CN105610513B - A kind of chaotic laser light emitter detected for communication cabinet fault - Google Patents
A kind of chaotic laser light emitter detected for communication cabinet fault Download PDFInfo
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- CN105610513B CN105610513B CN201510959515.9A CN201510959515A CN105610513B CN 105610513 B CN105610513 B CN 105610513B CN 201510959515 A CN201510959515 A CN 201510959515A CN 105610513 B CN105610513 B CN 105610513B
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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
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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
- H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
- H04B10/0771—Fault location on the transmission path
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- Semiconductor Lasers (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The present invention relates to communication cabinet fault detection technique, specifically a kind of chaotic laser light emitter detected for communication cabinet fault.The present invention solve existing chaotic laser light generation device produced by chaotic laser light low frequency energy accounting it is low, the problem of frequency spectrum flatness is poor.A kind of chaotic laser light emitter detected for communication cabinet fault, including semiconductor laser, Polarization Controller, 1 × 2 main fiber coupler, optical attenuator, optical fiber feedback mirrors, optoisolator, image intensifer, low-frequency enhancement devices；Wherein, the input connection of the output end of semiconductor laser and Polarization Controller；The output end of Polarization Controller is connected with the input of 1 × 2 main fiber coupler；Two output ends of 1 × 2 main fiber coupler are connected with the input of optical attenuator and the input of optoisolator respectively；The output end of optical attenuator is connected with the input of optical fiber feedback mirrors.The present invention is applied to the detection of communication cabinet fault.
Description
Technical field
It is specifically that one kind is used for communication cable the present invention relates to the chaotic laser light generation technology in communication cabinet fault detection
The chaotic laser light emitter of fault detect.
Background technology
In recent years, communication cable has been widely used in aircraft, ship as control signal, the transmission medium of communication signal
In the equipment such as oceangoing ship, motor-car, spaceship.During practice, communication cable can be because its working environment is special, circuit is old
Change etc. reason and produce failure, the lighter causes electrical equipment to be stopped, and severe one causes aircraft, ship, motor-car, spaceship etc.
Generation accident.Therefore, the accurately detection of communication cabinet fault is extremely important.At present, the detection of communication cabinet fault is mainly logical
Reflectrometry realization is crossed, and the generation of chaotic laser light is to realize high-precision, detection over long distances head using reflectrometry
Want link（Wang A, Zhang M, Xu H, et al. Location of wire faults using chaotic
signal[J]. Electron Device Letters, IEEE, 2011, 32(3): 372-374.）.
Existing chaotic laser light generation device is limited by self structure, and produced chaotic laser light has low frequency energy and accounted for
Than it is low, frequency spectrum flatness is poor the problem of, thus bring following problem：In reflectrometry, due to handling the electricity of chaotic laser light
Son response device is low pass device（Only the low frequency energy in chaotic laser light is allowed to pass through）, cause only to use in practical application
The fraction energy of chaotic laser light, thus causes the capacity usage ratio of chaotic laser light low, so as to cause the failure of reflectrometry
Detect that accuracy is low（Xu Hang, Wang Anbang, Han Xiaohong, wait chaotic signal correlation measurement dielectric transmission lines breakpoint and
Impedance mismatching [J] Acta Physica Sinicas, 2011,60 (9): 142-147.）.Based on this, it is necessary to invent a kind of brand-new chaos
Laser generator, to solve, chaotic laser light low frequency energy accounting produced by existing chaotic laser light generation device is low, frequency spectrum is put down
The problem of smooth degree difference.
The content of the invention
Chaotic laser light low frequency energy accounting produced by existing chaotic laser light generation device is low, frequency spectrum in order to solve by the present invention
There is provided a kind of chaotic laser light emitter detected for communication cabinet fault for the problem of flatness is poor.
