CN106169689A - Auxiliary chamber pumping erbium-ytterbium co-doped fiber laser instrument - Google Patents
Auxiliary chamber pumping erbium-ytterbium co-doped fiber laser instrument Download PDFInfo
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- CN106169689A CN106169689A CN201610727200.6A CN201610727200A CN106169689A CN 106169689 A CN106169689 A CN 106169689A CN 201610727200 A CN201610727200 A CN 201610727200A CN 106169689 A CN106169689 A CN 106169689A
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- wave band
- fiber grating
- ytterbium
- erbium
- fiber
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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
- H01S3/0675—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
- H01S3/05—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
Abstract
The present invention relates to optical-fiber laser field, for stability on laser instrument of the Yb ASE solved under high power pump in erbium-ytterbium co-doped fiber laser instrument and the self-oscillation caused thereof and self-pulsing and the impact of efficiency, it is achieved suppression Yb ASE also improves pump conversion efficiency.The technical solution used in the present invention is, auxiliary chamber pumping erbium-ytterbium co-doped fiber laser instrument, including pumping source, pump combiner, forward reflection Yb wave band fiber grating, forward reflection Er wave band high anti-fiber grating, erbium and ytterbium codoping gain fibre, the low anti-fiber grating of retroreflection Er wave band, retroreflection Yb wave band fiber grating, outfan；The laser of pumping source output sequentially via pump signal bundling device, forward reflection Yb wave band fiber grating, the high anti-fiber grating of forward reflection Er wave band, is admitted to erbium and ytterbium codoping gain fibre, it is carried out pumping；The laser that described laser instrument produces finally exports via outfan.Present invention is mainly applied to fiber laser device design.
Description
Technical field
The present invention relates to optical-fiber laser field, a kind of erbium-ytterbium co-doped fiber with Yb wave band auxiliary resonance chamber swashs
Light device.
Background technology
Spontaneous radiation (the Yb-of the ytterbium ion radiation wave band in erbium-ytterbium co-doped fiber (1 micron waveband) under high power pump
ASE) and the self-oscillation that causes, it is to limit erbium-ytterbium co-doped fiber amplifier and laser output power to improve and stability
Principal element.Simultaneously doped with erbium (Er), two kinds of rare earth ions of ytterbium (Yb) in erbium-ytterbium co-doped fiber.The incorporation of ytterbium ion can have
Effect reduces the concentration quenching effect of erbium ion, improves its doping content, expands the range of choice of pumping wavelength.But due to pump light
Son is mainly absorbed by the ytterbium ion in optical fiber, from ground state, it is pumped into upper energy level, is then in the ytterbium ion of excited state
By cross-relaxation, energy is transferred to the erbium ion of surrounding again, it is pumped into upper energy level from ground state.This is a kind of pump indirectly
Pu mode.Owing to ytterbium ion is limited by the speed of cross-relaxation transmission energy to erbium ion, when pumping rate is more than the two it
Between rate of energy transfer time, energy transfer arise that bottle neck effect, cause the ytterbium ion being in energy level in gain media
Number density rises.Owing to can not transfer energy to the erbium ion of surrounding in time, these are in excited state ytterbium ion to ground state
Yb-ASE can be produced during transition.On the one hand this can cause the waste of energy, reduces pump conversion efficiency.On the other hand, along with
Pumping constantly strengthens, and is eventually produced from Induced Oscillation or self-pulsing, has a strong impact on stablizing of erbium and ytterbium codoping amplifier or laser instrument
Property, the most also can cause the permanent damage of device.
For solving the Yb-ASE problem in erbium-ytterbium co-doped fiber amplifier, we carry in patent [1], [2], [3] respectively
Go out the signal by the Yb wave band at pumping end one suitable wavelength of interpolation or Yb wave band fiber grating or a pair Yb wave band optical fiber
The resonator cavity of optical grating constitution carrys out the Yb-ASE in rejective amplifier, thus the method improving pump conversion efficiency.
