CN106159655A - A kind of optical fiber laser - Google Patents
A kind of optical fiber laser Download PDFInfo
- Publication number
- CN106159655A CN106159655A CN201610686551.7A CN201610686551A CN106159655A CN 106159655 A CN106159655 A CN 106159655A CN 201610686551 A CN201610686551 A CN 201610686551A CN 106159655 A CN106159655 A CN 106159655A
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- Prior art keywords
- laser
- optical fiber
- resonance
- source
- mode stripper
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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
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06716—Fibre compositions or doping with active elements
-
- 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
- H01S3/0675—Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] fibre lasers
-
- 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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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
The present invention is applicable to laser field, it is provided that a kind of optical fiber laser, including resonance source, a stage power amplifier, and the first mode stripper being located between resonance source and a stage power amplifier；Resonance source includes successively: resonance pumping source, resonance pump signal bundling device, high anti-fiber grating, the first gain media and low anti-fiber grating；One stage power amplifier includes successively: amplifies pumping source, amplify pump signal bundling device, the second gain media, the second mode stripper and collimator.Produce seed laser by resonance source, the high power laser light more than 2KW can be obtained through a stage power amplifier；The pump light of residual can be filtered by the first mode stripper, the second mode stripper in time, improves stability and the accuracy of Laser Transmission, reduces probability nonlinear effect occur；The optical device arrangement of optical fiber laser is more reasonable simultaneously, and technique is more stable, reliable, and multiple detectors reduce resonance pumping source, amplify pumping source and the probability guiding electro-optical device to be broken.
Description
Technical field
The invention belongs to laser field, particularly relate to a kind of optical fiber laser.
Background technology
Optical fiber laser organically combines optical fiber technology together with Principles of Laser dexterously, has high efficiency, high beam
The advantage such as quality, compact conformation, is the high-strength light being positioned the industries such as machining, laser medicine, automobile making and military affairs
Source.The particularly high-capacity optical fiber laser of multikilowatt, can directly carry out Metal Cutting, weld, turn the industrial processes such as hole, and
By multiple stage multikilowatt full-optical-fiber laser is carried out power combing, it is easy to obtain the laser output of myriawatt level, thus meet
The demand of some special dimensions.Currently in order to obtain the output of high-power continuous laser, general employing single-stage resonance scheme, example
As, using the scheme of unidirectional pumping, it includes forward pumping or backward pumping, due to by the technologic restriction of bundling device, defeated
Go out power and only up to reach 1500W.To continue to improve output, typically having two ways, one is to use two directional pump
Mode, another kind be use master oscillation power amplification mode.
The backward pumping not fully absorbed by gain fibre is not done any process by patent CN201310138103.X, real
When border laser runs, this part pump light is easily by entering, break forward pumping source after forward bundling device and guiding light.With
Time, the passive fiber of the high power laser light output transmission obtained is longer, nonlinear effect, i.e. stimulated Raman scattering easily occurs.
In patent CN201310413877.9 by install in the middle of the gain fibre mode stripper prevent unabsorbed reversely
Pump light enters forward bundling device and pumping source, and this is the highest to the technological requirement of this mode stripper, if stripping mould is insufficient, and forward pump
Source, Pu and the probability guiding light to be broken are the highest.More do not inhale it addition, can remain than optical fiber connector in the middle of gain fibre
Receive pump light, so can reduce laser-conversion efficiency.
In sum, the laser instrument of existing acquisition high power laser light is the most harsh to technological requirement, and technique is the most unstable,
Nonlinear effect the most easily occurs, but also easily causes device failure.
Summary of the invention
The embodiment of the present invention provides a kind of laser instrument, it is intended to solve the laser process of existing acquisition high power laser light not
Stable, the flimsy problem of device.
The embodiment of the present invention is achieved in that a kind of optical fiber laser, including:
Produce the resonance source of seed laser, described seed laser is carried out a stage power amplifier of power amplification, and
It is located at the first mode stripper between described resonance source and a described stage power amplifier；
Described resonance source produces along laser and includes successively to the direction forming seed laser output: resonance pumping source, resonance
Pump signal bundling device, high anti-fiber grating, the first gain fibre, and low anti-fiber grating；
A described stage power amplifier includes successively along seed laser input to the direction amplifying output: amplification pumping source,
Amplify pump signal bundling device, the second gain fibre, the second mode stripper, collimator.