The present invention adopts the following technical scheme that realization：A kind of chaotic laser light transmitting detected for communication cabinet fault
Device, including it is semiconductor laser, Polarization Controller, 1 × 2 main fiber coupler, optical attenuator, optical fiber feedback mirrors, optically isolated
Device, image intensifer, low-frequency enhancement devices；Wherein, the input connection of the output end of semiconductor laser and Polarization Controller；Partially
The output end of controller of shaking is connected with the input of 1 × 2 main fiber coupler；Two output ends of 1 × 2 main fiber coupler point
It is not connected with the input of optical attenuator and the input of optoisolator；The output end of optical attenuator and the input of optical fiber feedback mirrors
End connection；The output end of optoisolator and the input of image intensifer are connected；The output end and low-frequency enhancement devices of image intensifer
Input connection.
Specific work process is as follows：The continuous light of semiconductor laser output is successively through Polarization Controller, 1 × 2 main fiber
Coupler, optical attenuator reach optical fiber feedback mirrors, and return to semiconductor laser along original optical path after the reflection of optical fiber feedback mirrors, so
Noise spectra of semiconductor lasers causes disturbance afterwards, so that semiconductor laser output spectrum is uneven and the mixed of band logical spectrum shape is presented
Ignorant laser.The chaotic laser light reaches image intensifer, and passed through through Polarization Controller, 1 × 2 main fiber coupler, optoisolator successively
Image intensifer is amplified into low-frequency enhancement devices, output low frequency energy accounting height, frequency after then being filtered through low-frequency enhancement devices
Compose the good chaotic laser light of flatness.
It is of the present invention a kind of for communication cable compared with existing chaotic laser light generation device based on said process
The chaotic laser light emitter of fault detect generates low frequency energy accounting higher by using brand new（In 1GHz bandwidth
The low frequency energy accounting that adds in 30 times or so, 3GHz bandwidth of low frequency energy accounting add 6 times or so）, spectral flatness
Degree is more preferable（Frequency spectrum flatness in 3GHz is positively retained within ± 1.5dB, and the lifting amplitude of frequency spectrum flatness is more than 15dB, such as
Shown in Fig. 3）Chaotic laser light, the capacity usage ratio of chaotic laser light thus greatly improved, so that reflection measurement greatly improved
The fault detect accuracy of method.
The present invention is rational in infrastructure, ingenious in design, and the chaos produced by efficiently solving existing chaotic laser light generation device swashs
The problem of light low frequency energy accounting is low, frequency spectrum flatness is poor, it is adaptable to the detection of communication cabinet fault.
Brief description of the drawings
Fig. 1 is the first structural representation of the present invention.
Fig. 2 is second of structural representation of the present invention.
Fig. 3 is the spectrum diagram for the chaotic laser light that the present invention is produced.
In figure：1- semiconductor lasers, 2- Polarization Controllers, the main fiber coupler of 3-1 × 2,4- optical attenuators, 5- optical fiber
Feedback mirrors, 6- optoisolators, 7- image intensifers, 8- fiber gratings, 9- the one 1 × 2nd from fiber coupler, 10- the 21 × 2nd from
Fiber coupler, the fiber gratings of 11- first, the fiber gratings of 12- second, the fiber gratings of 13- the 3rd.
Embodiment
Embodiment one
A kind of chaotic laser light emitter detected for communication cabinet fault, including semiconductor laser 1, Polarization Control
Device 2,1 × 2 main fiber coupler 3, optical attenuator 4, optical fiber feedback mirrors 5, optoisolator 6, image intensifer 7, low-frequency enhancement devices；
Wherein, the output end of semiconductor laser 1 is connected with the input of Polarization Controller 2；The output end of Polarization Controller 2 and 1 × 2
The input connection of main fiber coupler 3；The input of two output ends of 1 × 2 main fiber coupler 3 respectively with optical attenuator 4
The input of end and optoisolator 6 is connected；The output end of optical attenuator 4 is connected with the input of optical fiber feedback mirrors 5；Optoisolator
6 output end is connected with the input of image intensifer 7；The output end of image intensifer 7 and the input of low-frequency enhancement devices are connected.
