CN111917473A - Information transmission system and method based on optical fiber coding - Google Patents
Information transmission system and method based on optical fiber coding Download PDFInfo
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- CN111917473A CN111917473A CN202010720737.6A CN202010720737A CN111917473A CN 111917473 A CN111917473 A CN 111917473A CN 202010720737 A CN202010720737 A CN 202010720737A CN 111917473 A CN111917473 A CN 111917473A
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 116
- 230000005540 biological transmission Effects 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000003287 optical effect Effects 0.000 claims abstract description 60
- 238000004891 communication Methods 0.000 claims abstract description 42
- 230000000694 effects Effects 0.000 abstract description 10
- 230000008054 signal transmission Effects 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000005284 excitation Effects 0.000 abstract description 5
- 239000000835 fiber Substances 0.000 description 7
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
- G08C23/06—Non-electrical signal transmission systems, e.g. optical systems through light guides, e.g. optical fibres
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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
- H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
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Abstract
The invention discloses an information transmission system and method based on optical fiber coding, wherein the system comprises: the optical fiber communication device comprises a light source, a circulator, a first SOA optical switch, a communication optical fiber provided with an optical fiber code, a signal generator and a photoelectric detector, wherein the signal generator is used for receiving a regularly-strained light wave signal returned by the optical fiber code; and the main control module is used for controlling the output of the light source, controlling the receiving of the photoelectric detector and identifying the light wave signal which is strained according to the rule. According to the scheme, the optical fiber sensing and optical fiber coding technologies are combined with the optical fiber communication, the information input end does not need to be connected into an optical cable and only carries out strain excitation on the outer layer of the optical cable, the effect that the existing transmission equipment loses effect after being invaded and then communication cannot be finished can be avoided, the information transmission system of the optical fiber coding uses the optical cable to return, illegal stealing can be avoided, and the unique identification and sensing characteristics of the optical fiber coding are utilized, so that the unique identification and stable signal transmission of the strain gauge are realized.
Description
Technical Field
The invention relates to the field of optical fiber communication, in particular to an information transmission system and method based on optical fiber coding.
Background
The existing optical fiber communication system mainly depends on the sending and receiving of bidirectional light waves, depends on a large number of chips for signal transmission, and cannot carry out effective signal transmission under special conditions (such as the situations that wireless signals cannot be used, optical fiber transmission equipment is invaded, long-distance physical media are needed for transmitting information, and the like).
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 information transmission system based on optical fiber coding, which can adapt to information transmission under special conditions; the invention also provides an information transmission method based on the optical fiber coding.
An information transmission system based on optical fiber coding according to an embodiment of a first aspect of the present invention includes: a light source for outputting a light wave signal; a circulator having a first port, a second port, and a third port; a first SOA optical switch is arranged between the first port of the circulator and the output end of the light source; one end of the communication optical fiber is connected with the second port of the circulator, and the other end of the communication optical fiber is provided with an optical fiber code; the signal generator is arranged on one side of the optical fiber code on the communication optical fiber and used for generating a physical signal and acting on the outer layer of the communication optical fiber so as to enable the optical wave signal returned by the optical fiber code to generate strain according to a certain rule; a second SOA optical switch is arranged between the input end of the photoelectric detector and the third port of the circulator and is used for receiving the regularly strained light wave signal returned by the optical fiber code; and the main control module is respectively and electrically connected with the light source and the photoelectric detector and is used for controlling the output of the light source, controlling the receiving of the photoelectric detector and identifying the optical wave signals which are strained according to rules.
The information transmission system based on optical fiber coding according to the first embodiment of the invention has at least the following advantages: according to the scheme, optical fiber sensing, an optical fiber coding technology and optical fiber communication are combined, an information input end is not connected with an optical cable and only carries out strain excitation on the outer layer of the optical cable, the effect that the existing transmission equipment loses effect after being invaded and then communication cannot be finished can be avoided, especially for the condition that certain information collection cannot use wireless or satellite return transmission, the information transmission system of the optical fiber coding uses the optical cable to return and can avoid illegal stealing, and unique identification characteristics and sensing characteristics of the optical fiber coding are utilized, so that unique identification and stable signal transmission of a strain gauge are achieved.