The invention provides a kind of optical fiber laser, including resonance source, a stage power amplifier, and be located at resonance source with
The first mode stripper between one stage power amplifier；Produce seed laser by resonance source, surpassed through a stage power amplifier
Cross the high power laser light of 2KW；The pump light of residual can be filtered by the first mode stripper, the second mode stripper in time, improves sharp
The stability of optical transport and accuracy, reduce probability nonlinear effect occur；The optical device arrangement of optical fiber laser simultaneously
More reasonable, technique is more stable, reliable, and multiple detectors reduce resonance pumping source, amplify pumping source and guide electro-optical device
The probability broken.
Accompanying drawing explanation
Fig. 1 is the device layout viewing of the optical fiber laser that the embodiment of the present invention provides.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right
The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, and
It is not used in the restriction present invention.
The optical fiber laser that the present invention provides, produces seed laser by resonance source, obtains through a stage power amplifier
High power laser light more than 2KW；In time the pump light of residual is filtered by the first mode stripper, the second mode stripper, improve
The stability of Laser Transmission and accuracy, reduce probability nonlinear effect occur；The optical device of optical fiber laser simultaneously
Arrangement is more reasonable, and technique is more stable, reliable, and multiple detectors reduce resonance pumping source, amplify pumping source and guide light
The probability that device is broken.
Below in conjunction with specific embodiment, the specific implementation of the present invention is elaborated.
As it is shown in figure 1, in one embodiment of the invention, a kind of optical fiber laser specifically includes that generation seed laser
Resonance source 1；Seed laser is carried out a stage power amplifier 2 of power amplification, and is located at resonance source 1 and puts with one-level power
The first mode stripper 3 between big device 2.
In detail, in figure, direction N represents the direction that laser exports, and resonance source 1 includes along the direction that laser exports successively:
Resonance pumping source 11, resonance pump signal bundling device 12, high anti-fiber grating the 13, first gain media 14, and low reflective fibre
Grating 15.The direction that one stage power amplifier 2 exports along laser includes successively: amplifies pumping source 21, amplify pump signal conjunction bundle
Device the 22, second gain media the 23, second mode stripper 24, and collimator 25.
In embodiments of the present invention, resonance source 1 inner laser power is less, and high power laser light transmission is concentrated mainly on one-level merit
In rate amplifier 2, the high power laser light obtained is directly output to optical fiber laser after the second mode stripper 24 and collimator 25
Outward, passive transmission fiber lengths is shorter, improves the threshold value of nonlinear effect.
In one embodiment of the invention, resonance pumping source 11 and amplify pumping source 21 all to comprise at least one tail optical fiber defeated
The semiconductor laser gone out, it is preferred that resonance pumping source 11 all comprises more than one semiconductor laser with amplifying pumping source 21,
Jointly acted on by multiple semiconductor lasers, promote the power of pumping source.Wherein, resonance pumping source 11 and amplification pumping source
The wavelength of 21 can be different, but multiple semiconductor lasers of composition resonance pumping source 11, and wavelength needs consistent, and quasiconductor swashs
The direction of light device is identical, is forward pumping, to prevent from interfering.In like manner, composition amplifies multiple optical fiber half of pumping source 21
Conductor, its wavelength is also required to unanimously, and the direction of semiconductor laser is identical, is forward pumping, to prevent from interfering.
In one embodiment of the invention, the operation wavelength of semiconductor laser is usually 915nm, 940nm or 976nm
In one, or multiple combination, the most according to the actual requirements, the wavelength of semiconductor laser can also is that other, selects more
Flexibly, here and be not construed as limiting.Wherein, the general power output more than resonance pumping source 11 of pumping source 21 is amplified, with reality
Existing power amplification function.
