 800, a distance between the filtering fiber grating 531 and the first code element fiber grating 532 is fixed, and a central wavelength of a transmission part of the light wave is consistent with that of the code element fiber grating 532, so that only the light wave with the central wavelength of the code element fiber grating 532 can normally penetrate through the transmission part; the pitch of the coded fiber gratings 532 is k × L0, where k is an integer between 1 and 9, L0 is a basic interval, and the coded fiber gratings 530 are combined to form the fiber code 530 at different pitches, and the fiber code 530 realizes the incidence of a specified central wavelength and the reflection of a corresponding central wavelength light wave.
Furthermore, in some embodiments of the first aspect of the present invention, the filtering fiber grating 531 and the first code element fiber grating 532 have a spacing L0, and this fixed spacing is convenient for not occupying code values.
Preferably, in some embodiments of the first aspect of the present invention, the photosensitive deformation medium 520 is a polymer mixture of polyimide, and according to the common knowledge, such polymer material has the capability of light induced deformation, and can be deformed by light induced stimulation, and the energy is released and returns to the initial state after saturated stimulation; which is connected with the branch optical fiber 800, and when the light wave passing through the branch optical fiber 800 is inputted, the flat surface thereof reflects the light wave; when the intensity and time of the light wave reach the excited state, the material of the light wave is deformed in an uneven way, and the light wave is scattered when being injected and does not reflect the light wave any more; when the intensity and time of the light wave are increased again to reach the excited saturation state, the material releases energy and recovers the original flat surface.
In this embodiment, the central wavelengths used by each optical fiber code 530 are different, so as to realize the optical fiber code 530 corresponding to the input of the multi-wavelength optical wave; which in turn coincides with the center wavelength of the light wave transmitted by tunable pulsed light source 200.
The distance between the fiber gratings 532 of each code element takes L0 as a multiple of a cardinal number, and the L0 is related to the minimum pulse time r of the tunable pulse light source 200 and the frequency m of the light wave collector 600; wherein the minimum pulse time r of the tunable pulsed light source 200 is related to the frequency n of the high-speed main control chip 100, i.e. r =1/n; m is not less than 2*n to meet the requirement of complete collection of transmitted pulse light waves; l0 ≧ (1/m) × (λ), where λ is the speed of light, and the larger m, the smaller L0;
when the reflected light of each encoding element fiber grating 532 of the fiber encoding 530 is collected by the light wave collector 600, the adjacent interval encoding value = integer (distance between adjacent/L0), and the value is between 1 and 9, and the finally formed encoding value is an ordering of a plurality of integers, such as: the 4 optical fiber codes 530 with the center wavelength of 1515.51nm are combined, the distance between the elements is 3, 4 and 7 respectively, the code value of the final optical fiber code 530 is 347, and the code of the storage unit is 151551347.
When the photosensitive storage unit 500 is selected, the decomposition is performed according to the code of the photosensitive storage unit 500, for example, the code of the storage unit is 151551347, that is, the code value of the optical fiber code 530 with the center wavelength of 1515.51nm is 347. The system controls the tunable pulse laser to send 1515.51nm central wavelength light waves to access the 151551347 storage unit;
as shown in fig. 6, an all-optical storage method based on optical fiber coding 530 according to a second embodiment of the present invention is applied to the above-mentioned all-optical storage system, and includes the following steps:
initially scanning the storage unit codes of the photosensitive storage unit 500, constructing a storage list, and forming storage unit codes by using the code values of the optical fiber codes 530 and the corresponding center wavelengths;
memory cell encoding write: switching the initial flat state of the photosensitive deformation medium 520 to a concave-convex state;
reading the code of the storage unit: determining whether data is written by detecting whether the photosensitive deformation medium 520 can reflect light waves, and recording the data in the storage list;
memory cell code reset: and restoring the deformed photosensitive deformation medium 520 to an initial flat state.
The scheme utilizes the optical identification characteristic of the optical fiber code 530 to realize the coding of the storage unit, realizes the existence or non-existence of the storage unit by the deformation of the photosensitive material, and further realizes the all-optical coding storage.
In some embodiments of the second aspect of the present invention, as shown in fig. 7, the initial scanning of the memory cell codes of the photosensitive memory cell 500 comprises the following steps:
the high-speed main control chip 100 sends the light emitting instruction to the tunable pulsed light source 200, where the light emitting instruction includes a light emitting center wavelength, a pulse time, and a light wave intensity, and the tunable pulsed light source 200 outputs a corresponding light wave;
the light wave enters the trunk optical fiber 700 and the optical splitter 400 through the circulator 300, enters the branch optical fiber 800 through the optical splitter 400, and acts on the optical fiber code 530; the center wavelength of the fiber code 530 of each photosensitive storage unit 500 is different; each optical fiber code 530 comprises a filtering optical fiber grating 531 and a plurality of code element optical fiber gratings 532 with the same center wavelength and different intervals, the filtering optical fiber grating 531 can only pass through the center wavelength of the following code element optical fiber grating 532, the code element optical fiber gratings 532 reflect corresponding light waves, the same optical fiber gratings with different intervals are used as code elements, and code values are formed by the mutual intervals;
the optical fiber code 530 reflects the light wave containing the code value, and the light wave passes through the branch optical fiber 800, the optical splitter 400, the main optical fiber 700 and the circulator 300 to the light wave collector 600;
the high-speed main control chip 100 synchronously acquires the reflected light waves acquired by the light wave acquirer 600, analyzes the code values and the corresponding center wavelengths, and then constructs a storage list, so that the code values of the optical fiber codes 530 and the corresponding center wavelengths form storage unit codes.
