CN115276811A - Optical fiber code demodulator module system and method - Google Patents
Optical fiber code demodulator module system and method Download PDFInfo
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- CN115276811A CN115276811A CN202210598303.2A CN202210598303A CN115276811A CN 115276811 A CN115276811 A CN 115276811A CN 202210598303 A CN202210598303 A CN 202210598303A CN 115276811 A CN115276811 A CN 115276811A
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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
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
- H04B10/504—Laser transmitters using direct modulation
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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
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0791—Fault location on the transmission path
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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
- H04B10/516—Details of coding or modulation
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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
- H04B10/516—Details of coding or modulation
- H04B10/548—Phase or frequency modulation
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Abstract
The embodiment of the application provides an optical fiber code demodulator module system and an optical fiber code demodulator module method, and relates to the technical field of signal debugging. The fiber code demodulator module system comprises: the demodulation detection module comprises a modem module and a control unit, and the control unit is electrically connected to the modem module; a test module for transmitting a detection signal to the modem module, the test module comprising: a detection circuit for providing a detection signal; the power supply control circuit is used for converting the direct current power supply into a detection voltage signal according to the detection signal; the device also comprises an alternating current booster circuit which is used for outputting the detection signal according to the detection voltage signal. The test device has the advantages that the test device meets the requirement of one-to-many simple tests, improves the working efficiency, reduces the test waiting time and the manual operation time, can be independently developed and integrated in the part of software, greatly reduces the whole test cost, and has simple structure and strong applicability.
Description
Technical Field
The present application relates to the field of signal debugging technologies, and in particular, to an optical fiber encoding demodulator module system and method.
Background
In the related art, optical fiber communication is rapidly developed into a main form of information transmission at present due to advantages of a wide frequency band, a large capacity, and the like, and optical modulation and demodulation are necessary to implement optical communication, so that an optical modem is receiving more and more attention as a key device of an optical fiber communication system. The optical modulator has a direct modulator and an external modulator, and the optical demodulator is classified into a direct modulator and an external modulator. The direct modulator and the demodulator with the built-in preamplifier are the key points of research of the project, the direct modulation has the advantages of simplicity, economy and easiness in realization, and the demodulator with the built-in preamplifier has the characteristics of high integration level and small volume;
however, the existing optical modulator cannot meet the requirement of one-to-many simple test, the working efficiency is low, and the test waiting time is long.
Disclosure of Invention
The present application is directed to solving at least one of the problems in the prior art. Therefore, the application provides an optical fiber code demodulator module system and a method, and the optical fiber code demodulator module system has the advantages of simple structure, low cost, safety, reliability, low use requirement and strong applicability.
In one aspect, an optical fiber codec module system provided in an embodiment of the present invention includes:
the demodulation detection module comprises a modem module and a control unit, wherein the control unit is electrically connected to the modem module and is used for executing a program to initialize and monitor the modem module;
a test module for transmitting a detection signal to the modem module, the test module comprising: a detection circuit for providing a detection signal; the power supply control circuit is used for converting the direct current power supply into a detection voltage signal according to the detection signal; the device also comprises an alternating current booster circuit which is used for outputting the detection signal according to the detection voltage signal.
In some embodiments of the present application, the optical fiber link network further comprises an identification unit for identifying at least one optical fiber code in the optical fiber link network and a position relationship of the at least one optical fiber code by using the modem module;
the first acquisition unit is used for acquiring optical fiber media respectively corresponding to the at least one optical fiber code, wherein the optical fiber codes and the optical fiber media have unique corresponding relations, and the optical fiber codes comprise optical fiber physical address codes and/or wavelength codes;
and the second obtaining unit is used for obtaining the connection relation of the optical fiber media corresponding to the at least one optical fiber code according to the position relation of the at least one optical fiber code so as to identify the topological structure of the optical fiber link network.