In one embodiment of the invention, resonance pump signal bundling device 12 is mainly used in resonance pumping source 11
Multichannel pumping combiner to one optical fiber exports, to improve pump power.Similarly, amplify pump signal bundling device 22 to be used for
Multichannel pumping combiner to one optical fiber that will amplify in pumping source 21 exports, to improve pump power.
In embodiments of the present invention, the reflectance of high anti-fiber grating pair flashlight is more than 99%, low anti-fiber grating pair
The reflectance of signal is less than 12%, and both constitutes the resonator cavity of laser instrument.
In one embodiment of the invention, the first gain media 14 and the second gain media 23 can be gain fibre.Excellent
Choosing, the first gain media 14 and the second gain media 23 are the non-circular optical fiber of double clad, and put with certain bending radius
Put in the V-groove on cold water plate.Further, the first gain media 14 and the second gain media 23 surface are covered with heat radiation Jie
Matter, to improve beam quality, and is beneficial to heat radiation；Such as, thermal paste is covered at outer surface.
In embodiments of the present invention, the first mode stripper 3 and the second mode stripper 24, for being absorbed into the light of fibre cladding, subtract
These the harmful lights little impact on laser propagation efficiency, it is to avoid interference Laser Transmission.Divest these harmful lights can produce greatly simultaneously
The heat of amount, therefore should configure corresponding radiating subassembly outside mode stripper.
In embodiments of the present invention, the first mode stripper 3 is located between resonance source 1 and a stage power amplifier 2, humorous to filter
Unabsorbed pump light in vibration source 1, prevents from disturbing follow-up amplification.If without the first mode stripper 3, then resonance source 1 not being inhaled
The pumping source received can enter in a stage power amplifier 2, the optical device being easily damaged in amplifier.
In a preferred embodiment of the invention, the first mode stripper 3 and the second mode stripper 24 are multi-segment structure, and it can
Unabsorbed pump light carries out grading absorption, and every section of mode stripper length is less, and heat dissipation region is more disperseed, so that pump light
Filter the most abundant.Illustrate with the second mode stripper 24 below.
Such as, laser, after the second gain media 23, can have more than the unabsorbed pump light of hectowatt, to once
Property fully filters these pump lights, and the mode stripper length of needs is the longest, even more than 1m, and this will increase laser structure greatly
Size.Therefore, making the second mode stripper 24 of multisection type after the second gain media 23, every section of mode stripper length is shorter,
Less than 15cm, each spacer segment is flexible, to facilitate placement stripping mould part to be as the criterion.
In one embodiment of the invention, optical fiber laser also includes the signal by resonance pump signal bundling device 12
The guide electro-optical device 41 of the main optical path of incoming end incoming fiber optic laser instrument.Wherein, the quasiconductor guiding electro-optical device 41 to be band tail optical fiber
Laser instrument, operation wavelength is at visible-range.Such as, the guide light of guidance device is generally the visible ray such as HONGGUANG or green glow, by
In guiding light and laser to have identical path, optical fiber laser guides electro-optical device i.e. to open after starting, by guiding light to light
Road is adjusted, or alignment laser machining site, makes the test of laser instrument, debugging and the course of processing more convenient.
In one embodiment of the invention, during laser spontaneous radiation, the laser in optical fiber is to launch to two ends
, owing to the reflectance of high anti-fiber grating 13 can not reach 100%, so having sub-fraction laser by high reflective fibre
Grating 13 and resonance pump signal bundling device 12 carry out reverse transfer.Therefore, also include can be right for the optical fiber laser in the present invention
The first detector 42 that in resonance source 1, the laser of reversely output is monitored.Wherein, between the first detector 42 and resonance source 1
It is additionally provided with wavelength division multiplexer 43, in order to be derived to detector 42 by the counterpropagation laser in resonance source 1.If detector 42 is visited
The counterpropagation laser power stability measured is in a particular range, then it represents that laser output is stable；If the reverse biography detected
Defeated laser power exceeds this particular range, then it represents that laser output abnormality.
