CN107123923A - Optical fiber laser, the guard method of optical fiber laser and storage medium - Google Patents
Optical fiber laser, the guard method of optical fiber laser and storage medium Download PDFInfo
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- CN107123923A CN107123923A CN201710385848.4A CN201710385848A CN107123923A CN 107123923 A CN107123923 A CN 107123923A CN 201710385848 A CN201710385848 A CN 201710385848A CN 107123923 A CN107123923 A CN 107123923A
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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
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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
- H01S3/094042—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a fibre laser
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Abstract
The embodiment of the invention discloses optical fiber laser, the guard method of optical fiber laser and storage medium, it is related to field of laser device technology.The optical fiber laser includes：Light path system, drive circuit and control circuit.Wherein, one or more pumping source and at least one output end cap are provided with the light path of the light path system；At one in the light path of the light path system or many places are provided with warning module；The warning module includes：One or more optical signal detection circuit, one or more control unit；One or more of control units be used for one in the light path at or many places without optical signal and one or more of pumping sources output pumping laser when, to the drive circuit send pre-warning signal.Technical scheme disclosed in the embodiment of the present invention cuts off one or more pumping source output pumping laser in time when can have at one or many places optical fiber to burn in the light path of optical fiber laser, it is to avoid optical fiber laser is badly damaged.
Description
Technical field
Technical scheme disclosed in the embodiment of the present invention is related to field of laser device technology, more particularly to optical fiber laser, optical fiber
The guard method of laser and storage medium.
Background technology
At present, the power of optical fiber laser is increasing, and beam quality is also significantly improved, in military, medical treatment, industry manufacture
Had a wide range of applications Deng field.
The construction of optical fiber laser generally comprises pumping source, gain media, resonator.The power density of optical fiber laser is all
It is very big, if the optical fiber in optical fiber laser has that light leak is serious, it is not good to solidify, radiating, it is easily caused
Optical fiber burns.
Inventor has found during the present invention is studied, optical fiber laser of the prior art have in the optical path at one or
When person many places optical fiber burns, if one or more pumping source light extraction can not be cut off in time, optical fiber laser will be caused serious
Damage.
The content of the invention
Technical scheme disclosed by the invention at least can solve the problem that following technical problem：Optical fiber laser has at one in the optical path
Or many places optical fiber is when burning, if one or more pumping source light extraction can not be cut off in time, optical fiber laser will be caused tight
The problem of damaging again.
One or more embodiment of the present invention discloses a kind of optical fiber laser, including light path system, drive circuit
And control circuit, wherein being provided with one or more pumping source and at least one output in the light path of the light path system
Hold cap.At one in the light path of the light path system or many places are provided with warning module.The warning module includes：One or
Multiple optical signal detection circuits, one or more control unit.The control circuit is produced for controlling one or more
Pumping source exports the pulse-width signal of pumping laser, and the pulse-width signal is sent into one or more of controls
Unit processed.The optical signal detection circuit is used for the optical signal for detecting at one in the light path or many places；It is one or
Multiple control units are used at one in the light path or many places without optical signal and the output of one or more of pumping sources
During pumping laser, pre-warning signal is sent to the drive circuit；The pre-warning signal is used to control one or more of pumps
Pu source cut-out output pumping laser.
In one or more embodiment of the present invention, described control unit is provided with for adding up the pulsewidth modulation
The timer of the high level lasting time of signal.Described control unit is in rising edge in the pulse-width signal or is in
During high level, the timer is controlled to add up the high level lasting time of the pulse-width signal.
In one or more embodiment of the present invention, high level of the described control unit in the pulse-width signal
When duration is not more than the first preset time, the high level for controlling the timer to stop adding up the pulse-width signal is held
The continuous time.
In one or more embodiment of the present invention, high level of the described control unit in the pulse-width signal
Duration is more than the first preset time, and gets in the second preset time at one in the light path or many for characterizing
When there is the high level of optical signal at place, the timer is controlled to stop adding up the high level lasting time of the pulse-width signal.