In some embodiments of the second aspect of the present invention, as shown in fig. 8, the memory cell encoded write comprises the steps of:
selecting a photosensitive storage unit 500 to which data needs to be written according to the storage list;
acquiring the code value and the corresponding central wavelength, and calculating the pulse time and the light intensity which can switch the initial flat state of the photosensitive deformation medium 520 into a concave-convex state;
the high-speed main control chip 100 sends the light emitting instruction to the tunable pulsed light source 200 according to the central wavelength and the calculated pulse time and light intensity, so that the tunable pulsed light source 200 outputs a corresponding light wave;
the light waves pass through the circulator 300, the trunk optical fiber 700, the optical splitter 400, the branch optical fiber 800 and the optical fiber code 530 and act on the photosensitive deformation medium 520, and the initial flat state of the photosensitive deformation medium 520 is switched to a concave-convex state, so that the writing of the storage unit code is completed.
In some embodiments of the second aspect of the present invention, as shown in FIG. 9, the memory cell code reading comprises the following steps
The high-speed main control chip 100 sends the light emitting instruction to the tunable pulse light source 200, wherein the light emitting instruction comprises light emitting center wavelength, pulse time and light wave intensity;
the light wave output by the tunable pulse light source 200 passes through the circulator 300, the trunk optical fiber 700, the optical splitter 400, the branch optical fiber 800 and the optical fiber code 530 and acts on the photosensitive deformation medium 520;
the high-speed main control chip 100 determines whether data is written according to whether a reflected light wave exists, wherein the presence of the reflected light wave represents that no data is written, and the absence of the reflected light wave represents that data is written, and the data is recorded in the storage list.
In some embodiments of the second aspect of the present invention, as illustrated in fig. 10, the memory cell code reset comprises the steps of:
selecting a photosensitive storage unit 500 to be reset according to the storage list;
acquiring the code value and the corresponding center wavelength, and calculating the pulse time and the light intensity which can restore the deformed photosensitive deformation medium 520 to the initial flat state;
the high-speed main control chip 100 sends the light emitting instruction to the tunable pulsed light source 200 according to the central wavelength and the calculated pulse time and light intensity, so that the tunable pulsed light source 200 outputs a corresponding light wave;
the light waves pass through the circulator 300, the trunk optical fiber 700, the optical splitter 400, the branch optical fiber 800 and the optical fiber code 530 and act on the photosensitive deformation medium 520 in the concave-convex state, so that the light waves are saturated and released to recover the initial flat state, and the resetting of the code of the storage unit is completed.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An all-optical storage system based on optical fiber coding, comprising:
a high-speed main control chip;
the tunable pulse light source is connected with the high-speed main control chip and used for outputting light waves according to the light emitting instructions of the high-speed main control chip, and the light emitting instructions comprise light emitting center wavelength, pulse time and light wave intensity;
the circulator is used for realizing optical wave transmission according to a path, the input end of the circulator is connected with the output end of the tunable pulse light source, and the output end of the circulator is connected with a trunk optical fiber;
the N optical splitters are connected in series with the trunk optical fiber, and the light splitting ends of the optical splitters are connected with branch optical fibers;
n photosensitive storage units which are connected to the branch optical fibers of the optical splitter in a one-to-one correspondence manner; the photosensitive storage unit comprises a storage substrate, a photosensitive deformation medium and optical fiber codes, wherein the optical fiber codes are repeatedly engraved on the branch optical fibers, the tail ends of the branch optical fibers are connected with the photosensitive deformation medium, the photosensitive deformation medium and the branch optical fibers are arranged on the storage substrate, the optical fiber codes of N photosensitive storage units are different, the photosensitive deformation medium can be excited into different forms according to different light intensities, and the forms comprise an initial flat state capable of reflecting light waves and a concave-convex state incapable of reflecting light waves;
and the light wave collector is connected between the input end of the circulator and the receiving end of the high-speed main control chip.