In one embodiment of the invention, it is provided with the second detector between the first mode stripper 3 and a stage power amplifier 2
5.It is provided with the 3rd detector 6 between second mode stripper 24 and collimator 25.In detail, resonance source 1 can produce power be 200～
The seed source laser of 1000W, can obtain the high power laser light output more than 2KW after a stage power amplifier 2.Resonance source 1
Unlatching with the pumping source of a stage power amplifier 2 has timing requirements, i.e. one-level merit just can be opened after having laser output in resonance source 1
The amplification pumping source 21 of rate amplifier 2, with Backup lightpath, therefore in the present invention, arranges the second detection after the first mode stripper 3
Device 5, arranges the 3rd detector 6 after the second mode stripper 24, ensures light path by the second detector 5 and the 3rd detector 6
Safety.
Detailed, load certain driving electric current first to resonance pumping source 3, if the first mode stripper 3 and the second mode stripper
The second detector 5 and the 3rd detector 6 after 24 can detect laser, continue to increase the driving electric current of resonance pumping source 11 extremely
Preset value, normal then unlatching of laser output amplifies the driving electric current of pumping source 21 to preset value.When detector 17 or 18 does not detects
To laser, i.e. laser output abnormality, then should close power supply immediately, the most destroyed with the device protecting optical fiber laser.
In one embodiment of the invention, all devices of optical fiber laser all band tail optical fibers, and pass through optical fiber splicer
Fuse together, constitute all optical fibre structure；Owing in all optical fibre structure, optical fiber is all welded together, long range propagation is not required to
The mechanically actuateds such as light modulation to be carried out ensure that each device of laser is directed at, the most non-maintaining, also improve stability.
In foregoing invention embodiment, optical fiber laser includes resonance source, a stage power amplifier, and be located at resonance source with
The first mode stripper between one stage power amplifier；Resonance source includes successively: resonance pumping source, resonance pump signal bundling device, height
Anti-fiber grating, the first gain media, and low anti-fiber grating；One stage power amplifier includes successively: amplify pumping source, amplification
Pump signal bundling device, the second gain media, the second mode stripper, collimator.Seed laser is produced, through one-level by resonance source
Power amplifier can obtain the high power laser light output more than 2KW；First mode stripper, the second mode stripper can be in time to the pumps remained
Pu light filters, and improves stability and the accuracy of Laser Transmission, reduces probability nonlinear effect occur, also avoid
The interference that laser propagation process is caused by residual pump light；The optical device arrangement of optical fiber laser is more reasonable simultaneously, technique
More stable, reliable, multiple detector is set, reduces resonance pumping source, amplify pumping source or guide electro-optical device to be broken
Probability.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any amendment, equivalent and the improvement etc. made within god and principle, should be included within the scope of the present invention.
Claims (10)
1. an optical fiber laser, it is characterised in that including:
Produce the resonance source of seed laser, described seed laser is carried out a stage power amplifier of power amplification, and be located at
The first mode stripper between described resonance source and a described stage power amplifier；
Described resonance source includes on the direction of a described stage power amplifier output successively along laser: resonance pumping source, resonance
Pump signal bundling device, high anti-fiber grating, the first gain media, and low anti-fiber grating；
The direction that a described stage power amplifier exports along laser includes successively: amplify pumping source, amplify pump signal bundling device,
Second gain media, the second mode stripper, collimator.
2. optical fiber laser as claimed in claim 1, it is characterised in that described resonance pumping source all comprises with amplifying pumping source
The semiconductor laser of at least one tail optical fiber output, and pumping direction is identical, is forward pumping.
3. optical fiber laser as claimed in claim 2, it is characterised in that the power of described amplification pumping source is more than described resonance
The output of pumping source.
4. optical fiber laser as claimed in claim 1, it is characterised in that described optical fiber laser also includes by described resonance
The guide electro-optical device of the main optical path of the signal incoming end incoming fiber optic laser instrument of pump signal bundling device.
5. optical fiber laser as claimed in claim 1, it is characterised in that described first gain media, the second gain media are
The non-circular optical fiber of double clad, and surface is covered with heat eliminating medium.
