CN104253645A - Safety monitoring device and method of distributed fiber Raman amplifier - Google Patents
Safety monitoring device and method of distributed fiber Raman amplifier Download PDFInfo
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- CN104253645A CN104253645A CN201310266289.7A CN201310266289A CN104253645A CN 104253645 A CN104253645 A CN 104253645A CN 201310266289 A CN201310266289 A CN 201310266289A CN 104253645 A CN104253645 A CN 104253645A
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Abstract
The invention discloses a safety monitoring device of a distributed fiber Raman amplifier. The safety monitoring device comprises an intelligent control system which comprises an optical power splitter, two etalons, two optical detectors and a computing control module. An output end of the optical power splitter is connected with input ends of the two etalons; output ends of the two etalons are respectively connected with an input end of one optical detector; and output ends of the optical detectors are connected with the computing control module. The invention further discloses a safety monitoring method of the distributed fiber Raman amplifier. The safety monitoring device and method has the advantages of low cost, implementing easiness and convenience in popularization and commercialization; besides, with small environmental effect, the signal scanning is a dynamic process and the Raman amplifier is switched on and off dynamically, intelligently and quickly in real time; thus, personal safety and system security are protected and interference to systems from ineffective signals is avoided.
Description
Technical field
?the present invention relates to optical communication field, particularly relate to distributed optical fiber Raman amplifier field.
Background technology
Fiber amplifier is module crucial in light communication system, along with 40Gb/s light communication system starts a large amount of deployment, the practical application of 100Gb/s and even 400Gb/s system is also brought into schedule gradually, estimate that following 40Gb/s to have gone up in system more than 50% and needed to use fiber Raman amplifier or mixer amplifier (raman amplifier and erbium-doped fiber amplifier combinationally use), this is because raman amplifier has low noise, high bandwidth, the feature of low nonlinear effects.
Fiber Raman amplifier generally adopts distributed air-defense, namely amplification process utilizes Raman effect to complete on the transmission fiber, relative to traditional discrete erbium-doped fiber amplifier, raman amplifier requires higher pumping launched power, due to distributed characteristic, input optical signal power detection cannot complete in inside modules, thus new problem served by band: 1) when Transmission Fibers ruptures, because inside modules cannot detect this information, pumping can be in open mode always, and this all can cause very large potential safety hazard for user and environment; 2) when signal transmission is lost, Raman effect still can produce spontaneous emission light, and these spontaneous radiations can be amplified step by step by post-amplifier, finally arrives receiving terminal and causes severe jamming to system.In order to overcome the above problems, Chinese patent CN1404237A describes a kind of method utilizing Interleaver device separate signal light and spontaneous emission light, can effectively overcome the above problems, but it is high that its shortcoming is cost, package dimension is large, is unfavorable for the small form factor requirements of extensive use and following module; And US Patent No. .6,423,963 utilize extra monitor channel to judge the break-make of optical fiber, but cannot judge the presence or absence of flashlight, and not all light communication system has loading monitor channel, the practicality of this method and versatility are very limited.
Summary of the invention
The invention provides a kind of safety monitoring assembly and method of distributed optical fiber Raman amplifier, by by after the etalon of two-beam monitor signal respectively through different output channel, the light signal of output contrasts, thus judges noly there is useful signal input.Overcome Problems existing in above-mentioned technology, cost is low, is easy to realize, and is convenient to promote and commercialization.
The present invention realizes by the following technical solutions: a kind of safety monitoring assembly of distributed optical fiber Raman amplifier, comprise an intelligent control system, system comprises a luminous-power distributor, two etalons, two optical detectors and operation control module, the output of described luminous-power distributor connects the input of two etalons, the output of two etalons connects the input of a photo-detector respectively, the output concatenation operation control module of photo-detector.
Preferably, described two etalons identical through peak shape, and Free Spectral Range is identical, is all 50GHz.
Further, a described etalon aim at the ITU-T-T channel central frequency at 50GHz interval through peak, and with another etalon through peak relativity shift 25GHz.
Further, described luminous-power distributor is the optical splitter of 50:50.
A safety monitoring method for distributed optical fiber Raman amplifier, comprises the following steps:
Step one, optical pilot signal is divided into two-beam detection signal;
Output light, respectively through after the etalon through peak relativity shift, is converted to the signal of telecommunication by step 2, two-beam detection signal;
Step 3, operation control module, according to the comparing result of the signal of telecommunication, control pump laser and open or close.
Preferably, in step 2, wherein light beam detection signal exports ASE light after etalon.
Preferably, in step 33, the signal of telecommunication is carried out calculus of differences by operation control module, and compares with the threshold value of setting.