2. The all-optical storage system based on optical fiber coding according to claim 1, characterized in that: the tunable pulse light source comprises a light source substrate, a control chip, a light emitting chip, a light source optical fiber, a heating sheet and a temperature measuring sensor, wherein the control chip, the light emitting chip, the heating sheet, the temperature measuring sensor and the high-speed main control chip are arranged on the light source substrate, the control chip is respectively electrically connected with the light emitting chip, the heating sheet, the temperature measuring sensor and the high-speed main control chip, the light source optical fiber is respectively connected with a light emitting end of the light emitting chip and an input end of the circulator and is provided with a narrow-band transmission optical fiber grating, and the installation positions of the heating sheet and the temperature measuring sensor correspond to the narrow-band transmission optical fiber grating.
3. The all-optical storage system based on optical fiber coding according to claim 1 or 2, characterized in that: the optical fiber code comprises a filtering fiber grating and a plurality of coding element fiber gratings which have the same central wavelength and are arranged at intervals in sequence on the branch optical fiber, the distance between the filtering fiber grating and the first coding element fiber grating is fixed, the distance between the plurality of coding element fiber gratings is k L0, wherein k is an integer between 1 and 9, and L0 is a basic interval.
4. The all-optical storage system based on optical fiber coding according to claim 3, characterized in that: and the distance between the filtering fiber grating and the first coding element fiber grating is L0.
5. The all-optical storage system based on optical fiber coding according to claim 1, characterized in that: the photosensitive deformation medium is a polymer mixture of polyththalimide.
6. An all-optical storage method based on optical fiber coding is characterized in that: the all-optical storage system applied to any one of claims 1 to 5, wherein the all-optical storage method comprises the following steps:
initially scanning the storage unit codes of the photosensitive storage unit, constructing a storage list, and forming storage unit codes by using the code values of the optical fiber codes and corresponding center wavelengths;
memory cell encoding write: switching the initial flat state of the photosensitive deformation medium into a concave-convex state;
reading the code of the storage unit: determining whether data is written or not by detecting whether the photosensitive deformation medium can reflect light waves or not, and recording the data in the storage list;
memory cell code reset: and restoring the deformed photosensitive deformation medium to an initial flat state.
7. The all-optical storage method based on optical fiber coding according to claim 6, characterized in that: the initial scanning of the memory cell code of the photosensitive memory cell comprises the following steps:
the high-speed main control chip sends the light-emitting instruction to the tunable pulse light source, and the tunable pulse light source outputs light waves;
the light waves enter the trunk optical fiber and the optical splitter through the circulator, then enter the branch optical fiber through the optical splitter and act on the optical fiber codes;
the optical fiber codes reflect light waves containing code values, and the light waves are transmitted to the light wave collector through the branch optical fibers, the light splitter, the trunk optical fibers and the circulator;
the high-speed main control chip synchronously acquires the reflected light waves acquired by the light wave acquisition device and analyzes the coded values and the corresponding central wavelengths.
8. The all-optical storage method based on optical fiber coding according to claim 6, characterized in that: the memory cell encoding writing comprises the following steps:
selecting a photosensitive storage unit in which data needs to be written according to the storage list;
acquiring the code value and the corresponding central wavelength, and calculating the pulse time and the light intensity which can switch the initial flat state of the photosensitive deformation medium into a concave-convex state;
the high-speed main control chip sends the light emitting instruction to the tunable pulse light source according to the central wavelength and the calculated pulse time and light intensity so that the tunable pulse light source outputs corresponding light waves;
the light waves are encoded by the circulator, the trunk optical fiber, the optical splitter, the branch optical fiber and the optical fiber and act on the photosensitive deformation medium, and the initial flat state of the photosensitive deformation medium is switched into a concave-convex state.
9. The all-optical storage method based on optical fiber coding according to claim 6, wherein: the memory cell code reading comprises the following steps
The high-speed main control chip sends the light-emitting instruction to the tunable pulse light source;
the tunable pulse light source outputs light waves which are encoded by the circulator, the trunk optical fiber, the optical splitter, the branch optical fiber and the optical fiber and act on the photosensitive deformation medium;
and the high-speed main control chip determines whether data is written according to whether the reflected light waves exist, the reflected light waves represent that no data is written, and the non-reflected light waves represent that the data is written and are recorded in the storage list.
10. The all-optical storage method based on optical fiber coding according to claim 6, characterized in that: the memory cell code reset comprises the following steps:
selecting a photosensitive storage unit to be reset according to the storage list;
acquiring the coding value and the corresponding central wavelength, and calculating the pulse time and the light intensity which can restore the deformed photosensitive deformation medium to the initial flat state;
the high-speed main control chip sends the light-emitting instruction to the tunable pulse light source according to the central wavelength and the calculated pulse time and light intensity so that the tunable pulse light source outputs corresponding light waves;
the light waves pass through the circulator, the trunk optical fiber, the optical splitter, the branch optical fiber and the optical fiber for encoding and act on the photosensitive deformation medium in the concave-convex state, so that the light waves are saturated and released to restore the initial flat state.
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