CN205811268U - All-fiber adjusts Q optical fiber seed source laser - Google Patents
All-fiber adjusts Q optical fiber seed source laser Download PDFInfo
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- CN205811268U CN205811268U CN201620765829.5U CN201620765829U CN205811268U CN 205811268 U CN205811268 U CN 205811268U CN 201620765829 U CN201620765829 U CN 201620765829U CN 205811268 U CN205811268 U CN 205811268U
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Abstract
The utility model discloses a kind of all-fiber and adjust Q optical fiber seed source laser, including pumping source (1), fiber coupler (2) resonant cavity, this resonator cavity includes fiber grating the first cav-ity mirrors (3), gain media (4), acousto-optic modulator (5) and fiber grating cavity output reflector (6)；Wherein, gain media (4) and acousto-optic modulator (5) are located in this resonator cavity；The light that pumping source (1) sends passes through fiber coupler (2) input optical fibre grating the first cav-ity mirrors (3), exports from fiber grating cavity output reflector (6) after resonator cavity again；This acousto-optic modulator (5) is Q-switching device, uses first-order diffraction as the logical light path of laser signal light.This utility model can produce high stable, and the short pulse with nanosecond order rushes the seed source laser output of all-fiber.
Description
Technical field
This utility model relates to laser instrument, particularly relates to a kind of novel all-fiber Q adjusting optical fiber laser seed source and swashs
Light device.
Background technology
Along with the development of optical fiber laser, high-capacity optical fiber laser becomes the direction of research.And obtaining high power
What aspect used optical fiber laser based on master oscillator power amplifier (MOPA) structure is the most popular a kind of mode.
The output of laser power in seed source meeting strong influence whole system in master oscillator power amplifier structure
Stability.So going for stable high power laser light output, reliable and stable seed source plays vital effect.
Obtaining stable seed source has multiple form, Q-regulating technique to be exactly a kind of acquisition nanosecond pulse, MW class its peak work
The best means of rate.The method adjusting Q has a lot, main actively Q-switched and passive Q-adjusted two kinds；In passive Q-adjusted, mainly saturable is inhaled
Acceptor adjusts Q, it is not easy to manual control.In actively Q-switched, mainly acousto-optic adjusts Q, electric-optically Q-switched.The half-wave voltage of electric-optically Q-switched needs
The highest, easily electronic circuit is produced interference；And acousto-optic Q modulation modulation voltage need not the highest, lying prostrate the most permissible 100, it is easy to even more
Continuous laser instrument coordinates adjusts Q, can obtain KHz Gao Zhongying giant-pulse, and pulse is reproducible, and can obtain peak power is hundreds of thousand
Watt, pulsewidth be the giant-pulse of tens nanoseconds.Due to above advantage, Q-regulating technique based on acousto-optic modulator becomes research and makes
Focus.
But in the laser instrument of the acousto-optic Q modulation of all-fiber, owing to Zero-order diffractive light path is simple, so generally using zero
Order diffraction.But the diffraction efficiency of Zero-order diffractive is about 85%, during voltage-drop loading, still have a small amount of photon and pass through,
The inverted population of energy level so can be lost.If being instead based on the first-order diffraction of acousto-optic modulator as laser via,
In principle, when on-load voltage disconnects, not having any light by acousto-optic modulator, this can make intracavity Q-value the lowest, it is easier to obtains
High-power laser exports.
So if able to the first-order diffraction based on acousto-optic modulator obtaining all-fiber is led to as flashlight resonator cavity
Road, and can stabilized lasers output seed source laser become the most meaningful.
Utility model content
The purpose of this utility model is to obtain one based on acousto-optic modulator first-order diffraction as laserresonator path, and
The seed source laser of the all-fiber that can stably export.