In one or more embodiment of the present invention, high level of the described control unit in the pulse-width signal
Duration is more than the first preset time, and do not get in the second preset time for characterizing at one in the light path or
When there is the high level of optical signal person many places, the pre-warning signal is sent to the drive circuit.
The present invention one or more embodiment in, one in the light path of the light path system at or many places be provided with
Mode stripper.The warning module is arranged in the light path between the mode stripper and the output end cap.
One or more embodiment of the present invention also discloses a kind of guard method of optical fiber laser, including：
Obtain the pulse-width signal for controlling one or more pumping source to export pumping laser；
When the pulse-width signal is in rising edge or in high level, add up the height of the pulse-width signal
Level duration；
When the high level lasting time of the pulse-width signal is more than the first preset time, and in the second preset time
Do not get when having the high level of optical signal for characterizing at one in light path or many places, send pre-warning signal；
The pre-warning signal is used to control one or more of pumping source cut-out output pumping lasers.
In one or more embodiment of the present invention, when the pulse-width signal had not only been not at rising edge but also do not locate
When high level, continue to obtain the pulse-width signal for being used to control one or more pumping source to export pumping laser.
In one or more embodiment of the present invention, when the high level lasting time of the pulse-width signal is little
When first preset time, stop adding up the high level lasting time of the pulse-width signal, continuing to obtain is used to control
Make the pulse-width signal that one or more pumping source exports pumping laser.
In one or more embodiment of the present invention, when the high level lasting time of the pulse-width signal is more than
First preset time, and get in second preset time and to have light letter for characterizing at one in light path or many places
Number high level when, stop add up the pulse-width signal high level lasting time, continue obtain be used for control one or
The multiple pumping sources of person export the pulse-width signal of pumping laser.
One or more embodiment of the present invention also discloses a kind of non-transient computer readable storage medium storing program for executing, described non-
Be stored with computer instruction in transitory computer readable storage medium, and the computer instruction is loaded suitable for processor, to realize
The guard method of any one above-mentioned optical fiber laser.
Compared with prior art, technical scheme disclosed by the invention mainly has following beneficial effect：
In an embodiment of the present invention, the optical fiber laser one in the light path of its light path system at or many places set
Have a warning module, thus the optical fiber laser can be detected by the warning module in the light path of the light path system whether
There is optical signal.The optical fiber laser is also used for control one by what is produced in the warning module analysis control circuit
Or multiple pumping sources export the pulse-width signal of pumping laser, judgement show whether one or more of pumping sources are defeated
Go out pumping laser.There is no light in one or more of pumping sources output pumping laser, and the light path of the light path system
During signal, the warning module sends the pre-warning signal to the drive circuit.The drive circuit gets the early warning
During signal, one or more of pumping source output pumping lasers are cut off immediately.In summary, the optical fiber in above-described embodiment
When laser can have at one in the optical path or many places optical fiber burns, the output pumping of one or more pumping source is cut off in time
Laser, it is to avoid optical fiber laser is badly damaged.
Brief description of the drawings
Fig. 1 is the schematic diagram of optical fiber laser in one embodiment of the invention；
Fig. 2 is the schematic diagram of light path system in another embodiment of the present invention；
Fig. 3 is the schematic diagram of optical signal detection circuit in one embodiment of the invention；
Fig. 4 is the schematic diagram of the guard method of optical fiber laser in one embodiment of the invention；
Fig. 5 is the flow chart of the guard method of optical fiber laser in another embodiment of the present invention.
Embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give presently preferred embodiments of the present invention.But, the present invention can be realized in many different forms, however it is not limited to this paper institutes
The embodiment of description.On the contrary, the purpose for providing these embodiments is to make the understanding to the disclosure more thorough
Comprehensively.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Following claims, specification and Figure of description
In term " first ", " second " etc. be to be used to distinguish different objects, rather than for describing particular order.
