CN105390913A - Erbium-ytterbium co-doped fiber amplifier provided with auxiliary cavity for pumping - Google Patents
Erbium-ytterbium co-doped fiber amplifier provided with auxiliary cavity for pumping Download PDFInfo
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- CN105390913A CN105390913A CN201510975316.7A CN201510975316A CN105390913A CN 105390913 A CN105390913 A CN 105390913A CN 201510975316 A CN201510975316 A CN 201510975316A CN 105390913 A CN105390913 A CN 105390913A
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- ytterbium
- erbium
- pumping
- doped fiber
- fiber grating
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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
- H01S3/06754—Fibre amplifiers
-
- 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
- H01S3/094003—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light the pumped medium being a fibre
-
- 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
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
- H01S3/1601—Solid materials characterised by an active (lasing) ion
- H01S3/1603—Solid materials characterised by an active (lasing) ion rare earth
- H01S3/1608—Solid materials characterised by an active (lasing) ion rare earth erbium
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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
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
- H01S3/1691—Solid materials characterised by additives / sensitisers / promoters as further dopants
- H01S3/1698—Solid materials characterised by additives / sensitisers / promoters as further dopants rare earth
-
- 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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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
The invention discloses an erbium-ytterbium co-doped fiber amplifier provided with an auxiliary cavity for pumping. The erbium-ytterbium co-doped fiber amplifier comprises a signal input end (1), an isolator (2), pumping sources (3), a pumping/signal beam combiner (4), a forward reflection fiber grating (5), an erbium-ytterbium co-doped fiber (6), a backward reflection fiber grating (7) and an output end (8), wherein laser beams output by the pumping sources (3) are sent into the erbium-ytterbium co-doped fiber (6) after sequentially passing through the pumping/signal beam combiner (4) and the forward reflection fiber grating (5), thereby being pumped; a to-be-amplified laser signal is input by the input end (1) and enters the erbium-ytterbium co-doped fiber (6) after sequentially passing through the isolator (2), the signal end of the pumping/signal beam combiner (4) and the forward reflection fiber grating (5); and after the laser signal is amplified, the laser signal is output by the output end (8). According to the erbium-ytterbium co-doped fiber amplifier, Yb-ASE can be effectively restrained and the stability and the pumping conversion efficiency of the erbium-ytterbium co-doped fiber amplifier can be improved.
Description
Technical field
The present invention relates to optical-fiber laser field, particularly a kind of erbium-ytterbium co-doped fiber amplifier with auxiliary resonance chamber.
Background technology
The operation wavelength of erbium-ytterbium co-doped fiber amplifier is positioned at 1.5 micron wavebands, has the advantage of " eye-safe ", has important application in the field such as laser processing, laser ranging.Compared with common erbium-doped fiber amplifier, simultaneously doped with erbium (Er), ytterbium (Yb) two kinds of rare earth ions in the gain fibre of this amplifier.Ytterbium ion mix the concentration quenching effect that effectively can reduce erbium ion, improve its doping content, expand the range of choice of pumping wavelength, thus erbium-ytterbium co-doped fiber amplifier can obtain higher power output.But after ytterbium ion mixes, first pump photon can be absorbed by ytterbium ion, and it is pumped into upper energy level from ground state, the ytterbium ion being then in excitation state again by cross-relaxation by energy trasfer to the erbium ion of surrounding, it is pumped into upper energy level from ground state.Finally, 1.5 micron waveband signals are achieved amplification by the stimulated radiation transition on erbium ion between energy level and ground state.This is a kind of pump mode indirectly.Because ytterbium ion is limited by the speed of cross-relaxation transferring energy to erbium ion, when pumping rate is greater than rate of energy transfer therebetween, energy trasfer just there will be bottleneck effect, causes the ytterbium ion number density being in energy level in gain media to rise.Due to can not immediately by energy transferring to the erbium ion of surrounding, these are in excitation state ytterbium ion to the spontaneous radiation (Yb-ASE) that can produce ytterbium ion radiation wave band (1 micron waveband) during ground state transition.This can cause the waste of energy on the one hand, reduces the pump conversion efficiency of amplifier.On the other hand, along with pumping constantly strengthens, finally can produce self-oscillation or self-pulsing effect, cause amplifier output power unstable, even also can cause the permanent damage of device.Eliminating under high power pump Yb-ASE and the self-oscillation caused and self-pulsing thereof is the key improving erbium-ytterbium co-doped fiber amplifier performance.
