CN108879305A - A kind of distant pump pumping source device and control method with OTDR function - Google Patents
A kind of distant pump pumping source device and control method with OTDR function Download PDFInfo
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- CN108879305A CN108879305A CN201810844246.5A CN201810844246A CN108879305A CN 108879305 A CN108879305 A CN 108879305A CN 201810844246 A CN201810844246 A CN 201810844246A CN 108879305 A CN108879305 A CN 108879305A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06754—Fibre amplifiers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
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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
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
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- Signal Processing (AREA)
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- Optical Communication System (AREA)
Abstract
The embodiment of the present invention provides a kind of distant pump pumping source device and control method with OTDR function, and wherein device includes laser cell, circulator and processing unit；Wherein, laser cell is connect with circulator and processing unit respectively；Circulator is used for the first optical signal transmission for issuing laser cell to output optical fibre, and by the second optical signal transmission of output optical fibre return to processing unit；Processing unit is used to control the working condition of laser cell according to the second optical signal, and working condition includes OTDR state and distant pump state.A kind of distant pump pumping source device and control method with OTDR function provided in an embodiment of the present invention, OTDR and distant pumping function are realized by same laser cell, not only save high OTDR equipment cost, solve the problems, such as that engineering staff's on-site test is time-consuming and laborious, it can also realize real-time fibre circuit loss monitoring, avoid due to the unclean existing danger for burning fiber end face of fiber end face.
Description
Technical field
The present embodiments relate to technical field of photo communication more particularly to a kind of distant pump pumping source dresses with OTDR function
It sets and control method.
Background technique
Optical time domain reflectometer (Optical time Domain Reflectometer, OTDR) is the weight in fiber optic communication
Instrument is wanted, the light source of OTDR emits specific light pulse signal, according to reversed Fresnel reflection and Rayleigh scattering principle, reflection
Optical signal back carries out being received and converted into electric signal by light receiving element, carries out data by data processing unit later
Processing, obtain the parameters such as the fibre of surveyed optical fiber is long.OTDR is widely used in the maintenance of lightguide cable link, among construction, can be into
The measurement of row fiber lengths, optical fiber transmission attenuation, connector decaying and fault location etc..
Long haul transmission system at this stage generally all be unable to do without erbium-doped fiber amplifier, raman optical amplifier or two
Person is combined together the Now therefore to all whom it may concern etc. of composition.Before specific Transmission system is opened, need preparatory by OTDR
Detection fiber state.In long distance transmission field application, when optical communication equipment networking, needs to purchase dedicated OTDR and mating
Test device is tested and is monitored to the optical fiber of connection, however Test Networking scheme is complicated, and OTDR equipment is at high price, these
Factor has resulted in the increase of optical-fiber network maintenance cost.
In addition, distant pump pumping source belongs to powerful device, if in system opening process in long haul transmission system
Fiber end face is not clean, then there is the danger for burning fiber end face, in addition need engineering if fiber break in the process of running
Personnel carry OTDR equipment and go on-the-spot test, diagnose the abort situation of route, operate time-consuming and laborious.
Summary of the invention
The embodiment of the present invention provides a kind of distant pump pumping source device and control method with OTDR function, existing to solve
Some OTDR equipments are at high price, the time-consuming and laborious problem of diagnostic operation in long haul transmission system.
On the one hand, the embodiment of the present invention provide it is a kind of with OTDR function distant pump pumping source device, including laser cell,
Circulator and processing unit；
Wherein, laser cell is connect with circulator and processing unit respectively；
Circulator is used for the first optical signal transmission for issuing laser cell to output optical fibre, and by output optical fibre return
Second optical signal transmission is to processing unit；
Processing unit is used to control the working condition of laser cell according to the second optical signal, and working condition includes OTDR state
With distant pump state.
On the other hand, the embodiment of the present invention provides a kind of distant pump pumping operated control method with OTDR function, including：
Control laser cell is transmitted to output optical fibre after issuing the first optical signal to circulator；
Receive the second optical signal that the output optical fibre of circulator transmission returns；
The working condition of laser cell is controlled according to the second optical signal, working condition includes OTDR state and distant pump state.