In some embodiments of the present application, the apparatus further comprises: a third obtaining unit, configured to obtain energy information of the optical fiber medium after identifying a topology structure of the optical fiber link network, where the energy information at least includes reflected energy; the first monitoring unit is used for monitoring the running state of the optical fiber medium according to the energy information of the optical fiber medium; the second monitoring unit is used for monitoring the running state of the optical fiber link network according to the running state of the optical fiber medium;
the second monitoring unit includes: the evaluation module is used for evaluating the operation quality of the optical fiber link network; and the positioning module is used for positioning the fault of the optical fiber link network.
In some embodiments of the present application, the apparatus further comprises: and the construction unit is used for constructing an optical fiber link network component management resource library, constructing an optical fiber link network state automatic operation library, constructing an optical fiber link intelligent management platform based on the database, realizing real-time interaction of the resource library and the operation library, and realizing automatic identification, centralized management, accurate diagnosis and accurate positioning of the optical fiber link intelligent management platform after identifying the topological structure of the optical fiber link network.
In some embodiments of the present application, the optical fiber module further includes a mode-locked laser, an optical dispersion device, an optical splitter, an optical fiber delay line, a spatial light modulator, an optical multiplexer, and a high-speed photodetector, where the mode-locked laser, the optical dispersion device, and the optical splitter are connected in sequence, the optical splitter is connected to the input end of the optical fiber delay line and the input end of the spatial light modulator, the output end of the optical fiber delay line and the output end of the spatial light modulator are connected to the optical multiplexer, and the optical multiplexer is connected to the high-speed photodetector.
In some embodiments of the present application, the optical splitter employs a 2 × 2 optical coupler; and/or the optical combiner adopts a 2 x 2 optical coupler, the optical fiber delay line is an electrically controlled adjustable delay line, and the central frequency of the broadband phase coding signal output by the high-speed photoelectric detector is determined by the ratio of the delay amount of the optical fiber delay line to the dispersion amount of the optical dispersion device.
According to the optical fiber code demodulator module system provided by the embodiment of the application, the one-to-many simple test requirements can be met, the working efficiency is improved, the test waiting time and the manual operation time are shortened, the part of software can be independently developed and old test software can be integrated, the whole test cost is greatly reduced, the structure is simple, and the applicability is strong.
On the other hand, an embodiment of the present invention further provides an optical fiber codec module method, including any one of the above optical fiber codec module systems; and the following steps:
s1, generating ultrashort light pulses, and transmitting the ultrashort light pulses by using a mode-locked laser;
s2, optically processing the ultrashort optical pulse and dividing the ultrashort optical pulse into two paths;
s3, respectively processing the pulses output after the shunt circuit: one path is delayed by an optical fiber delay line, and the other path is subjected to phase modulation by a spatial light modulator;
and S4, combining the two paths of respectively processed pulses into one path by using an optical combiner, and outputting the broadband tunable phase coding signal by the mutual interference of the two paths.
In some embodiments of the present application, the step S2 specifically includes: after the ultrashort optical pulse is dispersed by an optical dispersion device, the ultrashort optical pulse is divided into two paths by an optical splitter.
In some embodiments of the present application, the center frequency of the broadband tunable phase-encoded signal is determined by a ratio of a delay amount of the fiber delay line and a dispersion amount of the optical dispersion device; the time-bandwidth product of the broadband tunable phase-coded signal is determined by the inverse of the product of the optical pulse time width generated by the mode-locked laser and the minimum coding unit of the phase-coding function of the spatial light modulator.
Additional aspects and advantages of the present application 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 present application.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic flow diagram of a fiber codec module system according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.
Examples
Fiber codec module systems and methods according to embodiments of the present application are described below with reference to the accompanying drawings;
as shown in fig. 1, a fiber code demodulator module system according to an embodiment of the present application includes:
the demodulation detection module comprises a modem module and a control unit, wherein the control unit is electrically connected to the modem module and is used for executing a program to initialize and monitor the modem module;
a test module for transmitting a detection signal to the modem module, the test module comprising: a detection circuit for providing a detection signal; the power supply control circuit is used for converting the direct current power supply into a detection voltage signal according to the detection signal; the device also comprises an alternating current booster circuit which is used for outputting the detection signal according to the detection voltage signal.