This utility model, for reaching above-mentioned purpose, be the technical scheme is that
A kind of all-fiber is provided to adjust Q optical fiber seed source laser, including pumping source, fiber coupler resonant cavity, should
Resonator cavity includes fiber grating the first cav-ity mirrors, gain media, acousto-optic modulator and fiber grating cavity output reflection
Mirror；Wherein, in gain media and acousto-optic modulator are located at this resonator cavity；
The light that pumping source sends passes through fiber coupler input optical fibre grating the first cav-ity mirrors, after resonator cavity again
Export from fiber grating cavity output reflector；
This acousto-optic modulator is Q-switching device, uses first-order diffraction as the logical light path of laser signal light.
All-fiber described in the utility model adjusts Q optical fiber seed source, and pumping source is the semiconductor laser of band tail optical fiber.
All-fiber described in the utility model adjusts Q optical fiber seed source, and fiber coupler is two-in-one bonder, including pump
Pu optical coupling input, flashlight couple input and pump light signals combiner outfan, this pump light signals combiner is defeated
Go out end to be connected with fiber grating the first cav-ity mirrors.
All-fiber described in the utility model adjusts Q optical fiber seed source, and fiber grating the first cav-ity mirrors is high reflection
The fiber grating of rate.
All-fiber described in the utility model adjusts Q optical fiber seed source, and gain media is the double clad of doped with rare-earth elements
Optical fiber.
All-fiber described in the utility model adjusts Q optical fiber seed source, and fiber grating cavity output reflector is low reflection
The fiber grating of rate, also serves as the output coupler of laser instrument simultaneously.
All-fiber described in the utility model adjusts Q optical fiber seed source, and acousto-optic modulator includes that two ends are all with optical fiber tail
Fine fiber optic collimator mirror and the acousto-optic crsytal controlled by external voltage, one end optical fiber pigtail is connected by welding with gain media,
Other end optical fiber pigtail is connected with the low reflective grid welding of fiber grating cavity output reflector.
This utility model produces and provides the benefit that: all-fiber of the present utility model adjusts Q optical fiber seed source laser, pump
The light that source, Pu sends passes through fiber coupler input optical fibre grating the first cav-ity mirrors, again from fiber grating after resonator cavity
Cavity output reflector exports；Wherein this acousto-optic modulator is Q-switching device, uses first-order diffraction as the logical light of laser signal light
Path, such that it is able to produce high stable, the short pulse with nanosecond order rushes the seed source laser output of all-fiber.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the structural representation of this utility model embodiment；
Fig. 2 is that the Zero-order diffractive of this utility model embodiment acousto-optic modulator is as cut-away view during laser via.
Fig. 3 is that this utility model embodiment utilizes the first-order diffraction of acousto-optic modulator as internal junction during flashlight path
Composition.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to this utility model.Should be appreciated that specific embodiment described herein is only in order to explain this
Utility model, is not used to limit this utility model.
As it is shown in figure 1, all-fiber of the present utility model adjusts Q optical fiber seed source laser, including pumping source 1, optical fiber coupling
Clutch 2 resonant cavity, resonator cavity includes fiber grating the first cav-ity mirrors 3, gain media 4, acousto-optic modulator 5 and optical fiber light
Grid cavity output reflector 6, wherein gain media 4 and acousto-optic modulator 5 are each provided at intra resonant cavity.
In an embodiment of the present utility model, pumping source 1 is the semiconductor laser of band tail optical fiber, and this mode is beneficial to real
Existing all-fiber；Fiber coupler 2 is a two-in-one bonder, including coupling pump light input, flashlight coupling input
End and pump light signals combiner outfan；Coupling pump light input is connected with pumping source 1, and pump light signals combiner exports
End is connected with fiber grating the first cav-ity mirrors 3.
In an embodiment of the present utility model, fiber grating the first cav-ity mirrors 3 is that the height of signal light wavelength is reflective
Grid；Gain media 4 is the doubly clad optical fiber of doped with rare-earth elements；Fiber grating cavity output reflector 6 is the light of antiradar reflectivity
Fine grating, also serves as the output coupler of optical fiber laser simultaneously.One end of the gain media 4 of doped rare earth element couples with optical fiber
The input of acousto-optic modulator 5 connected by welding；The other end of gain media 4 and the first cavity reflections of optical fiber laser
Mirror 3 connects.