According to some embodiments of the first aspect of the present invention, the signal generator comprises a fixing plate, and a power source, a control chip and a strain gauge which are arranged on the fixing plate, wherein the power source supplies power to the control chip and the strain gauge, the control chip is used for controlling the strain gauge to output a physical signal according to a certain rule, and one side of the optical fiber code on the communication optical fiber is fixed on the fixing plate and is in contact with the strain gauge.
According to some embodiments of the first aspect of the present invention, the strain gauge is an electromagnetic vibrator, a heater, or a stress generator.
According to some embodiments of the first aspect of the present invention, the strain gauge is an electromagnetic vibrator, the switching time difference of the electromagnetic vibrator is one basic signal element, the duration of the basic signal element is T0, and the waiting time of two adjacent basic signal elements is n × T0, where n is a positive integer.
According to some embodiments of the first aspect of the present invention, the switching pulse time of the first SOA optical switch and the second SOA optical switch is T, the switching time difference between the first SOA optical switch and the second SOA optical switch is n × T, the length L of the optical fiber code from the photodetector is n × T c × r/2, where n is a positive integer, c is the speed of light, and r is the refractive index of the optical fiber group.
According to the second aspect of the invention, the information transmission method based on the optical fiber coding comprises the following steps: controlling a light source to send a light wave signal; the light wave signal generates pulse light waves through the first SOA optical switch, and the pulse light waves enter the communication optical fiber through the circulator; generating a physical signal and acting on the outer layer of the communication optical fiber at the position of the optical fiber code so as to enable the optical wave signal returned by the optical fiber code to generate strain according to a certain rule; the photoelectric detector is controlled to receive the light wave signal returned by the circulator in the communication optical fiber through the switching time of the second SOA optical switch to generate pulse light waves which are strained according to rules; the photoelectric detector transmits the pulse light waves received by the photoelectric detector according to the rule strain to the main control module, and the main control module identifies the pulse light waves according to the rule strain.
The information transmission method based on the optical fiber coding according to the second embodiment of the invention has at least the following advantages: according to the scheme, optical fiber sensing, an optical fiber coding technology and optical fiber communication are combined, an information input end is not connected with an optical cable and only carries out strain excitation on the outer layer of the optical cable, the effect that the existing transmission equipment loses effect after being invaded and then communication cannot be finished can be avoided, especially for the condition that certain information collection cannot use wireless or satellite return transmission, the information transmission system of the optical fiber coding uses the optical cable to return and can avoid illegal stealing, and unique identification characteristics and sensing characteristics of the optical fiber coding are utilized, so that unique identification and stable signal transmission of a strain gauge are achieved.
According to some embodiments of the second aspect of the present invention, the physical signal is a vibration signal, a temperature signal or a stress signal.
According to some embodiments of the second aspect of the present invention, the switching pulse time of the first and second SOA optical switches is T, the switching time difference between the first and second SOA optical switches is n × T, the length L of the fiber code from the photodetector is n × T c × r/2, where n is a positive integer, c is the speed of light, and r is the fiber group refractive index.
According to some embodiments of the second aspect of the present invention, the physical signal is a vibration signal, the switching time difference of the vibration signal is a basic signal element, the duration of the basic signal element is T0, and the waiting time of two adjacent basic signal elements is n × T0, where n is a positive integer.
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 information transmission system according to an embodiment of the first aspect of the present invention;
FIG. 2 is a schematic diagram of a signal generator according to an embodiment of the first aspect of the present invention;
fig. 3 is a flowchart of an information transmission method according to a second aspect of the present invention.
Reference numerals:
the optical fiber communication device comprises a light source 100, a circulator 200, a first SOA optical switch 210, a second SOA optical switch 220, a communication optical fiber 300, an optical fiber code 310, a signal generator 400, a fixing plate 410, a power supply 420, a control chip 430, a strain gauge 440, a photoelectric detector 500 and a main control module 600.