A kind of distant pump pumping source device and control method with OTDR function provided in an embodiment of the present invention, OTDR and distant
Pumping function is realized by same laser cell, not only saves high OTDR equipment cost, solves the inspection of engineering staff scene
Survey time-consuming and laborious problem, additionally it is possible to realize real-time fibre circuit loss monitoring, avoid not existing completely due to fiber end face
The danger for burning fiber end face.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is that a kind of distant pump with OTDR function of the embodiment of the present invention pumps the structural schematic diagram of source device；
Fig. 2 is the structural schematic diagram that there is a kind of single order of the embodiment of the present invention the distant pump of OTDR function to pump source device；
Fig. 3 is the structural schematic diagram that there is a kind of second order of the embodiment of the present invention the distant pump of OTDR function to pump source device；
Fig. 4 is the structural schematic diagram that there is three rank of one kind of the embodiment of the present invention the distant pump of OTDR function to pump source device；
Fig. 5 is that a kind of distant pump with OTDR function of the embodiment of the present invention pumps the flow diagram of operated control method；
Description of symbols：
101- laser cell；102- circulator；103- processing unit；
104- output optical fibre；201- laser；301- pumping group.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Distant pump (Remote Optically Pumped Amplifier, ROPA) technology is by erbium-doped fiber amplifier
The passive parts such as unpumped section (Remote Pump Unit, RPU) and Er-doped fiber (Remote Gain Unit, RGU) carry out
Separation, the passive parts such as Er-doped fiber (RGU) are placed among route, and unpumped section (RPU) is placed in computer room, are pumped
Pu energy is transmitted to the Er-doped fiber part among route by remote optical fiber, and excitation Er-doped fiber carries out signal amplification,
There is the transmission range of dozens or even hundreds of kilometer between unpumped section and Er-doped fiber.Due to the passive portion being placed among route
Divide and do not need to power, therefore is the effective workaround of long distance transmission.
Current Remote optical pumping amplifier is divided into road Remote optical pumping amplifier and bypass Remote optical pumping amplifier.With road Remote optical pumping amplifier, that is, signal light and pump
Pu light transmits in same root optical fiber, bypasses Remote optical pumping amplifier, that is, signal light and pump light transmits in different optical fiber.It is distant with road
Pumping system and bypass Remote optical pumping amplifier can be applied respectively or be applied simultaneously.The embodiment of the present invention proposes that one kind both can be applied to
With road Remote optical pumping amplifier, the distant pump pumping source device with OTDR function of bypass Remote optical pumping amplifier can also be applied to, Fig. 1 is the present invention
The structural schematic diagram of a kind of distant pump pumping source device with OTDR function of embodiment, as shown in Figure 1, described device includes swashing
Light unit, circulator and processing unit；Wherein, laser cell is connect with circulator and processing unit respectively；Circulator is used for will
The first optical signal transmission that laser cell issues is to output optical fibre, and the second optical signal transmission that output optical fibre is returned is to handling
Unit；Processing unit be used for according to the second optical signal control laser cell working condition, working condition include OTDR state and
Distant pump state.
Specifically, laser cell has two kinds of working conditions, i.e. OTDR state and distant pump state.First under OTDR state
Signal light is OTDR pulse signal, and second signal light is the reflection/scattering light letter generated based on Fresnel reflection or Rayleigh scattering
Number；The first signal light under distant pump state is pump light signals, and second signal light is the reflected light signal of pump light signals.
When laser cell is in OTDR state, the first signal light, that is, OTDR pulse signal that laser cell issues, OTDR
Pulse signal is transmitted through the fiber to circulator, and circulator is by OTDR pulse signal transmission to output optical fibre immediately, herein, output
Optical fiber is to pump the optical fiber that source device is connect with the distant pump described in the embodiment of the present invention with OTDR function, so that OTDR arteries and veins
It rushes in the testing fiber link that signal can be that output optical fibre is connected and propagates.With that is, output optical fibre is believed the second of return
Number light, i.e., the reflection/scattered light signal generated based on Fresnel reflection or Rayleigh scattering are transmitted to circulator, and circulator is will be upper
It states reflection/scattered light signal and is transmitted to processing unit, after processing unit receives reflection/scattered light signal, according to reflection/scattering
Optical signal controls the working condition of laser cell, that is, judges whether the working condition of switched laser unit.
