A point-to-multiple all-optical communication system and method based on optical fiber coded address code

Abstract

The present invention discloses a point-to-multiple all-optical communication system and method based on fiber coded address codes, the system includes: multiple optical splitters, the multiple optical splitters are connected in series through a trunk optical fiber, and the optical splitting end of each optical splitter is connected to a branch optical fiber; multiple communication terminals, the multiple communication terminals are connected to the branch optical fibers of the multiple optical splitters in a one-to-one correspondence; each communication terminal has an optical fiber code set on the branch optical fiber, the optical fiber code is composed of a plurality of transmission fiber gratings with different central wavelengths, and the optical fiber code of each communication terminal is different; a communication master station is connected to the multiple optical splitters connected in series, and is used to identify the optical fiber code and communicate with the communication terminal. This scheme utilizes the optically identifiable characteristics of optical fiber coding to realize an all-optical communication system with a single-point to multi-point communication structure, effectively solving the problems of data overhead, long conversion time, high energy consumption, etc. of the traditional single-point to multi-point optical fiber communication system based on optical splitters.

Description

Technical Field

[0001] The present invention relates to the field of optical fiber communication, and in particular to a point-to-multiple all-optical communication system and method based on optical fiber encoding address codes. Background Art

[0002] The traditional optical communication system using optical splitters is PON communication, which can use a single-point to multi-point optical communication system, which uses a master station to broadcast data, and the terminal receives the optical signal and converts the optical signal into a data signal before confirming whether it is required by the terminal. This communication method wastes data overhead, takes a long time to convert, and increases terminal energy consumption. Therefore, a communication system and method for directly realizing optical signal selection is needed. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a point-to-multiple all-optical communication system based on optical fiber coded address codes, which can be identifiably stored.

[0004] According to the first aspect of the present invention, a point-to-multiple all-optical communication system based on fiber-coded address codes comprises: a plurality of optical splitters, wherein the plurality of optical splitters are connected in series through a trunk optical fiber, and the optical splitting end of each of the optical splitters is connected to a branch optical fiber; a plurality of communication terminals, wherein the plurality of communication terminals are connected one-to-one to the branch optical fibers of the plurality of optical splitters; each of the communication terminals has an optical fiber code arranged on the branch optical fiber, wherein the optical fiber code is composed of a plurality of transmission optical fiber gratings with different central wavelengths, and the optical fiber code of each communication terminal is different; and a communication master station, which is connected to the plurality of optical splitters connected in series and is used to identify the optical fiber code and communicate with the communication terminal.

[0005] A point-to-multipoint all-optical communication system based on fiber-coded address codes according to an embodiment of the first aspect of the present invention has at least the following beneficial effects: This scheme utilizes the optically identifiable characteristics of fiber coding to realize an all-optical communication system with a single-point to multi-point communication structure, and effectively solves the problems of data overhead, long conversion time, high energy consumption, etc. of traditional single-point to multi-point fiber-optic communication systems based on splitters.

[0006] According to some embodiments of the first aspect of the present invention, the communication terminal includes a terminal processing chip, multiple first pulse light sources, a first wavelength division multiplexer, a first circulator, and a first light wave collector. The terminal processing chip is respectively connected to the multiple first pulse light sources and the first light wave collector. The number and center wavelength of the first pulse light sources are consistent with those of the transmission type fiber gratings. The output ends of the multiple first pulse light sources are all connected to the first wavelength division multiplexer. The output end of the first wavelength division multiplexer is connected to the input end of the first circulator. The output end of the first circulator is connected to the branch optical fiber, and the light wave reflection end of the first circulator is connected to the first light wave collector.

[0007] According to some embodiments of the first aspect of the present invention, the communication master station includes a master station processing chip, n second pulse light sources, a second wavelength division multiplexer, a second circulator, and a second light wave collector. The master station processing chip is respectively connected to the n second pulse light sources and the second light wave collector. The number n of the second pulse light sources is consistent with the number of central wavelengths of the transmission fiber gratings. The output ends of the n second pulse light sources are all connected to the second wavelength division multiplexer, the output end of the second wavelength division multiplexer is connected to the input end of the second circulator, the output end of the second circulator is connected to the branch optical fiber, and the light wave reflection end of the second circulator is connected to the second light wave collector.