In the present embodiment, as shown in figure 1, the low-frequency enhancement devices include fiber grating 8；The output of image intensifer 7
End is connected with the input of fiber grating 8.During work, chaotic laser light is amplified into fiber grating, Ran Houjing through image intensifer
The chaotic laser light that output low frequency energy accounting is high after fiber grating filtering, frequency spectrum flatness is good.
When it is implemented, the frequency detuning of the centre wavelength of fiber grating 8 and the centre wavelength of semiconductor laser 1 is
Within ± 50GHz, side mode suppression ratio >=20dB, and line width≤300pm.The three dB bandwidth of fiber grating 8 is 200pm.Fiber grating
Also used in WDM-PON Network Fault Detections（IEEE J. Lightw. Technol., Vol. 30, 3420,
2012）, still, fiber grating is the selector as a wavelength in WDM-PON application, it is therefore an objective to make flashlight and net
The wave band matching of each branch road of network, is not related to the change of the Energy distribution to signal optical spectrum.
Embodiment two
A kind of chaotic laser light emitter detected for communication cabinet fault, including semiconductor laser 1, Polarization Control
Device 2,1 × 2 main fiber coupler 3, optical attenuator 4, optical fiber feedback mirrors 5, optoisolator 6, image intensifer 7, low-frequency enhancement devices；
Wherein, the output end of semiconductor laser 1 is connected with the input of Polarization Controller 2；The output end of Polarization Controller 2 and 1 × 2
The input connection of main fiber coupler 3；The input of two output ends of 1 × 2 main fiber coupler 3 respectively with optical attenuator 4
The input of end and optoisolator 6 is connected；The output end of optical attenuator 4 is connected with the input of optical fiber feedback mirrors 5；Optoisolator
6 output end is connected with the input of image intensifer 7；The output end of image intensifer 7 and the input of low-frequency enhancement devices are connected.
In the present embodiment, as shown in Fig. 2 the low-frequency enhancement devices include the one 1 × 2nd from fiber coupler 9, second
1 × 2 from fiber coupler 10, the first fiber grating 11, the second fiber grating 12, the 3rd fiber grating 13；Image intensifer 7 it is defeated
Go out end to be connected from the input of fiber coupler 9 with the one 1 × 2nd；One 1 × 2nd distinguishes from two output ends of fiber coupler 9
It is connected with the 21 × 2nd from the input of fiber coupler 10 and the input of the first fiber grating 11；21 × 2nd from optical fiber coupling
Two output ends of clutch 10 are connected with the input of the second fiber grating 12 and the input of the 3rd fiber grating 13 respectively.Work
When making, chaotic laser light is amplified into the one 1 × 2nd from fiber coupler through image intensifer, then through the one 1 × 2nd from optical fiber coupling
Clutch is divided into two-way：The chaos that output low frequency energy accounting is high after the first via is filtered through the first fiber grating, frequency spectrum flatness is good
Laser；Second tunnel the 21 × 2nd is again split into two-way from fiber coupler：The first via is exported after being filtered through the second fiber grating
The chaotic laser light that low frequency energy accounting is high, frequency spectrum flatness is good；Output low frequency energy after second tunnel is filtered through the 3rd fiber grating
The chaotic laser light that accounting is high, frequency spectrum flatness is good.In the process, if by the first fiber grating, the second fiber grating, the 3rd light
The bandwidth of fine grating is set to different value, then can be with output spectrum flatness difference, low frequency energy accounting and spectral bandwidth
The chaotic laser light of tune, so that chaotic laser light is applied to the capture card of different bandwidth, so as to further increase chaotic laser light
Capacity usage ratio.