Different from erbium-ytterbium co-doped fiber amplifier, erbium-ytterbium co-doped fiber laser instrument does not has input signal, but passes through gain
Stimulated oscillation in medium, produces the laser of specific wavelength.Under high power pump, erbium-ytterbium co-doped fiber laser instrument also can produce
Yb-ASE and the problem such as the unwanted oscillation caused or self-pulsing thereof, make pump conversion efficiency reduction, stability and reliability deteriorate.
Summary of the invention
For overcoming the deficiencies in the prior art, present invention seek to address that under high power pump in erbium-ytterbium co-doped fiber laser instrument
Stability on laser instrument of Yb-ASE and the self-oscillation caused and self-pulsing thereof and the impact of efficiency, propose a kind of auxiliary chamber pumping
Erbium-ytterbium co-doped fiber laser instrument, it is achieved suppress Yb-ASE and improve the purpose of pump conversion efficiency.The technical side that the present invention uses
Case is, auxiliary chamber pumping erbium-ytterbium co-doped fiber laser instrument, including pumping source, pump combiner, forward reflection Yb wave band fiber grating,
The high anti-fiber grating of forward reflection Er wave band, erbium and ytterbium codoping gain fibre, the low anti-fiber grating of retroreflection Er wave band, backward instead
Penetrate Yb wave band fiber grating, outfan；The laser of pumping source output is sequentially via pump signal bundling device, forward reflection Yb wave band
The high anti-fiber grating of fiber grating, forward reflection Er wave band, is admitted to erbium and ytterbium codoping gain fibre, it is carried out pumping；Forward direction
Reflection Yb wave band fiber grating forms auxiliary chamber with retroreflection Yb wave band fiber grating, plays auxiliary pumping effect；Forward reflection Er
The high anti-fiber grating of wave band forms main resonance cavity with the low anti-fiber grating of retroreflection Er wave band, produces the laser of required wavelength；
The laser that described laser instrument produces finally exports via outfan.
The reflection wavelength of the high anti-fiber grating of forward reflection Er wave band and the low anti-fiber grating of retroreflection Er wave band is positioned at
The emission band of erbium ion, i.e. 1.5 micron wavebands, the two constitutes main resonance cavity, produces the laser generation of required wavelength.
The reflection wavelength of forward reflection Yb wave band fiber grating and retroreflection Yb wave band fiber grating is respectively positioned on ytterbium ion
Emission band, i.e. 1 micron waveband, the two constitutes auxiliary chamber, and laser instrument plays suppression Yb-ASE and auxiliary pumping effect.
Before and after the high anti-fiber grating of forward reflection Yb wave band fiber grating, forward reflection Er wave band, order can be exchanged；
Before and after the low anti-fiber grating of retroreflection Er wave band, retroreflection Yb wave band fiber grating, order can also be exchanged.
Use backward pump: described pumping source, pump combiner are arranged on retroreflection Yb wave band fiber grating, outfan
Between.
Use two directional pump: increase a pumping source between retroreflection Yb wave band fiber grating, outfan, pumping is closed
Bundle device, the laser of pumping source output inputs via pump signal bundling device.
The feature of the present invention and providing the benefit that:
The present invention by introducing two fiber gratings to suitable wavelength, one pair of which light at erbium and ytterbium codoping gain fibre two ends
Fine optical grating constitution main resonance cavity, produces the high power laser light of 1.5 micron waveband specific wavelengths by stimulated oscillation；Another is to optical fiber
Optical grating constitution Yb wave band auxiliary resonance chamber, its resonance wavelength is positioned at 1 micron waveband, by the stimulated oscillation in auxiliary chamber and heavily inhales
Receive, it is achieved suppress Yb-ASE and improve the purpose of pump conversion efficiency.Compared with prior art, the present invention can suppress effectively
Yb-ASE in gain fibre during high power pump, improves the pump conversion efficiency of high power erbium-ytterbium co-doped fiber laser instrument with steady
Qualitative.