[0008] According to some embodiments of the first aspect of the present invention, the splitting ratio of the trunk optical fiber to the branch optical fiber of the splitter is 99:1.

[0009] According to a second aspect of the present invention, a point-to-multiple all-optical communication method based on optical fiber coded address codes is applied to the all-optical storage system. The all-optical storage method comprises the following steps:

[0010] Different pulse widths are defined for the master station initialization measurement light wave, the first data light wave sent downward by the master station, and the second data light wave sent upward by the terminal;

[0011] The communication master station performs initialization measurement to obtain the optical fiber coding information of the plurality of communication terminals and compiles a communication routing table;

[0012] The communication master station broadcasts data to the plurality of communication terminals or sends a first data optical wave to a designated communication terminal according to the communication routing table, and the communication terminal receives and parses the first data optical wave;

[0013] The communication terminal sends a second data light wave to the communication main station, and the communication main station identifies the communication terminal by parsing the optical fiber coding information contained in the second data light wave, and completes the data upload of the communication terminal.

[0014] A point-to-multipoint all-optical communication method based on fiber-coded address codes according to an embodiment of the second aspect of the present invention has at least the following beneficial effects: This scheme utilizes the optically identifiable characteristics of fiber coding to implement an all-optical communication system method with a single-point to multi-point communication structure, effectively solving the problems of data overhead, long conversion time, high energy consumption, etc. of traditional single-point to multi-point fiber-optic communication systems based on splitters.

[0015] According to some embodiments of the second aspect of the present invention, the pulse widths of the master station initialization measurement light wave, the first data light wave, and the second data light wave are k, k / 16, and k / 8, respectively.

[0016] According to some embodiments of the second aspect of the present invention, the communication master station performs initialization measurement to obtain the optical fiber coding information of the plurality of communication terminals, and compiles a communication routing table, comprising the following steps:

[0017] The communication master station sends an initialization measurement light wave, and the initialization measurement light wave passes through the trunk optical fiber, the optical splitter, and the branch optical fiber to the communication terminal;

[0018] The optical fiber coding of the communication terminal reflects the light wave containing the optical fiber coding information to the communication main station;

[0019] The communication master station parses out the optical fiber coding information, light intensity, and distance according to the received reflected light waves, and compiles a communication routing table according to the optical fiber coding information, light intensity, and distance.

[0020] According to some embodiments of the second aspect of the present invention, the communication master station broadcasts data to a plurality of the communication terminals or sends a first data optical wave to a designated communication terminal according to the communication routing table, and the communication terminal receives and parses the first data optical wave, including the following steps:

[0021] Select to broadcast data to a plurality of the communication terminals or send a first data light wave to a designated communication terminal, wherein the first data light wave is composed of a plurality of pulse light waves and the pulse interval time is compiled in binary format, and the plurality of pulse light waves are consistent with the optical fiber coding center wavelength of the selected communication terminal;

[0022] The optical fiber encoding of the communication terminal reflects and transmits the first data light wave;

[0023] The reflected first data light wave is transmitted back to the communication main station, and the communication main station analyzes the reflected first data light wave, and verifies the first data light wave according to the analyzed central wavelength, pulse width, and pulse interval time;

[0024] The first data light wave is transmitted to the communication terminal, and the communication terminal receives the first data light wave, selects the spectrum pulses with the central wavelength and pulse width that conform to its own optical fiber coding, and parses the spectrum pulses into data information according to binary rules.

[0025] According to some embodiments of the second aspect of the present invention, the communication terminal sends a second data light wave to the communication main station, and the communication main station identifies the communication terminal by parsing the optical fiber coding information contained in the second data light wave, including the following steps:

[0026] The communication terminal sends a second data light wave to the communication master station, wherein the second data light wave is composed of a plurality of pulse light waves and the pulse interval time is arranged in binary format, and the plurality of pulse light waves are consistent with the optical fiber coding center wavelength of the communication terminal;

[0027] The optical fiber encoding of the communication terminal reflects and transmits the second data light wave;

[0028] The reflected second data light wave is transmitted back to the communication terminal, and the communication terminal analyzes the reflected second data light wave and verifies the second data light wave according to the analyzed central wavelength, pulse width, and pulse interval time;

[0029] The transmitted second data light wave is transmitted to the communication main station, and the communication main station receives the transmitted second data light wave, screens out the spectral pulses with the central wavelength and pulse width that meet the communication routing table, and parses the spectral pulses into data information according to binary rules; for the pulse light waves whose central wavelength is not in the communication routing table, the terminal information is added to the communication routing table.