When it is implemented, the centre wavelength of the first fiber grating 11, the centre wavelength of the second fiber grating 12, the 3rd optical fiber
The frequency detuning of the centre wavelength of grating 13 and the centre wavelength of semiconductor laser 1 is Side mode suppressing within ± 50GHz
Than >=20dB, and line width≤300pm.The three dB bandwidth of first fiber grating 11 is 50pm.The three dB bandwidth of second fiber grating 12
For 150pm.The three dB bandwidth of 3rd fiber grating 13 is 250pm, and coupling ratio is 50：50.Fiber grating is in the event of WDM-PON networks
Also used in barrier detection（IEEE J. Lightw. Technol., Vol. 30, 3420, 2012）, still, in WDM-
Fiber grating is the selector as a wavelength in PON application, it is therefore an objective to make the wave band of each branch road of flashlight Yu network
Matching, is not related to the change of the Energy distribution to signal optical spectrum.
Claims (4)
1. a kind of chaotic laser light emitter detected for communication cabinet fault, it is characterised in that：Including semiconductor laser
（1）, Polarization Controller（2）, 1 × 2 main fiber coupler（3）, optical attenuator（4）, optical fiber feedback mirrors（5）, optoisolator（6）、
Image intensifer（7）, low-frequency enhancement devices；Wherein, semiconductor laser（1）Output end and Polarization Controller（2）Input
Connection；Polarization Controller（2）Output end and 1 × 2 main fiber coupler（3）Input connection；1 × 2 main fiber coupler
（3）Two output ends respectively with optical attenuator（4）Input and optoisolator（6）Input connection；Optical attenuator（4）
Output end and optical fiber feedback mirrors（5）Input connection；Optoisolator（6）Output end and image intensifer（7）Input
Connection；Image intensifer（7）Output end and low-frequency enhancement devices input connect；
The low-frequency enhancement devices include the one 1 × 2nd from fiber coupler（9）, the 21 × 2nd from fiber coupler（10）, first
Fiber grating（11）, the second fiber grating（12）, the 3rd fiber grating（13）；Image intensifer（7）Output end and the one 1 × 2nd
From fiber coupler（9）Input connection；One 1 × 2nd from fiber coupler（9）Two output ends respectively with the 21 × 2nd
From fiber coupler（10）Input and the first fiber grating（11）Input connection；21 × 2nd from fiber coupler
（10）Two output ends respectively with the second fiber grating（12）Input and the 3rd fiber grating（13）Input connection.
2. a kind of chaotic laser light emitter detected for communication cabinet fault according to claim 1, its feature exists
In：The low-frequency enhancement devices include fiber grating（8）；Image intensifer（7）Output end and fiber grating（8）Input connect
Connect.
3. a kind of chaotic laser light emitter detected for communication cabinet fault according to claim 2, its feature exists
In：Fiber grating（8）Centre wavelength and semiconductor laser（1）Centre wavelength frequency detuning be ± 50GHz within,
Side mode suppression ratio >=20dB, and line width≤300pm.
4. a kind of chaotic laser light emitter detected for communication cabinet fault according to claim 1, its feature exists
In：First fiber grating（11）Centre wavelength, the second fiber grating（12）Centre wavelength, the 3rd fiber grating（13）In
Cardiac wave length and semiconductor laser（1）The frequency detuning of centre wavelength be within ± 50GHz, side mode suppression ratio >=
20dB, and line width≤300pm.
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| CN106169950B (en) * | 2016-07-21 | 2023-08-18 | 西南大学 | Long-distance laser chaos synchronous device based on all optical fibers |
| CN106452601A (en) * | 2016-09-19 | 2017-02-22 | 西安电子科技大学 | Multiway time delay-free characteristic laser chaos signal generation device based on heterogeneous time delay coupling ring network |
| CN110797745B (en) * | 2019-11-12 | 2021-09-17 | 太原理工大学 | Broadband chaos generating device without time delay characteristic |
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| CN1302329C (en) * | 2004-07-09 | 2007-02-28 | 吉林大学 | Gain flattened equalizer of erbium doped fiber amplifier based on chirped fiber grating |
| JP5814200B2 (en) * | 2012-09-10 | 2015-11-17 | 日本電信電話株式会社 | High-speed chaotic optical signal generation optical circuit |
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