CN201853938U - Gain modulation technology-based Yb fiber-doped laser device of pulse laser seed - Google Patents
Gain modulation technology-based Yb fiber-doped laser device of pulse laser seed Download PDFInfo
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- CN201853938U CN201853938U CN2010205085770U CN201020508577U CN201853938U CN 201853938 U CN201853938 U CN 201853938U CN 2010205085770 U CN2010205085770 U CN 2010205085770U CN 201020508577 U CN201020508577 U CN 201020508577U CN 201853938 U CN201853938 U CN 201853938U
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Abstract
The utility model discloses a gain modulation technology-based Yb fiber-doped laser device of pulse laser seed. The laser device consists of a pulse-modulated laser pumping source, a multimode fiber combiner, a fiber grating pair, an Yb-doped double-wrapping layer fiber, an amplification-stage pumping source, a high-power combiner and a double-wrapping layer Yb-doped fiber for amplifying laser power. Due to a gain modulation technology, the laser pumping source is coupled to the Yb-doped double-wrapping layer gain fiber by the multimode fiber combiner to generate the pulse laser of the fiber grating to the limited wave length. The generated pulse laser is taken as a seed source to be amplified by a first-stage fiber amplifier or a multi-stage fiber amplifier. A laser amplifier pumping source is coupled into the double-wrapping layer Yb-doped fiber with large mode field diameter by the high-power combiner. The recurrence frequency-adjustable high-power pulse laser output can be obtained after the power-stage amplification. The utility model can obtain a novel high-power fiber laser pulse seed which is simple in structure, lower in cost, and good in long-time stability.
Description
Technical field
The utility model relates to impulse type and mixes the Yb fiber laser, relates in particular to a kind ofly to mix the Yb fiber laser based on gain modulation technology pulse laser seed.
Background technology
It is a kind of important rare earth ion doped laser with the output of high-peak power laser of realizing application such as high power laser processing at present that impulse type is mixed the Yb fiber laser.Because the Yb ion has better simply two level structures and long last energy level fluorescence lifetime (near 1ms), does not have transition effects on the fluorescence, therefore is beneficial to and realizes the very output of high power laser light; Its long upper level lifetime helps realizing high-power pulse laser output.Fiber laser many advantages of comparing with solid, gas laser: have littler volume; Have big surface area and volume ratio, thermal diffusivity is better, does not need huge water-cooling system; Have better beam quality, can obtain high power laser light output near diffraction limit; Higher energy conversion efficiency; And very high long-term working stability.Therefore, the double-clad optical fiber laser of the current Yb of mixing has replaced conventional laser such as solid, gas fairly largely and has been applied to fields such as optical fiber communication, industrial processes, national defense and military.
Impulse type is mixed two kinds of structures of the general employing of Yb fiber laser: Fabry-Perot-type cavity (F-P chamber) structure and MOPA structure.The pulse laser of F-P cavity configuration by insert the Q switching of loss modulation in the chamber, can be realized pulse laser output; But be subjected to the device performance limitations, be unfavorable for powerful laser output.The MOPA structure is utilized the power amplification of high-performance seed laser, can realize high performance pulse laser output, is the major technique of current realization high power pulse fiber laser.Current, the seed source that the common MOPA structure impulse type that adopts is mixed the Yb fiber laser mainly comprises the sound and light Q adjusting optical fiber laser of full fiberize and the pulse modulation single mode semiconductor laser of multistage pre-amplification.Though the sound and light Q adjusting optical fiber laser of full fiberize is relatively simple for structure, need to adopt the acousto-optic modulator of magnetic tape trailer fibre, production cost and price are higher relatively, and also there is certain problem in the long-time stability of acousto-optic modulator; But the pulse modulation single mode semiconductor laser of multistage pre-amplification need adopt the comparatively single mode semiconductor laser of expensive High Speed Modulation of price, because power output is too small, need just can reach the seed source power requirement through one or more levels pre-amplification, the structure relative complex, cost is higher than the former.
Summary of the invention
The purpose of this utility model is to overcome the deficiency of other impulse type fiber lasers aspect cost and long-time stability, provides a kind of and mixes the Yb fiber laser based on gain modulation technology pulse laser seed.
A kind of Yb fiber laser of mixing based on gain modulation technology pulse laser seed is mixed Yb optical fiber by pulse modulated pumping source, multimode fiber bundling device, high reflectance fiber grating, Yb doping double-cladding optical fiber, antiradar reflectivity fiber grating, amplifying stage pumping source, multimode fiber bundling device, double clad and is formed; Pulse modulated pumping source is mixed Yb optical fiber by optical fiber with multimode fiber bundling device, high reflectance fiber grating, Yb doping double-cladding optical fiber, antiradar reflectivity fiber grating, fiber amplifier pumping source, multimode fiber bundling device, double clad and is linked to each other successively; Be coupled to pulse modulated pumping source laser in the double clad gain fibre of Yb doping by bundling device, generation is limited the pulse laser of wavelength by high reflectance fiber grating, antiradar reflectivity fiber grating, the pulse laser of output is as seed source, being coupled to double clad with the amplifying stage pumping source by the multimode fiber bundling device mixes in the Yb optical fiber, through after the power amplification, obtain the pulse laser output of adjustable repetitive frequency.