6. optical fiber laser as claimed in claim 1, it is characterised in that described first mode stripper, the second mode stripper are multistage
Formula structure.
7. optical fiber laser as claimed in claim 1, it is characterised in that described optical fiber laser also includes can be to described resonance
The first detector that in source, the laser of reversely output is monitored, and be located between described first detector and described resonance source
Wavelength division multiplexer.
8. optical fiber laser as claimed in claim 1, it is characterised in that described first mode stripper and described one-level power amplification
The second detector it is provided with between device.
9. optical fiber laser as claimed in claim 1, it is characterised in that be provided with the between described second mode stripper and collimator
Three detectors.
10. optical fiber laser as claimed in any one of claims 1 to 9 wherein, it is characterised in that the institute in described optical fiber laser
There are optics all band tail optical fibers, and are welded together, form all optical fibre structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610686551.7A CN106159655A (en) | 2016-08-19 | 2016-08-19 | A kind of optical fiber laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610686551.7A CN106159655A (en) | 2016-08-19 | 2016-08-19 | A kind of optical fiber laser |
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| CN106159655A true CN106159655A (en) | 2016-11-23 |
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| CN201610686551.7A Pending CN106159655A (en) | 2016-08-19 | 2016-08-19 | A kind of optical fiber laser |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107123923A (en) * | 2017-05-26 | 2017-09-01 | 深圳市创鑫激光股份有限公司 | Optical fiber laser, the guard method of optical fiber laser and storage medium |
| CN107681423A (en) * | 2017-09-28 | 2018-02-09 | 深圳市杰普特光电股份有限公司 | Optical fiber laser |
| CN110412691A (en) * | 2019-09-06 | 2019-11-05 | 珠海光库科技股份有限公司 | Collimator and laser |
| CN110429459A (en) * | 2019-07-31 | 2019-11-08 | 深圳市镭神智能系统有限公司 | A kind of fiber amplifier |
| CN111129933A (en) * | 2018-10-31 | 2020-05-08 | 大族激光科技产业集团股份有限公司 | All-fiber air-cooled thulium laser |
| CN111541140A (en) * | 2020-04-02 | 2020-08-14 | 山东大学 | Yb-YAG ultrashort pulse laser amplifier based on brightness cascade pump |
| CN114204393A (en) * | 2021-12-17 | 2022-03-18 | 深圳泰德激光技术股份有限公司 | Optical fiber laser |
| CN115415673A (en) * | 2022-09-15 | 2022-12-02 | 浙江金洲激光科技有限公司 | Kilowatt-level high-power laser cleaning equipment |
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| CN101969172A (en) * | 2010-08-24 | 2011-02-09 | 浙江大学 | Yb-doped fiber laser based on pulse laser seeds in gain modulation technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107123923A (en) * | 2017-05-26 | 2017-09-01 | 深圳市创鑫激光股份有限公司 | Optical fiber laser, the guard method of optical fiber laser and storage medium |
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| CN110429459A (en) * | 2019-07-31 | 2019-11-08 | 深圳市镭神智能系统有限公司 | A kind of fiber amplifier |
| CN110412691A (en) * | 2019-09-06 | 2019-11-05 | 珠海光库科技股份有限公司 | Collimator and laser |
| CN111541140A (en) * | 2020-04-02 | 2020-08-14 | 山东大学 | Yb-YAG ultrashort pulse laser amplifier based on brightness cascade pump |
| CN111541140B (en) * | 2020-04-02 | 2021-08-06 | 山东大学 | Yb-YAG ultrashort pulse laser amplifier based on brightness cascade pump |
| CN114204393A (en) * | 2021-12-17 | 2022-03-18 | 深圳泰德激光技术股份有限公司 | Optical fiber laser |
| CN115415673A (en) * | 2022-09-15 | 2022-12-02 | 浙江金洲激光科技有限公司 | Kilowatt-level high-power laser cleaning equipment |
| CN115415673B (en) * | 2022-09-15 | 2023-11-14 | 浙江金洲激光科技有限公司 | Kilowatt-level high-power laser cleaning equipment |
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Application publication date: 20161123 |