Summary of the invention
In order to overcome under high power pump Yb-ASE and the self-oscillation caused thereof and the stability of self-pulsing on erbium-ytterbium co-doped fiber amplifier and the impact of efficiency, the present invention proposes a kind of auxiliary chamber pumping erbium-ytterbium co-doped fiber amplifier, the high reflectance fiber grating pair of 1 micron waveband suitable wavelength is introduced in traditional erbium-ytterbium co-doped fiber amplifier, form the resonant cavity that has auxiliary pumping effect, by the auxiliary pumping effect of this resonant cavity, improve the high power erbium-ytterbium co-doped fiber amplifier of stability and pump conversion efficiency.
The present invention proposes a kind of auxiliary chamber pumping erbium-ytterbium co-doped fiber amplifier, comprise signal input part 1, isolator 2, pumping source 3, pump signal bundling device 4, forward reflection fiber grating 5, erbium-ytterbium co-doped fiber 6, retroreflection optical fiber grating 7, output 8; Wherein:
The laser that pumping source 3 exports, sequentially via pump signal bundling device 4, forward reflection fiber grating 5, is admitted to erbium-ytterbium co-doped fiber 6, carries out pumping to described amplifier; Laser signal to be amplified is inputted by input 1, successively through isolator 2, pump signal bundling device 4 signal end, forward reflection fiber grating 5, enter erbium-ytterbium co-doped fiber 6, described laser signal through amplify after, export via output 8.
Described forward reflection fiber grating is consistent with the reflection wavelength of described retroreflection optical fiber grating and be all positioned at the emission band of ytterbium ion, i.e. 1 micron waveband; The two forms auxiliary chamber, plays auxiliary pump effect to amplifier.
One as claimed in claim 1 auxiliary chamber pumping erbium-ytterbium co-doped fiber amplifier, is characterized in that, the tail optical fiber rubbing down forming described output 8 becomes to have angle; Described angle is generally 8 degree.
Described output 8 tail optical fiber rubbing down becomes to have angle, is generally 8 degree.
Compared with prior art, the present invention effectively can suppress Yb-ASE and improve stability and the pump conversion efficiency of erbium-ytterbium co-doped fiber amplifier.
Accompanying drawing explanation
Fig. 1 is auxiliary chamber pumping erbium-ytterbium co-doped fiber amplifier schematic diagram;
Fig. 2 be introduce pumping behind auxiliary chamber, signal, forward direction optical fiber optical grating reflection, backward fiber grating are reflected in power evolution result schematic diagram in gain fibre;
The grating wavelength change curve of the corresponding optical fiber of spiking output power and optimum fiber length when Fig. 3 is the fiber grating pair adopting different wave length, wherein: a, amplified signal power are with the change curve of optic fiber grating wavelength; B, optimum fiber length are with the change curve of optic fiber grating wavelength;
Reference numeral: 1, input, 2, isolator, 3, Pu pumping source, 4, pump signal bundling device, 5, forward reflection fiber grating, 6, erbium-ytterbium co-doped fiber, 7, retroreflection optical fiber grating, 8, output.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Be illustrated in figure 1 the principle schematic of auxiliary chamber pumping erbium-ytterbium co-doped fiber amplifier.Laser signal wavelength 1550nm to be amplified, power 100mW.Signal is inputted by input 1, enters erbium-ytterbium co-doped fiber 6 successively via isolator 2, pump signal bundling device 4, forward reflection fiber grating 5, through later to reflection fiber grating 7 after being exaggerated, exports from output 8.