In this embodiment, the apparatus further includes an identifying unit, configured to identify, by using a modem module, at least one fiber code in a fiber link network and a location relationship of the at least one fiber code;
the first acquisition unit is used for acquiring optical fiber media respectively corresponding to the at least one optical fiber code, wherein the optical fiber codes and the optical fiber media have unique corresponding relations, and the optical fiber codes comprise optical fiber physical address codes and/or wavelength codes;
and the second obtaining unit is used for obtaining the connection relation of the optical fiber media corresponding to the at least one optical fiber code according to the position relation of the at least one optical fiber code so as to identify the topological structure of the optical fiber link network.
In some other embodiments, the apparatus further comprises: a third obtaining unit, configured to obtain energy information of the optical fiber medium after identifying a topology structure of the optical fiber link network, where the energy information at least includes reflected energy; the first monitoring unit is used for monitoring the running state of the optical fiber medium according to the energy information of the optical fiber medium; the second monitoring unit is used for monitoring the running state of the optical fiber link network according to the running state of the optical fiber medium;
the second monitoring unit includes: the evaluation module is used for evaluating the operation quality of the optical fiber link network; and the positioning module is used for positioning the fault of the optical fiber link network.
In this embodiment, the apparatus further includes: the construction unit is used for constructing an optical fiber link network component management resource library, an optical fiber link network state automatic operation library, an optical fiber link intelligent management platform based on a database, realizing real-time interaction of the resource library and the operation library and realizing automatic identification, centralized management, accurate diagnosis and accurate positioning of the optical fiber link intelligent management platform after identifying the topological structure of the optical fiber link network;
the optical fiber physical address code has the unique identification characteristic of an optical fiber medium, can be used in an optical fiber link component assembly, and realizes the unique remote identification of each component of the optical fiber link, so that the remote identification of the optical fiber link is realized;
applying an optical fiber physical address coding technology to an optical device in an optical fiber link to form an intelligent optical fiber medium; after an optical fiber link composed of intelligent optical fiber media is built, information of all the intelligent optical fiber media used, including optical address codes, distances and reflected energy, can be monitored in real time in a communication service room;
by diagnosing the operation quality of the optical fiber link in real time and taking the intelligent optical fiber medium as a real-time diagnosis node, the section and the position of the fault are directly judged, and the fault is directly positioned to the specific node.
The optical fiber module comprises a mode-locked laser, an optical dispersion device, an optical splitter, an optical fiber delay line, a spatial light modulator, an optical multiplexer and a high-speed photoelectric detector, wherein the mode-locked laser, the optical dispersion device and the optical splitter are sequentially connected, the optical splitter is respectively connected with the input end of the optical fiber delay line and the input end of the spatial light modulator, the output end of the optical fiber delay line and the output end of the spatial light modulator are respectively connected with the optical multiplexer, and the optical multiplexer is connected with the high-speed photoelectric detector.
In the embodiment, the optical splitter adopts a 2 × 2 optical coupler; and/or the optical combiner adopts a 2 x 2 optical coupler, the optical fiber delay line is an electric control adjustable delay line, and the central frequency of the broadband phase coding signal output by the high-speed photoelectric detector is determined by the ratio of the delay amount of the optical fiber delay line to the dispersion amount of the optical dispersion device.
The working principle is as follows: according to the optical fiber code demodulator module system provided by the embodiment of the application, the one-to-many simple test requirements can be met, the working efficiency is improved, the test waiting time and the manual operation time are shortened, the part of software can be independently developed and old test software can be integrated, the whole test cost is greatly reduced, the structure is simple, and the applicability is strong.