Cost of the present invention is low, is easy to realize, and is convenient to promote and commercialization; Affected by environment little, signal scanning is a dynamic process, realizes the dynamic of raman amplifier, and in real time, intelligence, opens and closes fast, thus protect the person and system safety, prevent system to be disabled signal disturbing simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of raman amplifier;
Fig. 2 is the structure principle chart of specific embodiments of the invention;
drawing reference numeral illustrates: 1, Transmission Fibers; 2, wavelength division multiplexer; 3, light splitting coupler; 4, intelligent control system; 5, pumping laser group; 6, pump light; 7, input optical signal; 8, output; 9, signal; 10, optical pilot signal; 11, control signal; 12, pumping input; 13, luminous-power distributor; 14, etalon; 15, etalon; 16, operation control module; 17, photo-detector; 18, photo-detector; 19, output optical signal; 20, output optical signal; 21, light detection signal; 22, light detection signal; 23, the signal of telecommunication; 24, the signal of telecommunication.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
As shown in Figure 1, distributed optical fiber Raman amplifier application is in fiber optic communication systems described.Transmission Fibers 1 connects with wavelength division multiplexer 2 input, and wavelength division multiplexer 2 is three fiber port devices, and its pumping input 12 is connected with pumping laser group 5 output; Its signal output part 8 is connected with light splitting coupler 3, light splitting coupler 3 has two outputs, an output is for exporting the signal after amplification 9, and another output is connected with intelligent control system 4, and intelligent control system 4 controls the Kai Heguan of pumping laser group 5 by detecting optical pilot signal 10.
Concrete process is as follows: input optical signal 7 is forward transmission in Transmission Fibers 1, pump light 6 reverse transfer, input optical signal 7 is exaggerated through Raman effect under the effect of pump light 6 in Transmission Fibers 1, flashlight after amplification enters into light splitting coupler 3 after wavelength division multiplexer 2, flashlight after amplification is divided into two bundles by light splitting coupler 3, one end that vast scale exports exports as output signal 9, one end that small scale exports enters intelligent control system 4 as optical pilot signal 10, intelligent control system 4 utilizes optical pilot signal 10 to judge, if the result judged is less than the threshold value of setting, then illustrate that input optical signal 7 is all ASE noise, intelligent detecting system 4 will send signal 11 and close pumping laser group 5, if the result judged is larger than the threshold value of setting, then illustrating in input optical signal 7 has signal to exist, intelligent control system 4 will send control signal 11 and open pumping laser group 5, and wherein no matter whether pumping laser group 5 opens or closes, and intelligent control system 4 will be always in running order.
As shown in Figure 2, description is the structure principle chart of the intelligent control system of raman amplifier.Based Intelligent Control is that 4 turnkeys draw together a luminous-power distributor 13, two etalons 14 and 15, two optical detectors 17 and 18, operation control module 16.The output of luminous-power distributor 13 connects the input of two etalons 14 and 15, and the output of two etalons connects the input of a photo-detector respectively, the output concatenation operation control module 16 of photo-detector.The optical splitter of the general 50:50 of luminous-power distributor 13, also can adopt the device of other ratios certainly as required.Photo-detector 17 and 18 is welded on main control board, and light signal is converted to the signal of telecommunication by photo-detector, then carries out calculus of differences through operation control module 16, and compares and dynamic implement intelligent switch pumping laser group according to the threshold value with setting.Wherein, etalon 15 aim at the ITU-T-T channel central frequency at 50GHz interval through peak, and with etalon 14 through peak relativity shift 25GHz.Two etalons identical through peak shape, and Free Spectral Range is identical.For dwdm optical communication transmission system, carrier frequency is all fixed on ITU-T-T grid passage, and its frequency interval is all fixed as 50GHz or 100GHz.
When there is signal input in ITU-T passage any in system, the optical standard tool aiming at ITU-T-T grid passage will through flashlight, and another road optical standard tool can only through ASE noise power, due to the requirement of OSNR, whenever signal power level is always higher than ASE power level, so when there being flashlight to exist, the luminous power that two-way optical power detector detects will have remarkable difference naturally, thus can setting threshold, when the difference of the luminous power that two-way detects is greater than the threshold values of setting, system thinks there is flashlight thus open Pump; Otherwise, when there is not flashlight, the unlatching of Pump can produce continuous print ASE light, because ASE spectrum be continuous print and among a small circle near flat, so two-way etalon through luminous power substantially equal, the two difference is lower than threshold value, and now system thinks transmission line no signal light and quick closedown Pump, thus ensure that the safety of system and device.
Also have a kind of safety monitoring method of distributed optical fiber Raman amplifier, comprise the following steps:
Step one, optical pilot signal is divided into two-beam detection signal;
Output light, respectively through after the etalon through peak relativity shift, is converted to the signal of telecommunication by step 2, two-beam detection signal;
Step 3, operation control module, according to the comparing result of the signal of telecommunication, control pump laser and open or close.
