CN212620789U - Optical fiber code identification system based on modulation mode - Google Patents
Optical fiber code identification system based on modulation mode Download PDFInfo
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Abstract
The utility model discloses an optical fiber coding identification system based on modulation mode, include: a high power light source group; a wavelength division multiplexer; a modem; a circulator; the input end of the optical fiber is connected with the second port of the circulator, and the optical fiber is provided with an optical fiber code; the third port of the circulator is connected with a light wave signal which is transmitted back by the optical fiber code; and the main controller is electrically connected with the modem and the wavelength demodulator respectively and is used for realizing the identification of the optical fiber codes. In the embodiment, a plurality of high-power light sources with different wavelength bands are selected as light sources and then coupled by using a wavelength division multiplexer, so that the light sources with large bandwidth and high power are realized, a modem capable of bearing high light intensity is adopted as a pulse generator to output pulse light waves with large bandwidth and high power, and a wavelength demodulator is used for collecting wavelength and energy, so that long-distance optical fiber coding detection is realized.
Description
Technical Field
The utility model relates to an optical fiber communication field, in particular to optical fiber coding identification system based on modulation mode.
Background
In the field of optical fiber communication, an optical fiber coding is used as a technical means for unique identification of an optical fiber medium and consists of a plurality of optical fiber gratings with different wavelengths, and an optical fiber coding identification system is an optical detection system for accurately identifying the wavelengths of the optical fiber gratings. The SOA optical switch used in the detection has a certain limit to the maximum input light intensity, which causes the detection distance of the system to be limited.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an optical fiber code identification system based on modulation mode can realize long distance optical fiber code and survey.
According to the utility model discloses an optic fibre code identification system based on modulation mode, include: the high-power light source group consists of a plurality of high-power light sources with different wavelength bands; the input end of the wavelength division multiplexer is respectively connected with the high-power light sources with different wavelength bands so as to realize the wavelength coupling of the high-power light source group; the modem is connected with the output end of the wavelength division multiplexer to output high-power pulse light waves; a circulator, wherein the circulator is provided with a first port, a second port and a third port, and the first port is connected with the output end of the modem; the input end of the optical fiber is connected with the second port of the circulator, and the optical fiber is provided with an optical fiber code; the third port of the circulator is connected with a light wave signal which is transmitted back by the optical fiber code; and the main controller is electrically connected with the modem and the wavelength demodulator respectively and is used for realizing the identification of the optical fiber codes.
According to the utility model discloses optical fiber code identification system based on modulation mode of first embodiment has following beneficial effect at least: in the embodiment, a plurality of high-power light sources with different wavelength bands are selected as light sources and then coupled by using a wavelength division multiplexer, so that the light sources with large bandwidth and high power are realized, a modem capable of bearing high light intensity is adopted as a pulse generator to output pulse light waves with large bandwidth and high power, and a wavelength demodulator is used for collecting wavelength and energy, so that long-distance optical fiber coding detection is realized.
According to some embodiments of the utility model, based on the optical fiber code identification system of modulation mode still include with the current controller that main control unit connects, current controller respectively with the high-power light source of a plurality of different wavelength bands is connected in order to control input current.
According to some embodiments of the utility model, the optical fiber code identification system based on modulation mode still including setting up the wavelength demodulator with SOA photoswitch between the third port of circulator, SOA photoswitch with main control unit connects.
According to some embodiments of the present invention, the wavelength band of the high power light source group is consistent with the wavelength number of the optical fiber code component.
According to some embodiments of the invention, the main controller adopts FPGA.
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 optical fiber encoding and identifying system according to an embodiment of the present invention.
Reference numerals:
the high-power light source group 100, the wavelength division multiplexer 200, the modem 300, the circulator 400, the optical fiber 500, the optical fiber code 510, the wavelength demodulator 600, the main controller 700, the current controller 800 and the SOA optical switch 900.
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 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 drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, 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 there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1, a modulation scheme-based optical fiber coding identification system according to an embodiment of the present invention includes: the high-power light source group 100 consists of a plurality of high-power light sources with different wavelength bands; a wavelength division multiplexer 200, the input end of which is respectively connected with the plurality of high-power light sources with different wavelength bands to realize the wavelength coupling of the high-power light source group 100; a modem 300 connected to an output terminal of the wavelength division multiplexer 200 to output a high-power pulse light wave; a circulator 400, wherein the circulator 400 has a first port, a second port and a third port, and the first port is connected with the output terminal of the modem 300; the input end of the optical fiber 500 is connected with the second port of the circulator 400, and the optical fiber 500 is provided with an optical fiber code 510; a wavelength demodulator 600, the third port of the circulator 400 is connected to receive the optical wave signal returned by the optical fiber encoder 510; the main controller 700 is electrically connected to the modem 300 and the wavelength demodulator 600, respectively, for identifying the fiber code 510.