One embodiment of the invention discloses a kind of optical fiber laser, and claimed technical scheme is illustrated.Specifically
The optical fiber laser being related in embodiment is preferred embodiment, and all possible embodiment of non-invention or most
Good embodiment.
It is the schematic diagram of optical fiber laser in one embodiment of the invention with reference to Fig. 1.The optical fiber laser illustrated in Fig. 1
Including：Control circuit 100, drive circuit 200 and light path system 300.The drive circuit 200 connects institute in the form of circuit
State control circuit 100 and the light path system 300.
One or more pumping source 31 and at least one output end cap are provided with the light path of the light path system 300
32.At one in the light path of the light path system 300 or many places are provided with warning module 33.Those skilled in the art can be
The light path system 300 increases some parts, so that the light path system 300 is realized laser concussion output or realized most
Good laser concussion output.
The warning module 33 includes：One or more optical signal detection circuit 331, one or more control unit
332。
The control circuit 100 produces the pulsewidth modulation for controlling one or more pumping source 31 to export pumping laser
Signal, and the pulse-width signal is sent to one or more of control units 332.
The optical signal detection circuit 331 is used for the optical signal for detecting at one in the light path or many places.It is one
Or multiple control units 332 are used at one in the light path or many places without optical signal and one or more of pumpings
When source 31 exports pumping laser, pre-warning signal is sent to the drive circuit 200.The pre-warning signal is one for controlling
Or the multiple cut-out of pumping source 31 output pumping lasers.
Described control unit 332 is provided with the timer of the high level lasting time for adding up the pulse-width signal
(not shown).Described control unit 332 is when the pulse-width signal is in rising edge or in high level, and control is described
Timer adds up the high level lasting time of the pulse-width signal.
Described control unit 332 judges the pulsewidth modulation according to the high level lasting time of the pulse-width signal
Whether signal is useful signal.Described control unit 332 judges whether the pulse-width signal is that useful signal includes：Work as institute
The high level lasting time for stating pulse-width signal is more than the first preset time, and the pulse-width signal is useful signal, no
It is then interference signal.
Described control unit 332 is determined whether one in the light path when the pulse-width signal is useful signal
Place or many places whether there is optical signal.
Described control unit 332 one in the pulse-width signal is useful signal and the light path at or many places without
During optical signal, the pre-warning signal is sent to the drive circuit 200.
In one or more preferably embodiments, height electricity of the described control unit 332 in the pulse-width signal
When the flat duration is not more than the first preset time (namely the pulse-width signal is interference signal), the timer is controlled
Stop adding up the high level lasting time of the pulse-width signal.
In one or more preferably embodiments, height electricity of the described control unit 332 in the pulse-width signal
The flat duration is more than the first preset time (namely the pulse-width signal is useful signal), and in the second preset time
Get when having the high level of optical signal for characterizing at one in the light path or many places, control the timer to stop accumulative
The high level lasting time of the pulse-width signal.
In one or more preferably embodiments, height electricity of the described control unit 332 in the pulse-width signal
The flat duration is more than the first preset time, and is not got in the second preset time for characterizing at one in the light path
Or many places are when having the high level of optical signal, the pre-warning signal is sent to the drive circuit 200.
The control circuit 100, drive circuit 200 and light path that the optical fiber laser is described as including illustrating in Fig. 1
System 300, only to facilitate explanation technical scheme, remaining can substantially be described as including above three part
Optical fiber laser should be considered as equivalent technical scheme.
Optical fiber laser in above-described embodiment one in the light path of its light path system 300 at or many places be provided with early warning
Module 33, thus the optical fiber laser can be detected in the light path of the light path system 300 by the warning module 33 and be
It is no to have optical signal.The optical fiber laser also by the warning module 33 analyze it is described control circuit 100 in produce be used for
One or more pumping source 31 is controlled to export the pulse-width signal of pumping laser, judgement draws one or more of pumps
Whether Pu source 31 exports pumping laser.Pumping laser, and the light path system are exported in one or more of pumping sources 31
When not having optical signal in 300 light path, the warning module 33 sends the pre-warning signal to the drive circuit 200.It is described
When drive circuit 200 gets the pre-warning signal, the one or more of output of pumping source 31 pumping lasers are cut off immediately.