The pumping source 1 pump light input coupling input by fiber coupler 2, through fiber grating the first cavity reflections
Mirror 3 is input in resonator cavity, gain media 4 carries out excitation and produces flashlight gain；Flashlight laser is again from fiber grating chamber
Body output reflector 6 exports.
In an embodiment of the present utility model, acousto-optic modulator 5 includes that two ends are all with the fiber optic collimator of optical fiber pigtail
Mirror 51 and the acousto-optic crsytal 52 controlled by external voltage, one end optical fiber pigtail of acousto-optic modulator 5 and gain media 4 pass through welding
Connecting, other end optical fiber pigtail is connected with the low reflective grid welding of fiber grating cavity output reflector 6.Acousto-optic modulator 5 by
The control of external voltage signal, applies electric voltage frequency and dutycycle by regulation, makes laser instrument seed source obtain 10KHz and arrives
The continuously adjustable nano second laser pulse of 100KHz exports.Photomodulator is as Q-switching device, at optical fiber laser intracavity as damage
Consumption modulation device produces short pulse punching, high-power laser pulse, is thus truly realized and is put as Q-switching device by acousto-optic modulator
Put the intra resonant cavity at all-fiber laser instrument.
Acousto-optic modulator 5 needs the logical light path using first-order diffraction as its primary resonance chamber, it is ensured that at voltage-drop loading
During shutoff, on gain media, level inversion population will not be consumed.By adjusting the optical fiber collimator at acousto-optic modulator two ends,
Making when on-load voltage, diffraction energy focuses primarily upon in the first-order diffraction light path of acousto-optic modulator, and by acousto-optic modulator
First-order diffraction leads to light path as laser resonant cavity.
Part composition resonator cavity between fiber grating the first cav-ity mirrors 3 and fiber grating cavity output reflector 6, two
The reflection wavelength of individual grating needs to be mutually matched, and so could be conducive to obtaining monochromaticity preferably signal light wavelength laser defeated
Go out.
To sum up, the all-fiber of a preferred embodiment of the present utility model adjusts Q optical fiber seed source laser, with band tail optical fiber
Semiconductor laser as pumping source, by the reflective grid of the height of a signal light wavelength and the two of the low reflective grid of signal light wavelength
Individual reflecting mirror constitutes resonator cavity, and whole resonator cavity uses simplest linear resonant cavity, and intra resonant cavity contains and is situated between as gain
The doped fiber of matter and the acousto-optic modulator as Q-switching device.Acousto-optic modulator is with fiber optic collimator that two ends are two band tail optical fibers
The mode of mirror is linked into laser resonator intracavity, and uses the first-order diffraction logical light as laser resonant cavity of acousto-optic modulator
Path.
RF in acousto-optic modulator diagram represents external signal generator, by frequency and the duty of regulation signal generator
Formed than the grating controlling acousto-optic modulation crystal.Acousto-optic absorber 51, is equivalent to electroacoustic transducer, the high frequency sent into outside
Signal, is converted to ultrasound wave.Ultrasound wave can act on interaction material 52, makes medium refraction index that week to occur by photoelastic effect
Phase property changes, and forms corresponding grating.When there being light path to pass through, diffraction will occur, thus zero level occurs, one-level and higher
The optical diffraction of level.
Acousto-optic modulator 5 can use the structure shape that the fiber optic collimator mirror 53 of two ends band tail optical fiber and acousto-optic crsytal intercouple
Formula.As in figure 2 it is shown, be that the Zero-order diffractive of acousto-optic modulator 5 is as cut-away view during laser via.Now on-load voltage,
Can make acousto-optic modulator 5 that diffraction occurs, the highest can reach 85% energy diffraction, but still have light and can be spread out by zero level
Penetrate, thus the inverted population of energy level can be consumed.When voltage disconnects, light path will be made to pass through at Zero-order diffractive completely.
Realize Q-switch laser on one's own initiative by the frequency and dutycycle adjusting voltage to export.