When laser cell is in distant pump state, the first signal light, that is, pump light signals that laser cell issues, pump light
Signal is transmitted through the fiber to circulator, and pump light signals are transmitted to output optical fibre by circulator immediately, and herein, output optical fibre is
With the optical fiber that connect of distant pump pumping source device described in the embodiment of the present invention with OTDR function, enable pump light signals
Enough it is to propagate in testing fiber link that output optical fibre is connected, and Er-doped fiber is motivated to carry out signal amplification.With that is, output
Optical fiber is by the second signal light of return, i.e., the reflected light signal of pump light signals is transmitted to circulator, circulator under distant pump state
Above-mentioned reflected light signal is being transmitted to processing unit, after processing unit receives reflected light signal, according to reflected light signal control
The working condition of laser cell processed judges whether the working condition of switched laser unit.
In the embodiment of the present invention, OTDR and distant pumping function are realized by same laser cell, are not only saved high
OTDR equipment cost solves the problems, such as that engineering staff's on-site test is time-consuming and laborious, additionally it is possible to realize real-time optical fiber cable path loss
Consumption monitoring is avoided due to the unclean existing danger for burning fiber end face of fiber end face.
Based on the above embodiment, a kind of distant pump with OTDR function pumps source device, and laser cell includes that several swash
Light device；When laser cell is in OTDR state, the first optical signal is OTDR pulse signal；Processing unit is based on default OTDR rule
It then controls a corresponding laser in laser cell and issues OTDR pulse signal；When laser cell is in distant pump state, the
One optical signal is pump light signals；Processing unit is based on corresponding one or more sharp in default pumping rule control laser cell
Light device issues pump light signals.
Specifically, laser cell includes several lasers, and the quantity of laser according to concrete application scene and can answer
It is adjusted with demand, the quantity to laser in laser cell and specification do not make specific limit to the embodiment of the present invention.It needs
Bright, when laser cell is in OTDR state, processing unit controls a laser in laser cell and issues OTDR arteries and veins
Signal is rushed, remaining laser in laser cell is in close state, when laser cell is in distant pump state, processing unit control
One or more lasers in laser cell processed issue pump light signals, i.e. OTDR pulse signal is only issued by a laser
Optical signal, and pump light signals then can be by several lasers issue after carry out multiplex optical signal.
Herein, OTDR rule is preset to be used to set in laser cell for emitting the laser of OTDR pulse signal, moreover it is possible to
It is enough in the impulse amplitude of setting transmitting OTDR pulse signal.In addition, default OTDR rule can also be used to setting transmitting OTDR
The pulse width of pulse signal and sampling number etc., the present invention is not especially limit this.Pump is issued under distant pump state
The number of lasers of Pu optical signal can be determined according to practical application scene and application demand, and the light letter that each laser issues
Number wavelength and power require to determine based on default pumping rule.
Based on any of the above-described embodiment, a kind of distant pump pumping source device with OTDR function, if laser cell further includes
Dry polarization multiplexer and/or several wavelength division multiplexers；The pump light that polarization multiplexer is used to issue multiple lasers is believed
Number multiplex is carried out, wavelength division multiplexer carries out multiplex for pump light signals different to wavelength.
Specifically, under distant pump state, processing unit is based in default pumping rule control laser cell corresponding one
Or multiple lasers issue pump light signals.When multiple lasers in processing unit control laser cell are simultaneously emitted by pump light
Signal, and multiplex is carried out by the pump light signals that polarization multiplexer and/or wavelength division multiplexer issue above-mentioned multiple lasers.
Wherein, palarization multiplexing (Polarization Division Multiplexing, PDM) technology is realizing multi beam phase
While same or different wave length optical signal is propagated independently of each other in same root optical fiber, can not only largely it mention
High system communication capacity, moreover it is possible to make system spectrum efficiency be improved significantly.Wavelength-division multiplex (Wavelength Division
Multiplexing, WDM) technology can merge together the optical signal of a variety of different wave lengths, and be coupled to the same of optical link
It is transmitted in a piece optical fiber.
Based on any of the above-described embodiment, a kind of distant pump pumping source device with OTDR function, when laser cell is in
When OTDR state, the second optical signal is Fresnel reflection or reflection/scattered light signal that Rayleigh scattering generates；Processing unit is based on
The size of OTDR pulse signal issues time and reflection/scattered light signal size and receiving time, obtains and connects with output optical fibre
The OTDR testing result of the testing fiber link connect；If OTDR testing result meets default turn on pump condition, processing unit control
Laser cell switches to distant pump state.