[0030] According to some embodiments of the second aspect of the present invention, before the communication terminal sends the second data light wave to the communication master station, it first sends a registration light wave, and the registration light wave is a single pulse light wave.

[0031] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0033] Figure 1 A schematic diagram of a point-to-multiple all-optical communication system according to an embodiment of the first aspect of the present invention;

[0034] Figure 2 A schematic diagram of a communication terminal according to an embodiment of the first aspect of the present invention;

[0035] Figure 3 A schematic diagram of the optical fiber coding structure of an embodiment of the first aspect of the present invention;

[0036] Figure 4 A schematic diagram of a fiber coded spectrum according to an embodiment of the first aspect of the present invention;

[0037] Figure 5 A schematic diagram of a communication master station according to an embodiment of the first aspect of the present invention;

[0038] Figure 6 A schematic diagram of the time domain spectrum of light waves collected by a communication master station according to the first aspect of the present invention;

[0039] Figure 7 for Figure 6 The spectrum corresponding to the peak of the time domain spectrum;

[0040] Figure 8 A schematic flow chart of a point-to-multiple all-optical communication method according to an embodiment of the second aspect of the present invention;

[0041] Fig. 9 A schematic diagram of the initialization measurement process of an embodiment of the second aspect of the present invention;

[0042] Fig.10 This is a data flow chart of a master station broadcasting or sending information to a designated terminal according to an embodiment of the second aspect of the present invention;

[0043] Fig.11 This is a flow chart of information data sent from a terminal to a main station according to an embodiment of the second aspect of the present invention. DETAILED DESCRIPTION

[0044] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0045] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 therefore should not be understood as a limitation on the present invention.

[0046] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0047] refer to Figure 1 As shown, a point-to-multiple all-optical communication system based on fiber-coded address codes according to the first aspect of the embodiment of the technical solution includes:

[0048] A plurality of optical splitters 100, wherein the plurality of optical splitters 100 are connected in series via a trunk optical fiber 110, and a branch optical fiber 120 is connected to a light splitting end of each optical splitter 100;

[0049] A plurality of communication terminals 200, each of which is connected to the branch optical fibers 120 of the plurality of optical splitters 100 in a one-to-one correspondence; each of the communication terminals 200 has an optical fiber code 201 disposed on the branch optical fiber 120, such as Figure 3 , Figure 4 As shown, the fiber coding 201 is composed of a plurality of transmissive fiber Bragg gratings with different central wavelengths, and the fiber coding 201 of each communication terminal 200 is different; the transmissive fiber Bragg grating shows that only the light wave corresponding to the central wavelength can penetrate, and the rest of the light waves are reflected. A plurality of transmissive fiber Bragg gratings with different central wavelengths form a complete transmission spectrum, so that only the corresponding part of the central wavelength can penetrate, and the rest are reflected. The number of central wavelengths determines the number of pulse light sources;

[0050] The communication main station 300 is connected to the plurality of said optical splitters 100 connected in series, and is used to identify the optical fiber coding and communicate with the communication terminal 200, and to construct an initialization routing table for the access terminal, to realize downward communication transmission and data verification for the terminal, and to realize information collection for the new access terminal.

[0051] During operation, the communication main station 300 sends an initialization measurement light wave to multiple communication terminals 200. The fiber optic coding of each communication terminal 200 reflects a light wave containing fiber optic coding information to the communication main station 300. The communication main station 300 analyzes the received light wave information and identifies the corresponding fiber optic coding information, central wavelength, light intensity and distance, thereby completing the identification of the communication terminal 200 and establishing a communication routing relationship. This solution utilizes the optically identifiable characteristics of fiber optic coding to realize an all-optical communication system with a single-point to multi-point communication structure, effectively solving the problems of data overhead, long conversion time, high energy consumption, etc. of the traditional single-point to multi-point fiber optic communication system based on the optical splitter 100.