The working process is that the high-power light source group 100 outputs a plurality of high-power light wave signals with different wavelength bands, the high-power light wave signals enter the wavelength division multiplexer 200 to realize wavelength coupling of the high-power light source group, the modem 300 controlled by the main controller 700 converts the coupled high-power light wave signals into high-power pulse light waves to be output, the high-power pulse light waves enter through the first port of the circulator 400, the second port of the circulator 400 outputs the high-power pulse light waves to the optical fiber code 510 on the optical fiber 500, the optical fiber code 510 transmits back reflection and scattering light wave signals with unique identification characteristics, the reflection and scattering light wave signals sequentially pass through the second port of the circulator 400 and the third port of the circulator 400 to the wavelength demodulator 600, and the wavelength demodulator 600 can detect the reflection and scattering light wave signals and feed back the reflection and scattering light wave signals to the main controller 700 to identify.
As described above, in the present embodiment, a plurality of high-power light sources with different wavelength bands are selected as light sources, and then are coupled by using a wavelength division multiplexer, so as to implement a light source with a large bandwidth and a large power, a modem capable of bearing a large light intensity is adopted as a pulse generator to output a pulse light wave with a large bandwidth and a large power, and a wavelength demodulator is used to collect wavelength and energy, so as to implement long-distance optical fiber coded detection.
In some embodiments of the present invention, the optical fiber coding recognition system based on the modulation mode further includes a current controller 800 connected to the main controller 700, the current controller 800 is respectively connected to the high-power light sources with different wavelength bands to control the input current, so as to control the output light intensity of the high-power light source group.
Because optic fibre retro-reflection and scattering light wave are less strong, in some embodiments of the utility model, optic fibre code identification system based on modulation mode still including setting up wavelength demodulation appearance 600 with SOA photoswitch 900 between the third port of circulator 400, SOA photoswitch 900 with master controller 700 connects, and wavelength demodulation appearance 600 is given through SOA photoswitch 900's amplification and pulse modulation input, is favorable to accurately discerning optic fibre code 510's wavelength and energy.
The utility model discloses an in some embodiments, the wavelength section of high-power light source group 100 is unanimous with the optical fiber code composition wavelength quantity, and optical fiber code 510 carries out the wavelength marshalling according to the high-power light source wave band of selecting, can improve the rate of accuracy that optical fiber code discerned.
In some embodiments of the present invention, the main controller 700 employs an FPGA.
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 present 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 present 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 (5)
1. An optical fiber coding identification system based on a modulation mode is characterized in that: comprises that
The high-power light source group (100) consists of a plurality of high-power light sources with different wavelength bands;
the input end of the wavelength division multiplexer (200) is respectively connected with the high-power light sources with different wavelength bands to realize the wavelength coupling of the high-power light source group (100);
the modem (300) is connected with the output end of the wavelength division multiplexer (200) to output high-power pulse light waves;
a circulator (400), wherein the circulator (400) is provided with a first port, a second port and a third port, and the first port is connected with the output end of the modem (300);
the input end of the optical fiber (500) is connected with the second port of the circulator (400), and an optical fiber code (510) is arranged on the optical fiber (500);
a wavelength demodulator (600), wherein the third port of the circulator (400) is connected to receive the optical wave signal transmitted back by the optical fiber code (510);
and the main controller (700) is electrically connected with the modem (300) and the wavelength demodulator (600) respectively and is used for realizing the identification of the optical fiber code (510).
2. The modulation-based optical fiber code recognition system according to claim 1, wherein: the LED light source further comprises a current controller (800) connected with the main controller (700), and the current controller (800) is respectively connected with the plurality of high-power light sources with different wavelength bands to control input current.
3. The modulation-based optical fiber code recognition system according to claim 1, wherein: the wavelength demodulator (600) and the circulator (400) are arranged in a cavity, the wavelength demodulator further comprises an SOA optical switch (900) arranged between the wavelength demodulator (600) and the third port of the circulator (400), and the SOA optical switch (900) is connected with the main controller (700).
4. The modulation-based optical fiber code recognition system according to claim 1 or 2, wherein: the wavelength band of the high-power light source group (100) is consistent with the wavelength quantity of the optical fiber coding composition.
5. The modulation-based optical fiber code recognition system according to claim 1 or 3, wherein: the main controller (700) adopts an FPGA.
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| CN202021494705.0U CN212620789U (en) | 2020-07-24 | 2020-07-24 | Optical fiber code identification system based on modulation mode |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117768018A (en) * | 2023-12-22 | 2024-03-26 | 北京交科公路勘察设计研究院有限公司 | Expressway optical cable digital monitoring and intelligent application system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117768018A (en) * | 2023-12-22 | 2024-03-26 | 北京交科公路勘察设计研究院有限公司 | Expressway optical cable digital monitoring and intelligent application system and method |
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