In summary, the optical fiber laser in above-described embodiment can in the optical path have at one or cut off in time when many places optical fiber burns
One or more pumping source exports pumping laser, it is to avoid optical fiber laser is badly damaged.
It is the schematic diagram of light path system in another embodiment of the present invention with reference to Fig. 2.The light path system illustrated in Fig. 2 is only
It is in order to further explain the light path system 300 illustrated in Fig. 1, to be not intended to limit protection scope of the present invention.
It is disposed with the light path for the light path system illustrated in Fig. 2：Forward direction optical pumping source 301, forward light bundling device
302nd, high reflective fiber grating 303, the first gain media 304, low reflective fiber grating 305, backward combiner device 306, backward
Optical pumping source 307, amplification pumping source 308, amplification pumping combiner device 309, the second gain media 310, mode stripper 311, early warning
Module 312 and output end cap 313.Wherein described warning module 312 is arranged on the mode stripper 311 and the output end cap
In light path between 313.
In addition to the mode stripper 311, more mode strippers can also be set in the light path of the light path system.For example,
Mode stripper is set in light path between the low reflective fiber grating 305 and the backward combiner device 306.
The warning module 312 can be specifically located in the forward direction light path of the light path system.For example, when described low anti-
When being provided with mode stripper in the light path between light fiber grating 305 and the backward combiner device 306, the warning module 312
It can be arranged in the light path between the mode stripper and the backward combiner device 306.
It is the schematic diagram of optical signal detection circuit 331 in one embodiment of the invention with reference to Fig. 3.The circuit illustrated in Fig. 3
Construction, simply described 331 1 preferred embodiments of optical signal detection circuit, are not intended to limit protection scope of the present invention.
The optical signal detection circuit 331 illustrated in Fig. 3 includes a photodiode (PD, Photo-Diode), and the photodiode will
Optical signal is converted into electric signal.The optical signal detection circuit 331 illustrated in Fig. 3 detects optical signal in the photodiode
When, provide high level to described control unit 332.Those skilled in the art is it is to be appreciated that the circuit structure illustrated in Fig. 3
It can apply to the warning module 312 illustrated in Fig. 2.
Light path system in above-described embodiment, after being arranged on the mode stripper by the warning module 312 and be described
Into the light path between combiner device 306.Thus the warning module 312 can detect the light path of the light path system in time
In whether have optical signal, but not interfere with the normal light extraction of the light path system.
With reference to the optical fiber laser in above-described embodiment, one embodiment of the invention discloses a kind of protection of optical fiber laser
Method.
It is the schematic diagram of the guard method of optical fiber laser in one embodiment of the invention with reference to Fig. 4.Illustrate in Fig. 4
The guard method of optical fiber laser includes：
Step 1：Obtain the pulse-width signal for controlling one or more pumping source to export pumping laser.
It is described to be used to control one or more pumping source to export pumping by taking the optical fiber laser in above-described embodiment as an example
The pulse-width signal of laser comes from the control circuit 100 illustrated in Fig. 1.Those skilled in the art is it is to be appreciated that above-mentioned
Pulse-width signal is not the unique selection for controlling one or more pumping source to export pumping laser.Do not paying significantly
On the premise of creative work, the pulse-width signal described in the embodiment of the present invention is substituted using other types of electric signal,
The equivalent technical scheme of the embodiment of the present invention should be considered as.
Step 2：When the pulse-width signal is in rising edge or in high level, add up the pulsewidth modulation letter
Number high level lasting time.