On the other hand, an embodiment of the present invention further provides an optical fiber codec module method, including any one of the above optical fiber codec module systems; and the following steps:
s1, generating ultrashort light pulses, and transmitting the ultrashort light pulses by using a mode-locked laser;
s2, optically processing the ultrashort optical pulse and dividing the ultrashort optical pulse into two paths;
s3, respectively processing the output pulses after the shunt: one path is delayed by an optical fiber delay line, and the other path is subjected to phase modulation by a spatial light modulator;
and S4, combining the two paths of respectively processed pulses into one path by using an optical combiner, and outputting the broadband tunable phase coding signal by the mutual interference of the two paths.
In some embodiments of the present application, the step S2 specifically includes: after the ultrashort light pulse is dispersed by an optical dispersion device, the ultrashort light pulse is divided into two paths by an optical splitter.
In some embodiments of the present application, the center frequency of the broadband tunable phase-encoded signal is determined by a ratio of a delay amount of the fiber delay line and a dispersion amount of the optical dispersion device; the time-bandwidth product of the broadband tunable phase-coded signal is determined by the inverse of the product of the optical pulse time width generated by the mode-locked laser and the minimum coding unit of the phase-coding function of the spatial light modulator.
Other configurations and operations of the demodulation detection module and the test module according to embodiments of the present application are known to those of ordinary skill in the art and will not be described in detail herein.
The power supply and the principle of the demodulation detection module and the test module will be clear to a person skilled in the art and will not be described in detail here.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
It will be understood that when an element is referred to as being "fixed," "disposed," "secured" or "disposed" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, when one element is considered to be "fixedly connected" to another element, the two elements may be fixed by way of detachable connection, or may be fixed by way of non-detachable connection, such as socket connection, snap connection, integrally formed fixation, welding, etc., which can be realized in the prior art, and thus are not cumbersome. When an element is perpendicular or nearly perpendicular to another element, it is desirable that the two elements are perpendicular, but some vertical error may exist due to manufacturing and assembly effects. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (9)
1. An optical fiber code demodulator module system, comprising
The demodulation detection module comprises a modem module and a control unit, wherein the control unit is electrically connected to the modem module and is used for executing a program to initialize and monitor the modem module;
a test module for transmitting a detection signal to the modem module, the test module comprising: a detection circuit for providing a detection signal; the power supply control circuit is used for converting the direct current power supply into a detection voltage signal according to the detection signal; the device also comprises an alternating current booster circuit which is used for outputting the detection signal according to the detection voltage signal.
2. The fiber code demodulator module system according to claim 1, further comprising an identification unit for identifying at least one fiber code and a positional relationship of the at least one fiber code in the fiber link network by using the modem module;
the first acquisition unit is used for acquiring optical fiber media respectively corresponding to the at least one optical fiber code, wherein the optical fiber codes and the optical fiber media have unique corresponding relations, and the optical fiber codes comprise optical fiber physical address codes and/or wavelength codes;
and the second obtaining unit is used for obtaining the connection relation of the optical fiber media corresponding to the at least one optical fiber code according to the position relation of the at least one optical fiber code so as to identify the topological structure of the optical fiber link network.
3. A fiber codec module system according to claim 2, wherein the apparatus further comprises: a third obtaining unit, configured to obtain energy information of the optical fiber medium after identifying a topology structure of the optical fiber link network, where the energy information at least includes reflected energy; the first monitoring unit is used for monitoring the running state of the optical fiber medium according to the energy information of the optical fiber medium; the second monitoring unit is used for monitoring the running state of the optical fiber link network according to the running state of the optical fiber medium;
the second monitoring unit includes: the evaluation module is used for evaluating the operation quality of the optical fiber link network; and the positioning module is used for positioning the fault of the optical fiber link network.