Because Zero-order diffractive is when on-load voltage, still has light path and pass through from Zero-order diffractive, cause level inversion particle
The consumption of number, so being desirable to use one when path turns off, will not consume the mode of inverted population, it is achieved adjust Q
The output of laser.
So this utility model have employed and a kind of utilizes the first-order diffraction of acousto-optic modulator as its laserresonator path
Version realize Q-switch laser output.
As it is shown on figure 3, be that the first-order diffraction utilizing acousto-optic modulator 5 is as cut-away view during flashlight path.Sound
The photomodulator 5 working method when first-order diffraction is different from working method during Zero-order diffractive.When acousto-optic modulator 5 on-load voltage
Time, light path can mainly move to first-order diffraction, now can transfer to energy is gross energy 67% in first-order diffraction, and now one
Order diffraction is as the logical light path of laser signal light.When voltage disconnects, the flashlight light path of laser can return in Zero-order diffractive,
Now in laser via will not because of have light by and consume level inversion population situation occur.
This utility model is that novel all-fiber adjusts Q optical fiber seed source laser, uses the first-order diffraction of acousto-optic modulator
Resonator cavity passage as its flashlight.When on-load voltage, flashlight can be by the first-order diffraction passage of acousto-optic modulator
Carry out flashlight gain amplification, when voltage disconnects, only carry out the pump light pumping to gain media, when on-load voltage next time,
The upper level atom transition of flashlight excitation is made to produce flashlight gain.By regulating the control electric voltage frequency of acousto-optic modulation and accounting for
Empty ratio, obtains the laser output of 10KHz to 100KHz.
This utility model provides the acousto-optic modulator using all-fiber to be Q switched element in laser cavity, and uses acousto-optic
The first-order diffraction of manipulator is as its flashlight resonator cavity passage；Use pumping semiconductor laser and the pumping of all-fiber coupling
Signal light combiner carries out pumping to gain media, the gain media using rare earth doped fiber to be intracavity signal wavelength laser, adopts
With a pair fiber grating as cav-ity mirrors, and by low reflective grid as laser output coupler, it is finally completed and can produce
High stable, the short pulse with nanosecond order rushes the design that the seed source laser of all-fiber exports.
It should be appreciated that for those of ordinary skills, can be improved according to the above description or be converted,
And all these modifications and variations all should belong to the protection domain of this utility model claims.
Claims (7)
1. an all-fiber adjusts Q optical fiber seed source laser, it is characterised in that include pumping source (1), fiber coupler (2)
Resonant cavity, this resonator cavity include fiber grating the first cav-ity mirrors (3), gain media (4), acousto-optic modulator (5) and
Fiber grating cavity output reflector (6)；Wherein, gain media (4) and acousto-optic modulator (5) are located in this resonator cavity；
The light that pumping source (1) sends passes through fiber coupler (2) input optical fibre grating the first cav-ity mirrors (3), through resonance
Export from fiber grating cavity output reflector (6) again behind chamber；
This acousto-optic modulator (5) is Q-switching device, uses first-order diffraction as the logical light path of laser signal light.
All-fiber the most according to claim 1 adjusts Q optical fiber seed source laser, it is characterised in that pumping source (1) is
Semiconductor laser with tail optical fiber.
All-fiber the most according to claim 1 and 2 adjusts Q optical fiber seed source laser, it is characterised in that fiber coupler
(2) it is two-in-one bonder, exports including coupling pump light input, flashlight couple input and pump light signals combiner
End, this pump light signals combiner outfan is connected with fiber grating the first cav-ity mirrors (3).
All-fiber the most according to claim 3 adjusts Q optical fiber seed source laser, it is characterised in that fiber grating first
Cav-ity mirrors (3) is the fiber grating of high reflectance.
All-fiber the most according to claim 4 adjusts Q optical fiber seed source laser, it is characterised in that gain media (4)
Doubly clad optical fiber for doped with rare-earth elements.
All-fiber the most according to claim 1 adjusts Q optical fiber seed source laser, it is characterised in that fiber grating cavity
Output reflector (6) is the fiber grating of antiradar reflectivity, also serves as the output coupler of laser instrument simultaneously.