Step 3：When the high level lasting time of the pulse-width signal is preset more than the first preset time, and second
Do not got in time when having the high level of optical signal for characterizing at one in light path or many places, send pre-warning signal.
It is described to characterize at one or many places in light path and have the height of optical signal by taking the optical fiber laser in above-described embodiment as an example
The optical signal detection circuit 331 that level is illustrated in Fig. 1 or Fig. 3 certainly.Those skilled in the art is it is to be appreciated that electric with the height
At one in flat sign light path or many places have optical signal to be not unique selection.Before notable creative work is not paid
Put, at one in sign light path described in the embodiment of the present invention or many places are substituted using other types of electric signal optical signal
High level, the equivalent technical scheme of the embodiment of the present invention should be considered as.The pre-warning signal is generally electric signal, for controlling
Make one or more of pumping source cut-out output pumping lasers.
In one or more preferably embodiments, the guard method of the optical fiber laser also includes：When the arteries and veins
When wide modulated signal had not only been not at rising edge but also had been not at high level, continuing to obtain is used to control one or more pumping source defeated
Go out the pulse-width signal of pumping laser, then re-execute the step 2 and step 3.
In one or more preferably embodiments, the guard method of the optical fiber laser also includes：When the arteries and veins
When the high level lasting time of wide modulated signal is not more than first preset time, stop adding up the pulse-width signal
High level lasting time, continues to obtain the pulse-width signal for being used to control one or more pumping source to export pumping laser,
Then the step 2 and step 3 are re-executed.
In one or more preferably embodiments, the guard method of the optical fiber laser also includes：When the arteries and veins
The high level lasting time of wide modulated signal is more than the first preset time, and is got in the second preset time for characterizing light
When there is the high level of optical signal at Lu Zhongyi or many places, stop adding up the high level lasting time of the pulse-width signal
(can be regarded as terminating an early warning cycle), continues to obtain the arteries and veins for being used to control one or more pumping source to export pumping laser
Wide modulated signal, then re-executes the step 2 and step 3.
Specifically, second preset time is more than first preset time.It is used as implementation technical solution of the present invention
With reference to first preset time is generally 15-25 microseconds, is specifically as follows 20 microseconds, and second preset time is generally
1.5-2.5 millisecond, is specifically as follows 2 milliseconds.Typically, when second preset time should be default more than described first
Between.It typically can repeatedly judge whether to get in second preset time and have light for characterizing at one in light path or many places
The high level of signal.
The guard method of optical fiber laser in above-described embodiment, is first determined whether described for controlling one or more pump
Whether the pulse-width signal of Pu source output pumping laser is in rising edge or in high level.When the pulse-width signal
During in rising edge or in high level, add up the high level lasting time of the pulse-width signal.When the pulsewidth is adjusted
The high level lasting time of signal processed is more than the first preset time, and is not got in the second preset time for characterizing light
When there is the high level of optical signal at Lu Zhongyi or many places, pre-warning signal is sent.Thus, the optical fiber laser implements the light
During the guard method of fibre laser, the big repacking without making, it becomes possible to accurately and timely do not have optical signal in the light path
When cut off one or more pumping source output pumping laser.
The guard method of the optical fiber laser in above-described embodiment is further illustrated below in conjunction with Fig. 5.
It is the flow chart of the guard method of optical fiber laser in another embodiment of the present invention with reference to Fig. 5.Illustrate in Fig. 5
The flow of guard method of optical fiber laser include but is not limited to herein below：
For the ease of complete and clearly state the guard method of the optical fiber laser, the step of will be to illustrate in Fig. 5
A1 is initial step.
Step a1 includes but is not limited to：Obtain and adjusted for the pulsewidth for controlling one or more pumping source to export pumping laser
Signal processed.