Herein, Fresnel reflection originates from the mutation of refractive index, therefore anti-based on the received reflection signal of Fresnel reflection
Catastrophe of optical fiber, such as fibercuts, mechanical connection etc. are saved.Rayleigh scattering refers to that OTDR pulse signal passes in a fiber
Defeated, due to the scattering signatures of optical fiber itself, very weak backscatter signal can be back to circulator.It is received based on Rayleigh scattering
The power of scattered signal reflects the attenuation characteristic of optical fiber.
The OTDR testing result for the testing fiber link connecting with output optical fibre can be the shape including testing fiber end face
Condition and the length of link, loss, decaying and fault location etc., the present invention is not especially limit this.It is obtaining
After OTDR testing result, judge whether OTDR testing result meets default turn on pump condition, if OTDR testing result meets default open
Pump condition, then processing unit control laser cell switches to distant pump state.
Herein, presetting turn on pump condition can be that testing fiber end face is clean and link is in normal condition, can also be to
It surveys optical fiber link and is in the section of corresponding testing result when normal condition, if when OTDR testing result is in normal condition pair
In the testing result section answered, then it is assumed that OTDR testing result meets default turn on pump condition.Alternatively, default turn on pump condition is detection
Whether the as a result threshold value of middle parameters can meet default turn on pump item by parameters threshold decision OTDR testing result
Part.
Based on any of the above-described embodiment, a kind of distant pump pumping source device with OTDR function, when laser cell is in distant
When pump state, the second optical signal is reflected light signal；If reflected light signal is greater than default reflex threshold, processing unit control swashs
Light unit switches to OTDR state.
Specifically, under distant pump state, the size judgement pumping output end face and optical fiber of reflected light signal are typically based on
The signal quality of link.If reflected light signal is greater than default reflex threshold, the optical fiber chain currently connecting with output optical fibre is confirmed
Road is controlled laser cell and switches to OTDR state, to current and output light through the processing unit there are failure or end face be not clean
The optical fiber link of fibre connection carries out fault detection, OTDR testing result is provided, and this information is reported on network management, to safeguard people
Member goes live reparation in time.
If reflected light signal is less than or equal to default reflex threshold, the optical fiber link shape currently connecting with output optical fibre is confirmed
State is normal, and processing unit control laser cell is maintained at distant pump state.
In the embodiment of the present invention, the signal matter for working as front end face and link is obtained by reflected light signal under distant pump state
Amount, it is unclean or link is there may be OTDR mode is switched to when problem in end face, it avoids since end face does not exist completely
Burn the danger of fiber end face.
Based on any of the above-described embodiment, a kind of distant pump pumping source device with OTDR function, processing unit includes photoelectricity
Detector；Photodetector is used to the second optical signal being converted to electric signal.
Specifically, the second optical signal in processing unit is transmitted to by circulator, processing unit is visited by photoelectricity first
It surveys device and is converted to electric signal, be followed by subsequent processing unit and judged whether to need the working condition of switched laser unit according to electric signal.
Further, processing unit carries out analog-to-digital conversion to electric signal, obtains digital signal, then carries out to digital signal
Processing, judges whether the working condition for needing switched laser unit.
Based on any of the above-described embodiment, a kind of distant pump pumping source device with OTDR function, when laser cell is in distant
When pump state, the first optical signal is the pump light signals comprising at least one wavelength.
For example, the structure that there is a kind of single order that Fig. 2 is the embodiment of the present invention the distant pump of OTDR function to pump source device is shown
It is intended to, in distant pump pumping source device as shown in Figure 2, laser cell includes four lasers, and each laser is used to issue
The pump light of 14xx nm, and the pump light that issues of various lasers is by after wavelength division multiplexer (WDM) light combination, via circulator
Output.