Accompanying drawing illustrates:
Fig. 1 is auxiliary chamber pumping erbium-ytterbium co-doped fiber laser instrument schematic diagram；Wherein (a) is forward pumping mode；B () is backward
Pump mode；C () is two directional pump mode.
Fig. 2 is the power evolution curve of each spectral component in gain fibre.When () has auxiliary chamber a, pumping in gain fibre,
Front/rear to Er wave band optical fiber optical grating reflection, front/rear to Yb fiber grating reflection power develop；When () is without auxiliary chamber b, gain light
Pumping in fibre, the front/rear power evolution to Er wave band optical fiber optical grating reflection
Before and after Fig. 3 is introduced into auxiliary chamber, Yb-ASE composes comparison diagram；
Fig. 4 is the low reflective fine optical grating reflection rate influence curve to output of retroreflection Er wave band.
Reference: 1, pumping source, 2, pump combiner, 3, forward reflection Yb wave band fiber grating, 4, forward reflection Er
The high anti-fiber grating of wave band, 5, erbium and ytterbium codoping gain fibre, 6, the low anti-fiber grating of retroreflection Er wave band, 7, retroreflection Yb
Wave band fiber grating, 8, outfan.
Detailed description of the invention
For the Yb-ASE solved under high power pump in erbium-ytterbium co-doped fiber laser instrument and the self-oscillation caused thereof and
The self-pulsing stability on laser instrument and the impact of efficiency, the present invention proposes a kind of auxiliary chamber pumping erbium-ytterbium co-doped fiber laser
Device.By introducing two fiber gratings to suitable wavelength at erbium and ytterbium codoping gain fibre two ends, one pair of which fiber grating is constituted
Main resonance cavity, produces the high power laser light of 1.5 micron waveband specific wavelengths by stimulated oscillation；Another constitutes Yb to fiber grating
Wave band auxiliary resonance chamber, its resonance wavelength is positioned at 1 micron waveband, by the stimulated oscillation in auxiliary chamber and heavily absorbs, it is achieved suppression
Yb-ASE also improves the purpose of pump conversion efficiency.
The present invention proposes a kind of auxiliary chamber pumping erbium-ytterbium co-doped fiber laser instrument, including pumping source 1, pump combiner 2, front
To reflection Yb wave band fiber grating 3, forward reflection Er wave band high anti-fiber grating 4, erbium and ytterbium codoping gain fibre 5, retroreflection
The low anti-fiber grating 6 of Er wave band, retroreflection Yb wave band fiber grating 7, outfan 8.
The laser of pumping source 1 output is sequentially via pump signal bundling device 2, forward reflection Yb wave band fiber grating 3, forward direction
The high anti-fiber grating 4 of reflection Er wave band, is admitted to erbium and ytterbium codoping gain fibre 5, it is carried out pumping；Forward reflection Yb band of light
Fine grating 3 forms auxiliary chamber with retroreflection Yb wave band fiber grating 7, plays auxiliary pumping effect；Forward reflection Er wave band height is reflective
Fine grating 4 forms main resonance cavity with the low anti-fiber grating 6 of retroreflection Er wave band, produces the laser of required wavelength；Described laser
The laser that device produces finally exports via outfan 8.Before and after 3 and 4, order can be exchanged, and before and after 6 and 7, order can also be mutual
Change, do not affect actual effect.
Described outfan 8 tail optical fiber rubbing down becomes to have angle, usually 8 degree.
Above-mentioned for forward pumping situation, may also take on backward pump shown in the drawings or two directional pump according to actual needs
Scheme.
The present invention will be further described with detailed description of the invention below in conjunction with the accompanying drawings.