[0052] like Figure 2As shown, in some embodiments of the first aspect of the present invention, the communication terminal 200 includes a terminal processing chip 210, multiple first pulse light sources 220, a first wavelength division multiplexer 230, a first circulator 240, and a first light wave collector 250. The terminal processing chip 210 is respectively connected to the multiple first pulse light sources 220 and the first light wave collector 250. The number and center wavelength of the first pulse light sources 220 are consistent with those of the transmission fiber gratings. The output ends of the multiple first pulse light sources 220 are all connected to the first wavelength division multiplexer 230. The output end of the first wavelength division multiplexer 230 is connected to the input end of the first circulator 240. The output end of the first circulator 240 is connected to the branch optical fiber 120. The light wave reflection end of the first circulator 240 is connected to the first light wave collector 250.

[0053] Specifically, the terminal processing chip 210 controls multiple pulse light sources to synchronously send light waves according to a fixed pulse width; when registration information needs to be sent, the corresponding pulse information is only sent once, and when communication data needs to be sent, the corresponding pulse is used to send binary corresponding pulse information; the first wavelength division multiplexer 230 realizes the light wave coupling of multiple narrowband pulse light sources, and outputs a coupled complete light wave; the first circulator 240 realizes the transmission of light waves in a certain direction, and the first light wave collector 250 realizes the collection of light waves, and collects the spectrum information of the light waves input at each time point in real time.

[0054] like Figure 5 As shown, in some embodiments of the first aspect of the present invention, the communication master station 300 includes a master station processing chip 310, n second pulse light sources 320, a second wavelength division multiplexer 330, a second circulator 340, and a second light wave collector 350. The master station processing chip 310 is respectively connected to the n second pulse light sources 320 and the second light wave collector 350. The number n of the second pulse light sources 320 is consistent with the number of central wavelengths of the transmission fiber grating. The output ends of the n second pulse light sources 320 are all connected to the second wavelength division multiplexer 330. The output end of the second wavelength division multiplexer 330 is connected to the input end of the second circulator 340. The output end of the second circulator 340 is connected to the branch optical fiber 120. The light wave reflection end of the second circulator 340 is connected to the second light wave collector 350.

[0055] The main station processing chip 310 independently controls a single or multiple pulse light sources to emit light according to the set pulse bandwidth and interval, and collects the waveform data obtained by the light wave collector in real time, and calculates the distance of the obtained waveform data according to different time points. The transmission fiber grating shows that only the light wave corresponding to the central wavelength can penetrate, and the rest of the light waves are reflected, forming a Figure 6 , Figure 7The peaks shown are analyzed to analyze the waveform data to obtain the corresponding fiber coded wavelength, energy and other information; the second wavelength division multiplexer 330 realizes the light wave coupling of multiple narrowband pulse light sources and outputs a coupled complete light wave; the second circulator 340 realizes the transmission of light waves in a certain direction, and the second light wave collector 350 realizes the collection of light waves and collects the spectrum information of the light waves input at each time point in real time.

[0056] In some embodiments of the first aspect of the present invention, the splitting ratio of the trunk optical fiber 110 and the branch optical fiber 120 of the splitter 100 is 99:1, that is, each communication terminal 200 receives 1% of the incident light, and the splitting ratio can also be adjusted according to actual needs.

[0057] like Figure 8 As shown, a point-to-multiple all-optical communication method based on optical fiber encoding address code according to the second aspect of the present invention is applied to the all-optical storage system. The all-optical storage method comprises the following steps:

[0058] Different pulse widths are defined for the master station initialization measurement light wave, the first data light wave sent downward by the master station, and the second data light wave sent upward by the terminal;

[0059] The communication master station 300 performs initialization measurement to obtain the optical fiber coding information of the plurality of communication terminals 200 and compiles a communication routing table;

[0060] The communication master station 300 broadcasts data to the plurality of communication terminals 200 according to the communication routing table or sends a first data optical wave to a designated communication terminal 200, and the communication terminal 200 receives and analyzes the first data optical wave;

[0061] The communication terminal 200 sends a second data light wave to the communication main station 300 , and the communication main station 300 identifies the communication terminal 200 by parsing the optical fiber coding information contained in the second data light wave, and completes the data upload of the communication terminal 200 .