Fig. 3 is the structural schematic diagram that there is a kind of second order of the embodiment of the present invention the distant pump of OTDR function to pump source device,
In distant pump pumping source device as shown in Figure 3, laser cell includes two groups of pumping groups, and wherein 14xx pumping group includes several use
In the laser for the pump light for issuing 14xx nm, 13xx pumping group includes that several are used to issue swashing for the pump light of 13xx nm
Light device, the pump light that 14xx pumping group issues the pump light of 14xx nm and 13xx pumping group issues 13xx nm pass through wavelength-division multiplex
After device (WDM) light combination, exported via circulator.Fig. 4 is that there is three rank of one kind of the embodiment of the present invention the distant pump of OTDR function to pump
The structural schematic diagram of Pu source device, as shown in figure 4, laser cell includes three groups of pumping groups, wherein 14xx pumping group includes several
The laser of a pump light for being used to issue 14xx nm, 13xx pumping group include the pump light that several are used to issue 13xx nm
Laser, 12xx pumping group include several be used for issue 12xx nm pump light laser, 14xx pumping group issue
The pump light of 14xx nm, 13xx pumping group issue the pump light of 13xx nm and the pump light of 12xx pumping group sending 12xx nm
After wavelength division multiplexer (WDM) light combination, exported via circulator.
Based on any of the above-described embodiment of the method, Fig. 5 is a kind of distant pump pumping with OTDR function of the embodiment of the present invention
The flow diagram of operated control method, as shown in figure 5, a kind of distant pump with OTDR function pumps operated control method, including：
501, processing unit control laser cell is transmitted to output optical fibre after issuing the first optical signal to circulator.
Specifically, laser cell has two kinds of working conditions, i.e. OTDR state and distant pump state.First under OTDR state
Signal light is OTDR pulse signal, and the first signal light under distant pump state is pump light signals.
When laser cell is in OTDR state, the first signal light, that is, OTDR pulse signal that laser cell issues, OTDR
Pulse signal is transmitted through the fiber to circulator, and circulator is by OTDR pulse signal transmission to output optical fibre immediately, herein, output
Optical fiber is to pump the optical fiber that source device is connect with the distant pump described in the embodiment of the present invention with OTDR function, so that OTDR arteries and veins
It rushes in the testing fiber link that signal can be that output optical fibre is connected and propagates.
When laser cell is in distant pump state, the first signal light, that is, pump light signals that laser cell issues, pump light
Signal is transmitted through the fiber to circulator, and pump light signals are transmitted to output optical fibre by circulator immediately, and herein, output optical fibre is
With the optical fiber that connect of distant pump pumping source device described in the embodiment of the present invention with OTDR function, enable pump light signals
Enough it is to propagate in testing fiber link that output optical fibre is connected, and Er-doped fiber is motivated to carry out signal amplification.
502, processing unit receives the second optical signal that the output optical fibre of circulator transmission returns.
Specifically, when laser cell is in OTDR state, second signal light is based on Fresnel reflection or Rayleigh scattering
Reflection/scattered light signal of generation.Output optical fibre is by the second signal light of return, i.e., raw based on Fresnel reflection or Rayleigh scattering
At reflection/scattered light signal be transmitted to circulator, above-mentioned reflection/scattered light signal is being transmitted to processing unit by circulator,
Processing unit receives reflection/scattered light signal.
When laser cell is in distant pump state, second signal light is the reflected light signal of pump light signals.Output optical fibre
By the second signal light of return, i.e., the reflected light signal of pump light signals is transmitted to circulator under distant pump state, and circulator will be will
Above-mentioned reflected light signal is transmitted to processing unit, and processing unit receives reflected light signal.
503, processing unit controls the working condition of laser cell according to the second optical signal, and working condition includes OTDR state
With distant pump state.
Specifically, when laser cell is in OTDR state, processing unit is sentenced according to the reflection/scattered light signal received
It is disconnected whether the working condition of laser cell to be switched to distant pump state；When laser cell is in distant pump state, processing unit root
Judge whether the working condition of laser cell being switched to OTDR state according to the reflected light signal received.
In the embodiment of the present invention, OTDR and distant pumping function are realized by same laser cell, are not only saved high
OTDR equipment cost solves the problems, such as that engineering staff's on-site test is time-consuming and laborious, additionally it is possible to realize real-time optical fiber cable path loss
Consumption monitoring is avoided due to the unclean existing danger for burning fiber end face of fiber end face.