For preventing the adverse effect of end face reflection, output 8 tail optical fiber rubbing down angled (being generally 8 degree).In this example, pumping source centre wavelength is 976nm, and power is 10W.Optimizing the optimum gain fiber lengths obtained is 3.25m.Operation principle is, the forward reflection fiber grating of consistent wavelength and retroreflection optical fiber grating form resonant cavity.Under high power pump, the laser generation of respective wavelength in resonant cavity, can be produced, the generation of Yb-ASE can well be suppressed.Laser in resonant cavity can be reuptaked by gain fibre in resonant process, and the power outputed signal under can improving identical pump power, namely improves pump conversion efficiency.
The wavelength being illustrated in figure 2 forward and backward reflection fiber grating is 1028nm, during peak reflectivity 99.9%, and the pump light in gain fibre, flashlight, the front/rear power evolution curve to reflection fiber grating reverberation.Can find out, after introducing a pair high reflectance fiber grating, define laser resonance.
As shown in Figure 3, for adopting the fiber grating pair of different wave length the corresponding relation of spiking output power and optimum fiber length time.A () is for signal power is with the change curve of optic fiber grating wavelength; B () is for optimum fiber length is with the change curve of optic fiber grating wavelength.As a comparison, under same pumping and signal parameter situation, the power output 3.64W of common erbium and ytterbium codoping amplifier, corresponding optimum fiber length is 3.15m, respectively as shown in the horizontal horizontal line in figure (a) and (b).As can be seen from Figure 3, (1) if the reflection wavelength of fiber grating is selected between 1010nm to 1066nm, the raising that after amplifying, the power of output signal all can obtain in various degree; (2) wavelength of fiber grating is shorter, and optimum fiber length is also shorter, even can be also shorter than the optimum fiber length of common erbium-ytterbium co-doped fiber amplifier.
When optic fiber grating wavelength is 1028nm, amplified signal power reaches 4.69W, improve 28.8%, and optimum fiber length is 3.25m than without during auxiliary chamber, and without about the same during auxiliary chamber.
In summary it can be seen, the pump conversion efficiency of amplifier can be significantly improved after introducing the auxiliary chamber of suitable wavelength, laser generation in auxiliary chamber also effectively can suppress spontaneous radiation in common erbium-ytterbium co-doped fiber amplifier and Random Oscillation, can improve its stability.
Claims (3)
1. an auxiliary chamber pumping erbium-ytterbium co-doped fiber amplifier, it is characterized in that, described amplifier comprises signal input part (1), isolator (2), pumping source (3), pump signal bundling device (4), forward reflection fiber grating (5), erbium and ytterbium codoping gain fibre (6), retroreflection optical fiber grating (7), output (8); Wherein:
The laser that a pair pumping source (3) exports, sequentially via pump signal bundling device (4), forward reflection fiber grating (5), is admitted to erbium-ytterbium co-doped fiber (6), carries out pumping to described amplifier; Laser signal to be amplified is inputted by input (1), successively through isolator (2), pump signal bundling device (4) signal end, forward reflection fiber grating (5), enter erbium-ytterbium co-doped fiber (6), described laser signal, after amplifying, exports via output (8).
2. a kind of auxiliary chamber pumping erbium-ytterbium co-doped fiber amplifier as claimed in claim 1, is characterized in that, described forward reflection fiber grating is consistent with the reflection wavelength of described retroreflection optical fiber grating and be all positioned at the emission band of ytterbium ion, i.e. 1 micron waveband; The two forms auxiliary chamber, plays auxiliary pump effect to amplifier.