Auxiliary chamber pumping erbium-ytterbium co-doped fiber amplifier proposed by the invention can use forward pumping, backward pump or two-way
Pump mode.Its schematic diagram is respectively as shown in Fig. 1 (a), (b), (c).We are embodiment party to the present invention as a example by forward pumping
Formula and effect are described further.
In this example, pumping source centre wavelength used is 976nm, and power is 15W；Gain fibre is CorActive company of Canada
The DCF-EY-10/128 type double clad erbium-ytterbium co-doped fiber produced, optimizing the optimum fiber length obtained is 4.05 meters；Yb wave band
The reflectance of fiber grating pair is 99.9%, and centre wavelength is 1028nm；The centre wavelength of Er wave band grating pair is 1550nm,
The high reflective fine optical grating reflection rate of forward direction is 99.9%, and the reflectance of backward low light reflectivity fibre grating is 15%.Operation principle is:
Under pumping effect, the high reflective grid of Er wave band form main resonance cavity with low reflective grid, produce the laser generation of 1550nm, through low instead
The fraction of laser light of grating forms laser output through outfan.Under high power pump, anti-because of the Yb of bottle neck effect accumulation in resonator cavity
Turn particle, stimulated oscillation can be formed in the auxiliary chamber that a pair high reflective grid of Yb wave band is formed, thus well avoid Yb-ASE
Generation.Laser in auxiliary chamber can be reuptaked by gain fibre and is transferred in main resonance cavity by energy in resonant process
1550nm laser, such that it is able to improve the power of output signal under identical pump power, i.e. improve pump conversion efficiency.
Be illustrated in figure 2 auxiliary chamber and without two kinds of auxiliary chamber in the case of, in laser instrument each spectral component power develop right
Ratio.A () figure has shown auxiliary chamber situation；B () figure show the situation removing auxiliary chamber.From Fig. 2 (a) it can be seen that Yb wave band is auxiliary
Chamber defines the laser generation of stable 1028nm.Main resonance cavity also form the stabilized lasers vibration of 1550nm.Forward direction
The laser generation propagated remains 85% formation after being reflected the low reflective fine optical grating reflection of retroreflection Er wave band that rate is 15% and swashs
Light exports.From figure, data can draw, after adding auxiliary chamber, output is 6.84W, and without output during auxiliary chamber only
5.48W, after i.e. adding auxiliary chamber, output improves about 24.8%, and effect is clearly.
Be illustrated in figure 3, have auxiliary chamber and without two kinds of auxiliary chamber in the case of, in laser instrument Yb-ASE spectrum comparison diagram.Can from Fig. 3
To find out, after introducing the auxiliary chamber of Yb wave band, the most prevailing backward Yb-ASE has obtained obvious suppression, although forward direction
Yb-ASE has strengthened, but Yb-ASE general power is decreased obviously.Reversion grain is consumed owing to the Yb wave band of laser in auxiliary chamber vibrates
Subnumber, Yb-ASE and the wild effect such as the self-oscillation caused and self-pulsing thereof can also effectively be avoided.
Fig. 4 show the low reflective fine optical grating reflection rate impact on output of retroreflection Er wave band.To this example
Speech, this optical grating reflection rate can obtain preferable effect between 10%-15%.Reflectance is the lowest or the highest, output meeting
Decline,
By above-mentioned application examples it can be seen that erbium and ytterbium codoping can be significantly improved after introducing the auxiliary chamber of Yb wave band of suitable wavelength
The pump conversion efficiency of optical fiber laser, the Yb wave band of laser vibration in auxiliary chamber can also effectively suppress general under high power pump
Lead to the Yb-ASE in erbium-ytterbium co-doped fiber laser instrument and the self-oscillation caused thereof or self-pulsing, its stability can be improved.