Based on any of the above-described embodiment, a kind of distant pump pumping operated control method with OTDR function, step 501 is specifically wrapped
It includes：When laser cell is in OTDR state, the first optical signal is OTDR pulse signal；Processing unit is based on default OTDR rule
It controls a corresponding laser in laser cell and issues OTDR pulse signal；When laser cell is in distant pump state, first
Optical signal is pump light signals；Processing unit is based on corresponding one or more laser in default pumping rule control laser cell
Device issues pump light signals.
Specifically, laser cell includes several lasers, and the quantity of laser according to concrete application scene and can answer
It is adjusted with demand, the quantity to laser in laser cell and specification do not make specific limit to the embodiment of the present invention.It needs
Optical signal bright, that OTDR pulse signal is only issued by a laser, and pump light signals then can be and be swashed by several
Light device carries out the optical signal of multiplex after issuing.
Herein, OTDR rule is preset to be used to set in laser cell for emitting the laser of OTDR pulse signal, moreover it is possible to
It is enough in the impulse amplitude of setting transmitting OTDR pulse signal.In addition, default OTDR rule can also be used to setting transmitting OTDR
The pulse width of pulse signal and sampling number etc., the present invention is not especially limit this.Pump is issued under distant pump state
The number of lasers of Pu optical signal can be determined according to practical application scene and application demand, and the light letter that each laser issues
Number wavelength and power require to determine based on default pumping rule.
Based on any of the above-described embodiment, a kind of distant pump pumping operated control method with OTDR function, step 503 is specifically wrapped
It includes：When laser cell is in OTDR state, the second optical signal is Fresnel reflection or reflection/scattering light that Rayleigh scattering generates
Signal；Size of the processing unit based on OTDR pulse signal, when issuing time and reflection/scattered light signal size and reception
Between, obtain the OTDR testing result for the testing fiber link connecting with output optical fibre；If OTDR testing result meets default turn on pump
Condition, then processing unit control laser cell switches to distant pump state.
Herein, Fresnel reflection originates from the mutation of refractive index, therefore anti-based on the received reflection signal of Fresnel reflection
Catastrophe of optical fiber, such as fibercuts, mechanical connection etc. are saved.Rayleigh scattering refers to that OTDR pulse signal passes in a fiber
Defeated, due to the scattering signatures of optical fiber itself, very weak backscatter signal can be back to circulator.It is received based on Rayleigh scattering
The power of scattered signal reflects the attenuation characteristic of optical fiber.
The OTDR testing result for the testing fiber link connecting with output optical fibre can be the length including testing fiber link
Degree, loss, decaying and fault location etc., the present invention is not especially limit this.After obtaining OTDR testing result, sentence
Whether disconnected OTDR testing result meets default turn on pump condition, if OTDR testing result meets default turn on pump condition, processing unit
Control laser cell switches to distant pump state.
Herein, presetting turn on pump condition can be the area that testing fiber link is in corresponding testing result when normal condition
Between, if OTDR testing result is in when normal condition in corresponding testing result section, then it is assumed that OTDR testing result meets
Default turn on pump condition.Alternatively, default turn on pump condition is the threshold value of parameters in testing result, parameters threshold value can be passed through
Judge whether OTDR testing result meets default turn on pump condition.
Based on any of the above-described embodiment, a kind of distant pump pumping operated control method with OTDR function, step 503 is also wrapped
It includes：When laser cell is in distant pump state, the second optical signal is reflected light signal；If reflected light signal is greater than default reflection threshold
Value, then processing unit control laser cell switches to OTDR state.
Specifically, if reflected light signal is greater than default reflex threshold, confirm the optical fiber chain currently connecting with output optical fibre
There are failures on road, control laser cell through the processing unit and switch to OTDR state, to the optical fiber currently connecting with output optical fibre
Link carries out fault detection.
If reflected light signal is less than or equal to default reflex threshold, the optical fiber link shape currently connecting with output optical fibre is confirmed
State is normal, and processing unit control laser cell is maintained at distant pump state.
Finally it should be noted that：The above various embodiments is only to illustrate the technical solution of the embodiment of the present invention, rather than right
It is limited；Although the embodiment of the present invention is described in detail referring to foregoing embodiments, the ordinary skill of this field
Personnel should understand that：It is still possible to modify the technical solutions described in the foregoing embodiments, or to part
Or all technical features are equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution
The range of each embodiment technical solution of the embodiment of the present invention.