The pulse-width signal got is judged, including step b1.Judge to draw the pulsewidth by step b1
Whether modulated signal is in rising edge.When the pulse-width signal is not on rising edge, step b2 is further performed.It is logical
Step b2 is crossed to judge to show whether the pulse-width signal is in high level.It should be noted is that, the step illustrated in Fig. 5
Rapid b1 and step b2 has the order of priority, but step b1 and step b2 can be performed side by side.When the pulse-width signal
Step c1 is performed during in rising edge or in high level, step d1 is then performed.
Step c1 includes but is not limited to：Add up the high level lasting time of the pulse-width signal.
When judging whether the high level lasting time for drawing the pulse-width signal is default more than first by step d1
Between.
Step e1 is performed when the high level lasting time of the pulse-width signal is not more than first preset time,
Then return to step a1.Step e1 includes but is not limited to：Stop adding up the high level lasting time of the pulse-width signal.
Step f1 is performed when the high level lasting time of the pulse-width signal is more than first preset time.It is logical
Cross step f1 and judge to draw whether to get have optical signal for characterizing at one in light path or many places in the second preset time
High level.It should be noted is that, the step f1 illustrated in Fig. 5 can be decomposed into two steps, i.e., it is first determined whether
Get has the high level of optical signal for characterizing at one in light path or many places, then judges whether when described second is default
In.In this case, it will judge whether to get for characterizing one in light path repeatedly in second preset time
There is the high level of optical signal place or many places.
There is the height electricity of optical signal for characterizing at one in light path or many places when not got in the second preset time
Usually perform step g1.Step g1 includes but is not limited to：Send pre-warning signal.Got when in the second preset time for table
Levy at one in light path or many places and perform step e1 when having the high level of optical signal, then return to step a1.
Those skilled in the art is it is to be appreciated that in actual application, each above-mentioned step would be possible to be held repeatedly
OK, it is also possible to which the thought of the guard method based on above-mentioned optical fiber laser is performed with other Process flows.Simply simply change
Variable flow form, should be considered as the equivalent technical scheme of the embodiment of the present invention.
One embodiment of the invention discloses a kind of non-transient computer readable storage medium storing program for executing, and the non-transient computer is readable
Be stored with computer instruction in storage medium, and the computer instruction is loaded suitable for processor, to realize any one above-mentioned light
The guard method of fibre laser.The non-transient computer readable storage medium storing program for executing is applied in the control unit illustrated in Fig. 1
332.And 332 can be the single-chip microcomputer for meeting technical requirements in described control unit, it can also be that by and the control
The other kinds of computer of 332 identical control functions in unit.
When the technical scheme in each above-mentioned embodiment uses software to realize, each above-mentioned embodiment can will be realized
Computer instruction and/or data storage in computer-readable medium or as one or more instructions on computer-readable recording medium or
Code is transmitted.Computer-readable medium includes computer-readable storage medium and communication media, and wherein communication media includes being easy to
Any medium of computer program is transmitted from a place to another place.Storage medium can be that computer can be stored
Any usable medium.As example but not limited to this：Computer-readable medium can include RAM, ROM, EEPROM, CD-ROM or
Other optical disc storages, magnetic disk storage medium or other magnetic storage apparatus or can carry or store with instruction or data
The desired program code of structure type and can by computer access any other medium.In addition, any connection can be fitted
When turn into computer-readable medium.If for example, software is to use coaxial cable, light pricker optical cable, twisted-pair feeder, Digital Subscriber Line
(DSL) or such as wireless technology of infrared ray, radio and microwave etc from website, server or other remote sources transmit
, then the wireless technology bag of coaxial cable, light pricker optical cable, twisted-pair feeder, DSL or such as infrared ray, wireless and microwave etc
Include in the definition of affiliated medium.
Finally it should be noted that：Above example is only to the technical scheme for illustrating the application, rather than its limitations.Although
The application is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that, it still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic.
And these modification or replace, do not make appropriate technical solution essence depart from each embodiment technical scheme of the application spirit and
Scope.