[cited literature 2]
[1] Han Qun, Ning Jiping, Zhou Lei, Zhang Weiyi, Zhang Weiqing, " improves high power pump erbium-ytterbium co-doped fiber amplifier pump
The method of Pu transformation efficiency, " national inventing patent, ZL200910228944.3, University Of Tianjin, 2011-06-15.(state: award
Power)
[2] Han Qun, Yao Yunzhi, Liu Fangchao, Chen Yaofei, Liu Tiegen, " the high power erbium with 1 micron waveband fiber grating
Ytterbium co-doped fiber amplifier, " national inventing patent, application CN2015100634726, University Of Tianjin 2015-02-06. (state:
Application)
[3] Han Qun, Yao Yunzhi, Liu Fangchao, Chen Yaofei, Liu Tiegen, " the high power erbium with 1 micron waveband fiber grating
Ytterbium co-doped fiber amplifier, " national inventing patent, CN2015100634726, University Of Tianjin 2015-02-06. (state: Shen
Please).
Claims (6)
1. an auxiliary chamber pumping erbium-ytterbium co-doped fiber laser instrument, is characterized in that, including pumping source, pump combiner, forward reflection
The high anti-fiber grating of Yb wave band fiber grating, forward reflection Er wave band, erbium and ytterbium codoping gain fibre, retroreflection Er wave band are low instead
Fiber grating, retroreflection Yb wave band fiber grating, outfan；The laser of pumping source output sequentially closes bundle via pump signal
The high anti-fiber grating of device, forward reflection Yb wave band fiber grating, forward reflection Er wave band, is admitted to erbium and ytterbium codoping gain fibre,
It is carried out pumping；Forward reflection Yb wave band fiber grating and retroreflection Yb wave band fiber grating form auxiliary chamber, play donkey pump
Pu acts on；The high anti-fiber grating of forward reflection Er wave band forms main resonance cavity with the low anti-fiber grating of retroreflection Er wave band, produces
The laser of raw required wavelength；The laser that described laser instrument produces finally exports via outfan.
A kind of auxiliary chamber pumping erbium-ytterbium co-doped fiber laser instrument the most as claimed in claim 1, it is characterised in that forward reflection Er ripple
The reflection wavelength of the high anti-fiber grating of section and the low anti-fiber grating of retroreflection Er wave band is positioned at the emission band of erbium ion, i.e.
1.5 micron wavebands, the two constitutes main resonance cavity, produces the laser generation of required wavelength.
A kind of auxiliary chamber pumping erbium-ytterbium co-doped fiber laser instrument the most as claimed in claim 1, it is characterised in that forward reflection Yb ripple
The reflection wavelength of section fiber grating and retroreflection Yb wave band fiber grating is respectively positioned on the emission band of ytterbium ion, i.e. 1 micron wave
Section, the two constitutes auxiliary chamber, laser instrument plays suppression Yb-ASE and auxiliary pumping effect.
Auxiliary chamber pumping erbium-ytterbium co-doped fiber laser instrument the most as claimed in claim 1, is characterized in that, forward reflection Yb wave band optical fiber
Before and after the high anti-fiber grating of grating, forward reflection Er wave band, order can be exchanged；The low anti-fiber grating of retroreflection Er wave band,
Before and after retroreflection Yb wave band fiber grating, order can also be exchanged.
Auxiliary chamber pumping erbium-ytterbium co-doped fiber laser instrument the most as claimed in claim 1, is characterized in that, uses backward pump: described
Pumping source, pump combiner are arranged between retroreflection Yb wave band fiber grating, outfan.
Auxiliary chamber pumping erbium-ytterbium co-doped fiber laser instrument the most as claimed in claim 1, is characterized in that, uses two directional pump: rear
To reflection between Yb wave band fiber grating, outfan increase pumping source, a pump combiner, pumping source output laser via
Pump signal bundling device inputs.