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 information transmission system based on optical fiber coding according to an embodiment of a first aspect of the present disclosure includes: a light source 100 for outputting a lightwave signal; a circulator 200, the circulator 200 having a first port, a second port, and a third port; a first SOA optical switch 210 is arranged between the first port of the circulator 200 and the output end of the light source 100; a communication optical fiber 300, wherein one end of the communication optical fiber 300 is connected with the second port of the circulator 200, and the other end of the communication optical fiber 300 is provided with an optical fiber code 310; a signal generator 400, disposed on one side of the optical fiber code 310 on the communication optical fiber 300, for generating a physical signal and acting on the outer layer of the communication optical fiber 300 to make the optical wave signal returned by the optical fiber code 310 generate strain according to a certain rule; a second SOA optical switch 220 is arranged between an input end of the photodetector 500 and the third port of the circulator 200, and is configured to receive the regularly strained light wave signal returned by the optical fiber code 310; the main control module 600 is electrically connected to the light source 100 and the photodetector 500 respectively for controlling the output of the light source 100, controlling the receiving of the photodetector 500, and identifying the regularly-strained light wave signals.
The circulator 200 is used to implement coupling of light waves, output input light waves to the optical fiber, and output reflected and scattered light waves in the optical fiber to the photodetector, and the signal generator 400 is used to generate a regular strain frequency sequence, when strain occurs, the wavelength of the light wave signals reflected and scattered by the optical fiber code will change along with the strain frequency.
The optical fiber coding and optical fiber sensing technology is combined with optical fiber communication, the information input end does not need to be accessed into an optical cable and only carries out strain excitation on the outer layer of the optical cable, the effect that the existing transmission equipment loses effect after being invaded and then communication cannot be finished can be avoided, especially for the condition that certain information collection cannot use wireless or satellite return, the information transmission system of the optical fiber coding uses the optical cable to return and can avoid illegal stealing, and the unique identification characteristic and the sensing characteristic of the optical fiber coding are utilized, so that the unique identification and stable signal transmission of the strain gauge are realized.
In some embodiments of the first aspect of the present invention, as shown in fig. 2, the signal generator 400 includes a fixing plate 410, and a power source 420, a control chip 430 and a strain gauge 440 disposed on the fixing plate 410, wherein the power source 420 supplies power to the control chip 430 and the strain gauge 440, the control chip 440 is configured to control the strain gauge 440 to output a physical signal according to a certain rule, and the fiber code 310 side of the communication fiber 300 is fixed (e.g. by glue or other fasteners) on the fixing plate 410 and is in contact with the strain gauge 440. The control chip 430 controls the strain gauge 400 to strain according to a certain rule, strains according to a certain time rule, converts the rule into a corresponding long short message number or 0, 1 signal, and finally preferably selects the 0, 1 signal to convert the binary code into a strain signal in combination with the operability and convenience of the system.
In some embodiments of the first aspect of the present invention, the strain gauge 440 is an electromagnetic vibrator, a heater, or a stress generator. However, considering factors such as time control and energy consumption control (for example, the heater is not beneficial to heat dissipation control), and finally considering the use of an electromagnetic control vibrator; the single vibration has certain characteristics of the vibration waveform, but because the single vibration is influenced by factors such as interference, distance and the like, the accuracy rate is risky when an accurate characteristic point needs to be identified, but the scheme only identifies the vibration and continuous vibration time, and the method is easy to realize.
In some embodiments of the first aspect of the present invention, the switching pulse time of the first SOA optical switch 210 and the second SOA optical switch 220 is T, the switching time difference between the first SOA optical switch 210 and the second SOA optical switch 220 is n × T, and the length L of the fiber code 310 from the photodetector 500 is n × T × c × r/2, where n is a positive integer, c is the speed of light, and r is the refractive index of the fiber group.
In some embodiments of the first aspect of the present invention, the strain gauge 440 is an electromagnetic vibrator, the switching time difference of the electromagnetic vibrator is one basic signal element, the duration of the basic signal element is T0, and the waiting time of two adjacent basic signal elements is n × T0, where n is a positive integer.
After each basic signal element is sent, the main control module can sense a strain point and strain starting and stopping time; when the signal generator sends the strain signal according to a certain time rule, the main control module can also sense the time rule, a basic signal element is 1, and n T0 intervals are 0, so that a binary sequence code can be formed, and the regular transmission of the signal is realized.