All-fiber the most according to claim 1 adjusts Q optical fiber seed source laser, it is characterised in that acousto-optic modulator (5)
Including two ends all with the fiber optic collimator mirror of optical fiber pigtail and the acousto-optic crsytal that controlled by external voltage, one end optical fiber pigtail and increasing
Benefit medium (4) is connected by welding, other end optical fiber pigtail and the low reflective grid welding of fiber grating cavity output reflector (6)
Connect.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620765829.5U CN205811268U (en) | 2016-07-18 | 2016-07-18 | All-fiber adjusts Q optical fiber seed source laser |
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| CN201620765829.5U CN205811268U (en) | 2016-07-18 | 2016-07-18 | All-fiber adjusts Q optical fiber seed source laser |
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| CN108023268A (en) * | 2018-01-05 | 2018-05-11 | 褚宏伟 | A kind of burst mode ultrafast laser and its method of work |
| CN110635340A (en) * | 2018-06-22 | 2019-12-31 | 成都市富克斯激光科技有限公司 | Novel adjustable miniature human eye safety solid laser |
| CN111162436A (en) * | 2020-01-17 | 2020-05-15 | 成都翱翔拓创光电科技合伙企业(有限合伙) | Pulse fiber laser based on side pumping technology |
| CN111900599A (en) * | 2020-06-19 | 2020-11-06 | 广芯微电子（广州）股份有限公司 | Q-switched pulse fiber laser seed source equipment |
| CN112636138A (en) * | 2020-11-30 | 2021-04-09 | 湖北久之洋红外系统股份有限公司 | Dual-wavelength fiber laser |
| CN114389129A (en) * | 2021-12-07 | 2022-04-22 | 华中光电技术研究所（中国船舶重工集团公司第七一七研究所） | Laser system for modular cold atoms |
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| CN117239529A (en) * | 2023-11-16 | 2023-12-15 | 长春理工大学 | High-repetition-frequency anhydrous air-cooling-free laser based on acoustic-optical path regulation and control and output method |
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| CN108023268A (en) * | 2018-01-05 | 2018-05-11 | 褚宏伟 | A kind of burst mode ultrafast laser and its method of work |
| CN108023268B (en) * | 2018-01-05 | 2024-03-15 | 褚宏伟 | Burst pulse mode ultrafast laser and working method thereof |
| CN110635340A (en) * | 2018-06-22 | 2019-12-31 | 成都市富克斯激光科技有限公司 | Novel adjustable miniature human eye safety solid laser |
| CN110635340B (en) * | 2018-06-22 | 2022-01-25 | 成都晶特激光技术有限公司 | Novel adjustable miniature human eye safety solid laser |
| CN111162436A (en) * | 2020-01-17 | 2020-05-15 | 成都翱翔拓创光电科技合伙企业(有限合伙) | Pulse fiber laser based on side pumping technology |
| CN111900599A (en) * | 2020-06-19 | 2020-11-06 | 广芯微电子（广州）股份有限公司 | Q-switched pulse fiber laser seed source equipment |
| CN112636138A (en) * | 2020-11-30 | 2021-04-09 | 湖北久之洋红外系统股份有限公司 | Dual-wavelength fiber laser |
| CN114389129A (en) * | 2021-12-07 | 2022-04-22 | 华中光电技术研究所（中国船舶重工集团公司第七一七研究所） | Laser system for modular cold atoms |
| CN115579718A (en) * | 2022-12-09 | 2023-01-06 | 中国人民解放军国防科技大学 | High-power dual-wavelength random distribution feedback Raman fiber laser |
| CN117239529A (en) * | 2023-11-16 | 2023-12-15 | 长春理工大学 | High-repetition-frequency anhydrous air-cooling-free laser based on acoustic-optical path regulation and control and output method |
| CN117239529B (en) * | 2023-11-16 | 2024-01-23 | 长春理工大学 | High-repetition-frequency anhydrous air-cooling-free laser based on acoustic-optical path regulation and control and output method |
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