Claims (10)
1. a kind of distant pump with OTDR function pumps source device, which is characterized in that single including laser cell, circulator and processing
Member；
Wherein, the laser cell is connect with the circulator and the processing unit respectively；
The circulator is used for the first optical signal transmission for issuing the laser cell to output optical fibre, and by the output light
The second optical signal transmission that fibre returns is to the processing unit；
The processing unit is used to control the working condition of the laser cell, the working condition according to second optical signal
Including OTDR state and distant pump state.
2. the apparatus according to claim 1, which is characterized in that the laser cell includes several lasers；
When the laser cell is in the OTDR state, first optical signal is OTDR pulse signal；The processing is single
Member issues the OTDR pulse signal based on a laser corresponding in laser cell described in default OTDR rule control；
When the laser cell is in the distant pump state, first optical signal is pump light signals；The processing unit
The pump light letter is issued based on one or more corresponding in laser cell described in the default pumping rule control laser
Number.
3. the apparatus of claim 2, which is characterized in that the laser cell further includes several polarization multiplexers
And/or several wavelength division multiplexers；
The polarization multiplexer is used to carry out multiplex, the wavelength division multiplexer to the pump light signals that multiple lasers issue
For carrying out multiplex to the different pump light signals of wavelength.
4. the apparatus of claim 2, which is characterized in that
When the laser cell is in the OTDR state, second optical signal is that Fresnel reflection or Rayleigh scattering generate
Reflection/scattered light signal；
Size of the processing unit based on the OTDR pulse signal issues the big of time and the reflection/scattered light signal
Small and receiving time obtains the OTDR testing result for the testing fiber link connecting with the output optical fibre；
If the OTDR testing result meets default turn on pump condition, the processing unit controls the laser cell and switches to institute
State distant pump state.
5. the apparatus of claim 2, which is characterized in that
When the laser cell is in the distant pump state, second optical signal is reflected light signal；
If the reflected light signal is greater than default reflex threshold, the processing unit control laser cell switches to described
OTDR state.
6. the apparatus according to claim 1, which is characterized in that the processing unit includes photodetector；
The photodetector is used to second optical signal being converted to electric signal.
7. the apparatus of claim 2, which is characterized in that when the laser cell is in the distant pump state, institute
Stating the first optical signal is the pump light signals comprising at least one wavelength.
8. a kind of distant pump with OTDR function pumps operated control method, which is characterized in that including：
Control laser cell is transmitted to output optical fibre after issuing the first optical signal to circulator；
Receive the second optical signal that the output optical fibre of the circulator transmission returns；
Control the working condition of the laser cell according to second optical signal, the working condition includes OTDR state and distant
Pump state.
9. according to the method described in claim 8, it is characterized in that, the laser cell includes several lasers；
Accordingly, the control laser cell is transmitted to output optical fibre after issuing the first optical signal to circulator, specifically includes：
When the laser cell is in the OTDR state, first optical signal is OTDR pulse signal；Based on default
After a corresponding laser issues the OTDR pulse signal to circulator in laser cell described in OTDR rule control
It is transmitted to output optical fibre；
When the laser cell is in the distant pump state, first optical signal is pump light signals；Based on default pumping
After the corresponding one or more laser issues the pump light signals to circulator in laser cell described in rule control
It is transmitted to output optical fibre.
10. according to the method described in claim 9, it is characterized in that, described control the laser according to second optical signal
The working condition of unit, specifically includes：
When the laser cell is in the OTDR state, second optical signal is that Fresnel reflection or Rayleigh scattering generate
Reflection/scattered light signal；Size, sending time and the reflection/scattered light signal based on the OTDR pulse signal
Size and receiving time obtain the OTDR testing result for the testing fiber link connecting with the output optical fibre；If the OTDR
Testing result meets default turn on pump condition, then controls the laser cell and switch to the distant pump state；
When the laser cell is in the distant pump state, second optical signal is reflected light signal；If the reflected light
Signal is greater than default reflex threshold, then controls the laser cell and switch to the OTDR state.
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| CN113285751A (en) * | 2021-03-24 | 2021-08-20 | 国网江苏省电力有限公司徐州供电分公司 | Optical fiber communication system and optical fiber line switching protection method |
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