4. A fiber codec module system according to claim 3, wherein the apparatus further comprises: and the construction unit is used for constructing an optical fiber link network component management resource library, constructing an optical fiber link network state automatic operation library, constructing an optical fiber link intelligent management platform based on the database, realizing real-time interaction of the resource library and the operation library, and realizing automatic identification, centralized management, accurate diagnosis and accurate positioning of the optical fiber link intelligent management platform after identifying the topological structure of the optical fiber link network.
5. The fiber coding demodulator module system according to claim 1, further comprising a mode-locked laser, an optical dispersion device, an optical splitter, a fiber delay line, a spatial light modulator, an optical combiner, and a high-speed photodetector, wherein the mode-locked laser, the optical dispersion device, and the optical splitter are connected in sequence, the optical splitter is connected to the input end of the fiber delay line and the input end of the spatial light modulator, respectively, the output end of the fiber delay line and the output end of the spatial light modulator are connected to the optical combiner, respectively, and the optical combiner is connected to the high-speed photodetector.
6. The fiber code demodulator module system according to claim 5, wherein the optical splitter adopts a 2 x 2 optical coupler; and/or the optical combiner adopts a 2 x 2 optical coupler, the optical fiber delay line is an electric control adjustable delay line, and the central frequency of the broadband phase coding signal output by the high-speed photoelectric detector is determined by the ratio of the delay amount of the optical fiber delay line to the dispersion amount of the optical dispersion device.
7. A fiber codec module method comprising the fiber codec module system of any one of claims 1-6; and the following steps:
s1, generating ultrashort light pulses, and transmitting the ultrashort light pulses by using a mode-locked laser;
s2, optically processing the ultrashort light pulse and dividing the ultrashort light pulse into two paths;
s3, respectively processing the pulses output after the shunt circuit: one path is delayed by an optical fiber delay line, and the other path is subjected to phase modulation by a spatial light modulator;
and S4, combining the two paths of respectively processed pulses into one path by using an optical combiner, and outputting the broadband tunable phase coding signal by the mutual interference of the two paths.
8. The method according to claim 7, wherein the step S2 is specifically: after the ultrashort optical pulse is dispersed by an optical dispersion device, the ultrashort optical pulse is divided into two paths by an optical splitter.
9. The fiber code demodulator module method according to claim 8, wherein the center frequency of the broadband tunable phase-coded signal is determined by a ratio of a delay amount of the fiber delay line and a dispersion amount of the optical dispersion device; the time bandwidth product of the broadband tunable phase coding signal is determined by the time width of the optical pulse generated by the mode-locked laser and the reciprocal of the product of the minimum coding unit of the phase coding function of the spatial light modulator.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5519526A (en) * | 1992-10-21 | 1996-05-21 | California Institute Of Technology | Optical protocols for communication networks |
| CN102469214A (en) * | 2010-10-29 | 2012-05-23 | 英业达股份有限公司 | Testing system of modem module and testing method thereof |
| CN109361470A (en) * | 2018-12-26 | 2019-02-19 | 杭州电子科技大学 | Phase-coded signal generation system and method based on spatial light modulator and light pulse interference |
| CN111654323A (en) * | 2019-03-04 | 2020-09-11 | 国网山西省电力公司信息通信分公司 | Intelligent optical link operation and maintenance management method and device |
-
2022
- 2022-05-30 CN CN202210598303.2A patent/CN115276811A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5519526A (en) * | 1992-10-21 | 1996-05-21 | California Institute Of Technology | Optical protocols for communication networks |
| CN102469214A (en) * | 2010-10-29 | 2012-05-23 | 英业达股份有限公司 | Testing system of modem module and testing method thereof |
| CN109361470A (en) * | 2018-12-26 | 2019-02-19 | 杭州电子科技大学 | Phase-coded signal generation system and method based on spatial light modulator and light pulse interference |
| CN111654323A (en) * | 2019-03-04 | 2020-09-11 | 国网山西省电力公司信息通信分公司 | Intelligent optical link operation and maintenance management method and device |
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