The detailed process that the safety monitoring of distributed optical fiber Raman amplifier realizes is as follows:
Optical pilot signal 10 is divided into light detection signal 21 and light detection signal 22 after luminous-power distributor 13, two-beam monitor signal is respectively through fixing optical standard tool 14 and etalon 15, wherein established standards tool 15 aim at the ITU-T-T channel central frequency at 50GHz interval through peak, and with etalon 14 through peak relativity shift 25GHz.Two etalons identical through peak shape, and Free Spectral Range is identical.When there is ITU-T signal in optical pilot signal 10, light detecting signal 21 is after etalon 14, the flashlight in ITU-T passage and the ASE in this passage is included in output optical signal 19, and converted to the signal of telecommunication 23 in proportion by photodetector 17, equally, another road light detecting signal 22 can only export ase signal light 20 after etalon 15, and converts the signal of telecommunication 24 in proportion to through photodetector 18; The signal of telecommunication 23 and 24 carries out calculus of differences in operation control module 16 inside, and the threshold value of its operation result and setting compares, and exports according to comparative result the opening and closing that control signal 11 is used for controlling pumping laser group 5.The above course of work can reality principle be: be all the ASE light time when there is not ITU-T flashlight in optical pilot signal 10, the ASE noise spectrum of raman amplifier be continuous print and among a small circle near flat, thus through the output optical signal 19 and 20 luminous power approximately equal of two etalons, the result of carrying out calculus of differences after the two is converted into the signal of telecommunication 23 and 24 is very little, it is made significantly to be less than threshold value, now think that no signal light exists or line fault in key light light path 1, exports the signal of closing pumping laser group 5; And when there is any ITU-T channel signal light in optical pilot signal 10, the luminous power of output optical signal 19 will significantly be greater than the luminous power of output optical signal 20, the result of the two calculus of differences will be very large, it is made to be greater than setting threshold, now think have flashlight existence or line fault recovery in main optical path 1, export the signal opening pumping laser group 5.Can realize the dynamic of raman amplifier by above functional module, in real time, intelligence, opens and closes fast, thus protects the person and system safety, prevent system to be disabled signal disturbing simultaneously.
Although specifically show in conjunction with preferred embodiment and describe the present invention; but those skilled in the art should be understood that; not departing from the spirit and scope of the present invention that appended claims limits; in the form and details the present invention is made a variety of changes, be protection scope of the present invention.
Claims (7)
1. the safety monitoring assembly of a distributed optical fiber Raman amplifier, it is characterized in that, comprise an intelligent control system, system comprises a luminous-power distributor, two etalons, two optical detectors and operation control module, the output of described luminous-power distributor connects the input of two etalons, the output of two etalons connects the input of a photo-detector respectively, the output concatenation operation control module of photo-detector.
2. the safety monitoring assembly of a kind of distributed optical fiber Raman amplifier as claimed in claim 1, is characterized in that, described two etalons identical through peak shape, and Free Spectral Range is identical.
3. the safety monitoring assembly of a kind of distributed optical fiber Raman amplifier as claimed in claim 2, it is characterized in that, a described etalon aim at the ITU-T-T channel central frequency at 50GHz interval through peak, and with another etalon through peak relativity shift 25GHz.
4. the safety monitoring assembly of a kind of distributed optical fiber Raman amplifier as claimed in claim 3, is characterized in that, described luminous-power distributor is the optical splitter of 50:50.
5. a safety monitoring method for distributed optical fiber Raman amplifier, is characterized in that, comprises the following steps:
Step one, optical pilot signal is divided into two-beam detection signal;
Output light, respectively through after the etalon through peak relativity shift, is converted to the signal of telecommunication by step 2, two-beam detection signal;
Step 3, operation control module, according to the comparing result of the signal of telecommunication, control pump laser and open or close.
6. the safety monitoring method of a kind of distributed optical fiber Raman amplifier as claimed in claim 5, is characterized in that, in step 2, wherein light beam detection signal exports ASE light after etalon.
7. the safety monitoring method of a kind of distributed optical fiber Raman amplifier as claimed in claim 5, is characterized in that, in step 3, the signal of telecommunication is carried out calculus of differences by operation control module, and compares with the threshold value of setting.
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| CN201310266289.7A CN104253645A (en) | 2013-06-28 | 2013-06-28 | Safety monitoring device and method of distributed fiber Raman amplifier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113810106A (en) * | 2021-08-26 | 2021-12-17 | 广东工业大学 | Safety monitoring method and device of optical fiber energy information common transmission system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113810106A (en) * | 2021-08-26 | 2021-12-17 | 广东工业大学 | Safety monitoring method and device of optical fiber energy information common transmission system |
| CN113810106B (en) * | 2021-08-26 | 2022-06-21 | 广东工业大学 | Safety monitoring method and device of optical fiber energy information common transmission system |
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Application publication date: 20141231 |