[0062] This solution uses pulse width to distinguish the types of light waves, avoiding the consumption of information analysis of light waves, and uses fiber coding to send specific light waves from the master station to the terminal. Only complete wavelength combinations can be fully collected by the terminal, thereby realizing addressable all-optical transmission of fiber coding. The optically identifiable characteristics of fiber coding are used to realize the all-optical communication system method of a single-point to multi-point communication structure, effectively solving the problems of data overhead, long conversion time, and high energy consumption of the traditional single-point to multi-point optical fiber communication system based on the optical splitter 100.

[0063] In some embodiments of the second aspect of the present invention, the pulse widths of the master station initialization measurement light wave, the first data light wave, and the second data light wave are k, k / 16, and k / 8, respectively, and the specific pulse widths can also be adjusted according to actual needs.

[0064] like Fig. 9 As shown, in some embodiments of the second aspect of the present invention, the communication master station 300 performs initialization measurement to obtain the fiber coding information of the plurality of communication terminals 200, and compiles a communication routing table including the following steps:

[0065] The communication master station 300 sends an initialization measurement light wave, which passes through the trunk optical fiber 110, the optical splitter 100, and the branch optical fiber 120 to the communication terminal 200; specifically, the master station processing chip 310 drives n pulse light sources at the same time to send an initialization measurement light wave with a pulse of k; the light wave is output to the trunk optical fiber 110 through the second wavelength division multiplexer 330 and the second circulator 340, and the trunk optical fiber 110 transmits the light wave to the optical splitter 100, and part of the light wave is diverted to the communication terminal 200 through the optical splitter 100;

[0066] The optical fiber coding of the communication terminal 200 reflects the light wave containing the optical fiber coding information to the communication master station 300; since the pulse width of the optical wave sent by the master station is k, the maximum width of the time domain reflection peak collected is 2*k, so the collected spectrum is the optical wave reflected by the master station this time;

[0067] The communication master station 300 parses the optical fiber coding information, light intensity, and distance according to the received reflected light wave, and compiles a communication routing table according to the optical fiber coding information, light intensity, and distance.

[0068] like Fig.10 As shown, in some embodiments of the second aspect of the present invention, the communication master station 300 broadcasts data to multiple communication terminals 200 or sends a first data light wave to a designated communication terminal 200 according to the communication routing table, and the communication terminal 200 receives and parses the first data light wave, including the following steps:

[0069] Select to broadcast data to multiple communication terminals 200 or send the first data light wave to a designated communication terminal 200, which is divided into broadcast and designated terminal. If it is broadcast, all light sources are driven; if it is a designated terminal, only the light source combination corresponding to the designated terminal is driven; the first data light wave is composed of multiple pulse light waves and the pulse interval time is compiled in binary, and the multiple pulse light waves are consistent with the optical fiber coding center wavelength of the selected communication terminal 200;

[0070] The optical fiber encoding of the communication terminal 200 reflects and transmits the first data light wave;

[0071] The reflected first data light wave is transmitted back to the communication main station 300, and the communication main station 300 analyzes the reflected first data light wave, and verifies the first data light wave according to the analyzed central wavelength, pulse width, and pulse interval time; the single pulse width is (k / 16), which is inconsistent with the pulse width of the initialization light wave and can be distinguished;

[0072] The first data light wave is transmitted to the communication terminal 200, and the communication terminal 200 receives the first data light wave, selects the spectrum pulses that meet the central wavelength and pulse width of its own optical fiber coding, and parses the spectrum pulses into data information according to the binary rule. If the pulse width is (k / 16), it is communication data; if the pulse width is k, it is discarded.