As shown in fig. 3, an information transmission method based on optical fiber coding according to an embodiment of the second aspect of the present invention includes the following steps: controlling a light source to send a light wave signal; the light wave signal generates pulse light waves through the first SOA optical switch, and the pulse light waves enter the communication optical fiber through the circulator; generating a physical signal and acting on the outer layer of the communication optical fiber at the position of the optical fiber code so as to enable the optical wave signal returned by the optical fiber code to generate strain according to a certain rule; the photoelectric detector is controlled to receive the light wave signal returned by the circulator in the communication optical fiber through the switching time of the second SOA optical switch to generate pulse light waves which are strained according to rules; the photoelectric detector transmits the pulse light waves received by the photoelectric detector according to the rule strain to the main control module, and the main control module identifies the pulse light waves according to the rule strain.
The optical fiber coding and optical fiber sensing technology is combined with optical fiber communication, the information input end does not need to be accessed into an optical cable and only carries out strain excitation on the outer layer of the optical cable, the effect that the existing transmission equipment loses effect after being invaded and then communication cannot be finished can be avoided, especially for the condition that certain information collection cannot use wireless or satellite return, the information transmission system of the optical fiber coding uses the optical cable to return and can avoid illegal stealing, and the unique identification characteristic and the sensing characteristic of the optical fiber coding are utilized, so that the unique identification and stable signal transmission of the strain gauge are realized.
In some embodiments of the second aspect of the present invention, the physical signal is a vibration signal, a temperature signal or a stress signal. When the optical fiber is affected by external environment (such as temperature, pressure, vibration, etc.), parameters such as intensity, phase, frequency, polarization state, etc. of the transmitted light in the optical fiber will change correspondingly.
In some embodiments of the second aspect of the present invention, the switching pulse time of the first SOA optical switch and the second SOA optical switch is T, the switching time difference between the first SOA optical switch and the second SOA optical switch is n × T, and the length L of the optical fiber code from the photodetector is n × T × c × r/2, where n is a positive integer, c is the speed of light, and r is the refractive index of the optical fiber group. The measurement accuracy l is the length of the fiber transmitted by the SOA switching pulse time T, and l is T c r/2.
In some embodiments of the second aspect of the present invention, the physical signal is a vibration signal, the switching time difference (i.e. the time interval between the encoded wavelength changes of the optical fiber) of the vibration signal is a basic signal element, the duration of the basic signal element is T0, the photodetector will detect that the time of the continuous change of the encoded wavelength of the optical fiber is close to T0, so that the system recognizes a "1" symbol, and the waiting time of two adjacent basic signal elements is n T0, where n is a positive integer. N "0" symbols are identified, and combined to form the basic information binary sequence code.
After each basic signal element is sent, the main control module can sense a strain point and strain starting and stopping time; when the signal generator sends the strain signal according to a certain time rule, the main control module can also sense the time rule, a basic signal element is 1, and n T0 intervals are 0, so that a binary sequence code can be formed, and the regular transmission of the signal is realized.
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 (9)
1. An information transmission system based on optical fiber coding, comprising:
a light source (100) for outputting a lightwave signal;
a circulator (200), the circulator (200) having a first port, a second port, a third port; a first SOA optical switch (210) is arranged between the first port of the circulator (200) and the output end of the light source (100);
a communication optical fiber (300), wherein one end of the communication optical fiber (300) is connected with the second port of the circulator (200), and the other end of the communication optical fiber (300) is provided with an optical fiber code (310);
the signal generator (400) is arranged on one side of the optical fiber code (310) on the communication optical fiber (300) and is used for generating a physical signal and acting on the outer layer of the communication optical fiber (300) so as to enable the optical wave signal returned by the optical fiber code (310) to generate strain according to a certain rule;
a second SOA optical switch (220) is arranged between the input end of the photoelectric detector (500) and the third port of the circulator (200) and is used for receiving the regularly strained light wave signal returned by the optical fiber code (310);
the main control module (600) is respectively and electrically connected with the light source (100) and the photoelectric detector (500) and is used for controlling the output of the light source (100), controlling the receiving of the photoelectric detector (500) and identifying the optical wave signals strained according to the rule.