Claims (11)
1. a kind of optical fiber laser, including light path system, drive circuit and control circuit, wherein the light path of the light path system
In be provided with one or more pumping source and at least one output end cap, it is characterised in that：
At one in the light path of the light path system or many places are provided with warning module；
The warning module includes：One or more optical signal detection circuit, one or more control unit；
The control circuit produces the pulse-width signal for controlling one or more pumping source to export pumping laser, and will
The pulse-width signal is sent to one or more of control units；
The optical signal detection circuit is used for the optical signal for detecting at one in the light path or many places；It is one or more of
Control unit is used at one in the light path or many places without optical signal and the output pumping of one or more of pumping sources
During laser, pre-warning signal is sent to the drive circuit；The pre-warning signal is used to control one or more of pumping sources
Cut-out output pumping laser.
2. optical fiber laser according to claim 1, it is characterised in that described control unit is provided with for accumulative described
The timer of the high level lasting time of pulse-width signal；
Described control unit controls the timer to tire out when the pulse-width signal is in rising edge or in high level
Count the high level lasting time of the pulse-width signal.
3. optical fiber laser according to claim 2, it is characterised in that described control unit is in the pulse-width signal
High level lasting time when being not more than the first preset time, control the timer to stop adding up the pulse-width signal
High level lasting time.
4. optical fiber laser according to claim 2, it is characterised in that described control unit is in the pulse-width signal
High level lasting time be more than the first preset time, and get in the second preset time for controlling one or more
During the high level of the pulse-width signal of pumping source output pumping laser, the timer is controlled to stop adding up the pulsewidth modulation
The high level lasting time of signal.
5. optical fiber laser according to claim 2, it is characterised in that described control unit is in the pulse-width signal
High level lasting time be more than the first preset time, and do not get in the second preset time for characterizing the light path
In at one or many places when having the high level of optical signal, send the pre-warning signal to the drive circuit.
6. the optical fiber laser according to claim 1-5 any one, it is characterised in that in the light path of the light path system
At one or many places are provided with mode stripper；
The warning module is arranged in the light path between the mode stripper and the output end cap.
7. a kind of guard method of optical fiber laser, it is characterised in that including：
Obtain the pulse-width signal for controlling one or more pumping source to export pumping laser；
When the pulse-width signal is in rising edge or in high level, add up the high level of the pulse-width signal
Duration；
When the high level lasting time of the pulse-width signal is more than the first preset time, and do not have in the second preset time
Get when having the high level of optical signal for characterizing at one in light path or many places, send pre-warning signal；
The pre-warning signal is used to control one or more of pumping source cut-out output pumping lasers.
8. the guard method of optical fiber laser according to claim 7, it is characterised in that when the pulse-width signal both
When being not at rising edge and being not at high level again, continuing to obtain is used to control one or more pumping source to export pumping laser
Pulse-width signal.
9. the guard method of optical fiber laser according to claim 7, it is characterised in that when the pulse-width signal
When high level lasting time is not more than the first preset time, stop adding up the high level lasting time of the pulse-width signal,
Continue to obtain the pulse-width signal for being used to control one or more pumping source to export pumping laser.
10. the guard method of optical fiber laser according to claim 7, it is characterised in that when the pulse-width signal
High level lasting time be more than the first preset time, and get in the second preset time for characterizing at one in light path or
When there is the high level of optical signal person many places, stop adding up the high level lasting time of the pulse-width signal, continue to obtain and use
In the pulse-width signal for controlling one or more pumping source to export pumping laser.
11. a kind of non-transient computer readable storage medium storing program for executing, it is characterised in that in the non-transient computer readable storage medium storing program for executing
Be stored with computer instruction, and the computer instruction is loaded suitable for processor, to realize described in claim 7 to 10 any one
Optical fiber laser guard method.
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Cited By (1)
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| CN110635341A (en) * | 2019-09-19 | 2019-12-31 | 苏州创鑫激光科技有限公司 | Optical fiber laser protection method and optical fiber laser |
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