[0073] like Fig.11 As shown, in some embodiments of the second aspect of the present invention, the communication terminal 200 sends a second data light wave to the communication main station 300, and the communication main station 300 identifies the communication terminal 200 by parsing the optical fiber coding information contained in the second data light wave, including the following steps:

[0074] The communication terminal 200 sends a second data light wave to the communication main station 300, the second data light wave is composed of a plurality of pulse light waves and the pulse interval time is compiled in binary, and the plurality of pulse light waves are consistent with the optical fiber coding center wavelength of the communication terminal 200; specifically, the communication terminal 200 drives a plurality of pulse light sources at the same time, and adopts a data composition with a pulse width of k / 8; the pulse is used as the luminous time, and the interval of the pulse as the base is N*(k / 8), where N is an integer from 1 to 9, to form a binary pulse sequence, the information to be sent is combined and compiled according to the binary sequence and sent, and then the second data light wave is sent by a plurality of light sources at the same time;

[0075] The optical fiber encoding of the communication terminal 200 reflects and transmits the second data light wave;

[0076] The reflected second data light wave is transmitted back to the communication terminal 200, and the communication terminal 200 analyzes the reflected second data light wave and verifies the second data light wave according to the analyzed central wavelength, pulse width, and pulse interval time;

[0077] The transmitted second data light wave is transmitted to the communication main station 300, and the communication main station 300 receives the transmitted second data light wave, screens out the spectral pulses with the central wavelength and pulse width that meet the communication routing table, and parses the spectral pulses into data information according to binary rules; for the pulse light waves whose central wavelength is not in the communication routing table, the terminal information is added to the communication routing table.

[0078] In some embodiments of the second aspect of the present invention, before the communication terminal 200 sends the second data light wave to the communication main station 300, it first sends a registration light wave, and the registration light wave is a single pulse light wave, which is convenient for distinguishing the second data light wave.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0080] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A point-to-multiple all-optical communication system based on fiber-coded address codes, characterized in that: include: A plurality of optical splitters, wherein the plurality of optical splitters are connected in series through a trunk optical fiber, and the optical splitting end of each optical splitter is connected to a branch optical fiber; A plurality of communication terminals, each of which is connected to the branch optical fibers of the plurality of optical splitters in a one-to-one correspondence; each of the communication terminals has an optical fiber code arranged on the branch optical fiber, the optical fiber code is composed of a plurality of transmission optical fiber gratings with different central wavelengths, and the optical fiber code of each of the communication terminals is different; The communication main station is connected to the plurality of the optical splitters connected in series. The communication main station performs initialization measurement to obtain the fiber coding information of the plurality of communication terminals and compiles a communication routing table for identifying the fiber coding and communicating with the communication terminals.

2. A point-to-multiple all-optical communication system based on fiber coded address code according to claim 1, characterized in that: The communication terminal includes a terminal processing chip, multiple first pulse light sources, a first wavelength division multiplexer, a first circulator, and a first light wave collector. The terminal processing chip is respectively connected to the multiple first pulse light sources and the first light wave collector. The number and center wavelength of the first pulse light sources are consistent with those of the transmission fiber gratings. The output ends of the multiple first pulse light sources are all connected to the first wavelength division multiplexer. The output end of the first wavelength division multiplexer is connected to the input end of the first circulator. The output end of the first circulator is connected to the branch optical fiber. The light wave reflection end of the first circulator is connected to the first light wave collector.

3. A point-to-multiple all-optical communication system based on fiber coded address code according to claim 2, characterized in that: The communication master station includes a master station processing chip, n second pulse light sources, a second wavelength division multiplexer, a second circulator, and a second light wave collector. The master station processing chip is connected to the n second pulse light sources and the second light wave collector respectively. The number n of the second pulse light sources is consistent with the number of central wavelengths of the transmission fiber gratings. The output ends of the n second pulse light sources are all connected to the second wavelength division multiplexer, the output end of the second wavelength division multiplexer is connected to the input end of the second circulator, the output end of the second circulator is connected to the branch optical fiber, and the light wave reflection end of the second circulator is connected to the second light wave collector.

4. A point-to-multiple all-optical communication system based on fiber-coded address codes according to claim 1, characterized in that: The splitting ratio of the main optical fiber to the branch optical fiber of the splitter is 99:

1.