2. The optical fiber coding-based information transmission system according to claim 1, wherein: the signal generator (400) comprises a fixing plate (410), a power source (420), a control chip (430) and a strain gauge (440), wherein the power source (420) is arranged on the fixing plate (410), the control chip (430) and the strain gauge (440) are powered by the power source (420), the control chip (440) is used for controlling the strain gauge (440) to output a physical signal according to a certain rule, and one side of an optical fiber code (310) on the communication optical fiber (300) is fixed on the fixing plate (410) and is in contact with the strain gauge (440).
3. The optical fiber coding-based information transmission system according to claim 2, wherein: the strain gauge (440) is an electromagnetic vibrator, a heater, or a stress generator.
4. The optical fiber coding-based information transmission system according to claim 2, wherein: the strain gauge (440) is an electromagnetic vibrator, the switching time difference of the electromagnetic vibrator is a basic signal element, the duration of the basic signal element is T0, and the waiting time of two adjacent basic signal elements is n T0, wherein n is a positive integer.
5. The optical fiber coding-based information transmission system according to claim 1, wherein: the switching pulse time of the first SOA optical switch (210) and the second SOA optical switch (220) is T, the switching time difference between the first SOA optical switch (210) and the second SOA optical switch (220) is n T, the length L of the optical fiber code (310) from the photoelectric detector (500) is n T c r/2, wherein n is a positive integer, c is the speed of light, and r is the refractive index of the optical fiber group.
6. An information transmission method based on optical fiber coding is characterized in that: the method comprises the following steps of controlling a light source to send a light wave signal;
the light wave signal generates pulse light waves through the first SOA optical switch, and the pulse light waves enter the communication optical fiber through the circulator;
generating a physical signal and acting on the outer layer of the communication optical fiber at the position of the optical fiber code so as to enable the optical wave signal returned by the optical fiber code to generate strain according to a certain rule;
the photoelectric detector is controlled to receive the light wave signal returned by the circulator in the communication optical fiber through the switching time of the second SOA optical switch to generate pulse light waves which are strained according to rules;
the photoelectric detector transmits the pulse light waves received by the photoelectric detector according to the rule strain to the main control module, and the main control module identifies the pulse light waves according to the rule strain.
7. The method according to claim 6, wherein the information transmission method based on optical fiber coding comprises: the physical signal is a vibration signal, a temperature signal or a stress signal.
8. The method according to claim 6, wherein the information transmission method based on optical fiber coding comprises: the switching pulse time of the first SOA optical switch and the second SOA optical switch is T, the switching time difference between the first SOA optical switch and the second SOA optical switch is n T, the length L of the optical fiber code from the photoelectric detector is n T c r/2, wherein n is a positive integer, c is the light speed, and r is the refractive index of the optical fiber group.
9. The method according to claim 6, wherein the information transmission method based on optical fiber coding comprises: the physical signal is a vibration signal, the switching time difference of the vibration signal is a basic signal element, the duration of the basic signal element is T0, and the waiting time of two adjacent basic signal elements is n T0, wherein n is a positive integer.
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| CN202010720737.6A CN111917473A (en) | 2020-07-24 | 2020-07-24 | Information transmission system and method based on optical fiber coding |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113852422A (en) * | 2021-11-16 | 2021-12-28 | 中国电信股份有限公司 | System and method for identifying connection relationship between equipment port and optical cable core |
| WO2024001334A1 (en) * | 2022-06-29 | 2024-01-04 | 中山水木光华电子信息科技有限公司 | Addressable ad hoc fiber-optic network system based on fiber-optic codes, and addressing method |
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2020
- 2020-07-24 CN CN202010720737.6A patent/CN111917473A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113852422A (en) * | 2021-11-16 | 2021-12-28 | 中国电信股份有限公司 | System and method for identifying connection relationship between equipment port and optical cable core |
| CN113852422B (en) * | 2021-11-16 | 2023-04-07 | 中国电信股份有限公司 | System and method for identifying connection relationship between equipment port and optical cable core |
| WO2024001334A1 (en) * | 2022-06-29 | 2024-01-04 | 中山水木光华电子信息科技有限公司 | Addressable ad hoc fiber-optic network system based on fiber-optic codes, and addressing method |
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