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| CN201610727200.6A CN106169689A (en) | 2016-08-25 | 2016-08-25 | Auxiliary chamber pumping erbium-ytterbium co-doped fiber laser instrument |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108963738A (en) * | 2018-10-11 | 2018-12-07 | 中国人民解放军国防科技大学 | Double-end output linear cavity all-fiber laser oscillator |
| CN110600983A (en) * | 2019-10-25 | 2019-12-20 | 杭州纤镭光电科技有限责任公司 | Structure for improving conversion efficiency of 1.6 mu m waveband erbium-ytterbium co-doped fiber laser |
| CN112400260A (en) * | 2018-06-29 | 2021-02-23 | Ipg光子公司 | High power ytterbium with 1.02-1.06 μm cladding pumping scheme: erbium (Yb: Er) fiber laser system |
| CN113422278A (en) * | 2021-06-04 | 2021-09-21 | 滨州学院 | Green laser with high frequency doubling efficiency |
| CN113991400A (en) * | 2021-10-25 | 2022-01-28 | 上海拜安实业有限公司 | Fiber laser for realizing high power and high output aiming at laser radar |
| CN114122878A (en) * | 2021-11-24 | 2022-03-01 | 国科大杭州高等研究院 | Laser, optical equipment and production method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101510662A (en) * | 2009-03-18 | 2009-08-19 | 山东大学 | Enhancement type fiber-optical laser for resonant cavity pump |
| CN103107478A (en) * | 2013-01-29 | 2013-05-15 | 中国科学院上海光学精密机械研究所 | Dual-wavelength fiber laser with tunable power ratios |
| CN103199421A (en) * | 2013-04-24 | 2013-07-10 | 中国人民解放军国防科学技术大学 | Two-micron wave band impulse fiber laser based on super-continuum spectrum light source |
| CN105390913A (en) * | 2015-12-22 | 2016-03-09 | 天津大学 | Erbium-ytterbium co-doped fiber amplifier provided with auxiliary cavity for pumping |
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2016
- 2016-08-25 CN CN201610727200.6A patent/CN106169689A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101510662A (en) * | 2009-03-18 | 2009-08-19 | 山东大学 | Enhancement type fiber-optical laser for resonant cavity pump |
| CN103107478A (en) * | 2013-01-29 | 2013-05-15 | 中国科学院上海光学精密机械研究所 | Dual-wavelength fiber laser with tunable power ratios |
| CN103199421A (en) * | 2013-04-24 | 2013-07-10 | 中国人民解放军国防科学技术大学 | Two-micron wave band impulse fiber laser based on super-continuum spectrum light source |
| CN105390913A (en) * | 2015-12-22 | 2016-03-09 | 天津大学 | Erbium-ytterbium co-doped fiber amplifier provided with auxiliary cavity for pumping |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112400260A (en) * | 2018-06-29 | 2021-02-23 | Ipg光子公司 | High power ytterbium with 1.02-1.06 μm cladding pumping scheme: erbium (Yb: Er) fiber laser system |
| CN108963738A (en) * | 2018-10-11 | 2018-12-07 | 中国人民解放军国防科技大学 | Double-end output linear cavity all-fiber laser oscillator |
| CN110600983A (en) * | 2019-10-25 | 2019-12-20 | 杭州纤镭光电科技有限责任公司 | Structure for improving conversion efficiency of 1.6 mu m waveband erbium-ytterbium co-doped fiber laser |
| CN113422278A (en) * | 2021-06-04 | 2021-09-21 | 滨州学院 | Green laser with high frequency doubling efficiency |
| CN113991400A (en) * | 2021-10-25 | 2022-01-28 | 上海拜安实业有限公司 | Fiber laser for realizing high power and high output aiming at laser radar |
| CN114122878A (en) * | 2021-11-24 | 2022-03-01 | 国科大杭州高等研究院 | Laser, optical equipment and production method |
| CN114122878B (en) * | 2021-11-24 | 2023-09-12 | 国科大杭州高等研究院 | Laser, optical device and production method |
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Application publication date: 20161130 |