5. A point-to-multiple all-optical communication method based on optical fiber coded address code, characterized in that: Applied to the point-to-multiple all-optical communication system according to any one of claims 1 to 4, the point-to-multiple all-optical communication method comprises the following steps: Different pulse widths are defined for the master station initialization measurement light wave, the first data light wave sent downward by the master station, and the second data light wave sent upward by the terminal; The communication master station performs initialization measurement to obtain the optical fiber coding information of the plurality of communication terminals and compiles a communication routing table; The communication master station broadcasts data to the plurality of communication terminals or sends a first data optical wave to a designated communication terminal according to the communication routing table, and the communication terminal receives and parses the first data optical wave; The communication terminal sends a second data light wave to the communication main station, and the communication main station identifies the communication terminal by parsing the optical fiber coding information contained in the second data light wave, and completes the data upload of the communication terminal.

6. A point-to-multiple all-optical communication method based on optical fiber coded address code according to claim 5, characterized in that: The pulse widths of the master station initialization measurement light wave, the first data light wave, and the second data light wave are k, k / 16, and k / 8 respectively.

7. A point-to-multiple all-optical communication method based on optical fiber coded address code according to claim 5 or 6, characterized in that: The communication master station performs initialization measurement to obtain the optical fiber coding information of the plurality of communication terminals, and compiles a communication routing table, including the following steps: The communication master station sends an initialization measurement light wave, and the initialization measurement light wave passes through the trunk optical fiber, the optical splitter, and the branch optical fiber to the communication terminal; The optical fiber coding of the communication terminal reflects the light wave containing the optical fiber coding information to the communication main station; The communication master station parses out the optical fiber coding information, light intensity, and distance according to the received reflected light waves, and compiles a communication routing table according to the optical fiber coding information, light intensity, and distance.

8. A point-to-multiple all-optical communication method based on optical fiber coded address code according to claim 5 or 6, characterized in that: The communication master station broadcasts data to a plurality of the communication terminals or sends a first data light wave to a designated communication terminal according to the communication routing table, and the communication terminal receives and analyzes the first data light wave, including the following steps Select to broadcast data to a plurality of the communication terminals or send a first data light wave to a designated communication terminal, wherein the first data light wave is composed of a plurality of pulse light waves and the pulse interval time is compiled in binary format, and the plurality of pulse light waves are consistent with the optical fiber coding center wavelength of the selected communication terminal; The optical fiber encoding of the communication terminal reflects and transmits the first data light wave; The reflected first data light wave is transmitted back to the communication main station, and the communication main station analyzes the reflected first data light wave, and verifies the first data light wave according to the analyzed central wavelength, pulse width, and pulse interval time; The first data light wave is transmitted to the communication terminal, and the communication terminal receives the first data light wave, selects the spectrum pulses with the central wavelength and pulse width that conform to its own optical fiber coding, and parses the spectrum pulses into data information according to binary rules.

9. A point-to-multiple all-optical communication method based on optical fiber coded address code according to claim 5 or 6, characterized in that: The communication terminal sends a second data light wave to the communication main station, and the communication main station identifies the communication terminal by parsing the optical fiber coding information contained in the second data light wave, including the following steps: The communication terminal sends a second data light wave to the communication master station, wherein the second data light wave is composed of a plurality of pulse light waves and the pulse interval time is arranged in binary format, and the plurality of pulse light waves are consistent with the optical fiber coding center wavelength of the communication terminal; The optical fiber encoding of the communication terminal reflects and transmits the second data light wave; The reflected second data light wave is transmitted back to the communication terminal, and the communication terminal analyzes the reflected second data light wave and verifies the second data light wave according to the analyzed central wavelength, pulse width, and pulse interval time; The transmitted second data light wave is transmitted to the communication main station, and the communication main station receives the transmitted second data light wave, screens out the spectral pulses with the central wavelength and pulse width that meet the communication routing table, and parses the spectral pulses into data information according to binary rules; for the pulse light waves whose central wavelength is not in the communication routing table, the terminal information is added to the communication routing table.

10. A point-to-multiple all-optical communication method based on optical fiber coded address code according to claim 9, characterized in that: Before the communication terminal sends the second data light wave to the communication master station, it first sends a registration light wave, and the registration light wave is a single pulse light wave.

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