3. a kind of auxiliary chamber pumping erbium-ytterbium co-doped fiber amplifier as claimed in claim 1, is characterized in that, the tail optical fiber rubbing down forming described output (8) becomes to have angle; Described angle is generally 8 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510975316.7A CN105390913B (en) | 2015-12-22 | 2015-12-22 | Auxiliary chamber pumps erbium-ytterbium co-doped fiber amplifier |
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| CN201510975316.7A CN105390913B (en) | 2015-12-22 | 2015-12-22 | Auxiliary chamber pumps erbium-ytterbium co-doped fiber amplifier |
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| CN105390913A true CN105390913A (en) | 2016-03-09 |
| CN105390913B CN105390913B (en) | 2018-10-23 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106169689A (en) * | 2016-08-25 | 2016-11-30 | 天津大学 | Auxiliary chamber pumping erbium-ytterbium co-doped fiber laser instrument |
| CN109061657A (en) * | 2018-08-13 | 2018-12-21 | 昂纳信息技术（深圳）有限公司 | A kind of solid state light emitter of laser radar and a kind of laser radar |
| CN110571634A (en) * | 2019-08-12 | 2019-12-13 | 武汉光迅科技股份有限公司 | Optical signal output device and method, and storage medium |
| 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 |
| CN112490832A (en) * | 2020-11-24 | 2021-03-12 | 内蒙古大学 | Erbium-ytterbium co-doped optical fiber amplifier and working method thereof |
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| US6240108B1 (en) * | 1999-02-17 | 2001-05-29 | Hughes Electronics Corporation | Cladding pumped fiber laser with reduced overlap between a laser mode and an ion-doped region |
| CN103311786A (en) * | 2013-06-19 | 2013-09-18 | 深圳大学 | Erbium-ytterbium doped fiber laser device for restraining Yb (ytterbium)-ASE (amplifier spontaneous emission) |
| CN104638502A (en) * | 2015-02-06 | 2015-05-20 | 天津大学 | High-power erbium-ytterbium co-doping optical fiber amplifier with one-micron band optical fiber grating |
-
2015
- 2015-12-22 CN CN201510975316.7A patent/CN105390913B/en active Active
Patent Citations (3)
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| US6240108B1 (en) * | 1999-02-17 | 2001-05-29 | Hughes Electronics Corporation | Cladding pumped fiber laser with reduced overlap between a laser mode and an ion-doped region |
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| CN104638502A (en) * | 2015-02-06 | 2015-05-20 | 天津大学 | High-power erbium-ytterbium co-doping optical fiber amplifier with one-micron band optical fiber grating |
Non-Patent Citations (1)
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| GRZEGORZ SOBON ET AL.: "Erbium-ytterbium co-doped fiber amplifier operating at 1550nm with stimulated lasing at 1064nm", 《 OPTICS COMMUNICATIONS》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106169689A (en) * | 2016-08-25 | 2016-11-30 | 天津大学 | Auxiliary chamber pumping erbium-ytterbium co-doped fiber laser instrument |
| CN109061657A (en) * | 2018-08-13 | 2018-12-21 | 昂纳信息技术（深圳）有限公司 | A kind of solid state light emitter of laser radar and a kind of laser radar |
| CN110571634A (en) * | 2019-08-12 | 2019-12-13 | 武汉光迅科技股份有限公司 | Optical signal output device and method, and storage medium |
| CN110571634B (en) * | 2019-08-12 | 2021-02-12 | 武汉光迅科技股份有限公司 | Optical signal output device and method, and storage medium |
| 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 |
| CN112490832A (en) * | 2020-11-24 | 2021-03-12 | 内蒙古大学 | Erbium-ytterbium co-doped optical fiber amplifier and working method thereof |
| CN112490832B (en) * | 2020-11-24 | 2022-05-20 | 内蒙古大学 | Working method of erbium-ytterbium co-doped fiber amplifier |
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| CN105390913B (en) | 2018-10-23 |
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