The another kind of Yb fiber laser of mixing based on gain modulation technology pulse laser seed is mixed Yb optical fiber by pulse modulated pumping source, multimode fiber bundling device, high reflectance fiber grating, Yb doping double-cladding optical fiber, antiradar reflectivity fiber grating, amplifying stage pumping source, multimode fiber bundling device, double clad and is formed; Pulse modulated pumping source is mixed Yb optical fiber, multimode fiber bundling device, amplifying stage pumping source by optical fiber and multimode fiber bundling device, high reflectance fiber grating, Yb doping double-cladding optical fiber, antiradar reflectivity fiber grating, double clad and is linked to each other successively; Pulse modulated pumping source laser is coupled to by bundling device in the double clad gain fibre of Yb doping, produces the pulse laser that limits wavelength by high reflectance fiber grating, antiradar reflectivity fiber grating.The pulse laser of output is coupled to double clad and mixes in the Yb optical fiber as the laser seed source, and the multimode fiber bundling device is mixed Yb optical fiber with amplifying stage pumping source reverse coupled to the double clad of big mode field diameter, obtains the pulse laser output of adjustable repetitive frequency.
Between described antiradar reflectivity fiber grating and fiber amplifier pumping source, be provided with isolator.Described pulse modulated pumping source is the controlled high power multiple die semiconductor laser of a kind of repetition rate, pulse duration, and operation wavelength is the fine multiple die semiconductor laser of magnetic tape trailer of 1～100W in 900～985nm, power output.Described high reflectance fiber grating and antiradar reflectivity fiber grating are a kind ofly to have the fiber grating of reflectivity at 1020～1085nm wave band, as the resonant cavity of seed laser.Described double clad is mixed the Yb optical fiber that Yb optical fiber that Yb optical fiber is random polarization or polarization keep.
The utility model is in order to solve the present kernel texture complexity of impulse type high-capacity optical fiber laser, cost height, problem that long-time stability are low, obtain the low novel pulsed optical fibre laser seed that has fine long-time stability again of a kind of cost, we have proposed a kind of MOPA structure full fiber type pulse based on gain modulation technology laser seed and have mixed the Yb fiber laser, its seed source structure still is typical F-P cavity configuration, but does not comprise expensive magnetic tape trailer fiber acousto-optic system device.The doubly clad optical fiber of the high power multimode pumping laser pump-coupling high-concentration dopant Yb ion of the generation of its pulse laser by adopting different pulse durations and repetition rate is realized.Based on the gain modulation technology, can obtain laser output than short pulse width (tens of to hundreds of nanosecond pulsewidth).The repetition rate of this output laser is consistent with the repetition rate of pump light.As seed source,, can obtain high-power high quality pulses laser output through one-level (perhaps multistage, as to decide) power amplification on the amplifier target power.
Description of drawings
Fig. 1 a kind ofly mixes Yb optical fiber laser structure schematic diagram based on gain modulation technology pulse laser seed;
Fig. 2 another kind of mixes Yb optical fiber laser structure schematic diagram based on gain modulation technology pulse laser seed;
Fig. 3 is the timing diagram of electric pulse modulated pumping laser and seed laser output.
Embodiment
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing.
As shown in Figure 1, mix Yb optical fiber 9 and form by pulse modulated high power multiple die semiconductor pumping source 1, multimode fiber bundling device 2, high reflectance fiber grating 3, Yb doping double-cladding optical fiber 4, antiradar reflectivity fiber grating 5, amplifying stage pumping source 7, multimode fiber bundling device 8, double clad based on the Yb fiber laser of mixing of gain modulation technology pulse laser seed; Pulse modulated pumping source 1 is mixed Yb optical fiber 9 by optical fiber with multimode fiber bundling device 2, high reflectance fiber grating 3, Yb doping double-cladding optical fiber 4, antiradar reflectivity fiber grating 5, amplifying stage pumping source 7, multimode fiber bundling device 8, double clad and is linked to each other successively; Pulse modulated pumping source laser 1 is coupled to by bundling device 2 in the double clad gain fibre 4 of Yb doping, produces the pulse laser that limits wavelength by high reflectance fiber grating 3, antiradar reflectivity fiber grating 5.The pulse laser of output is coupled to double clad with amplifying stage pumping source 7 by multimode fiber bundling device 8 and mixes in the Yb optical fiber 9 as seed source, through after the power amplification, obtains the pulse laser output of adjustable repetitive frequency.
Between described antiradar reflectivity fiber grating 5 and amplifying stage pumping source 7, be provided with isolator 6, be mainly used in and suppress rear end amplifying stage Laser feedback infringement seed laser.This isolator can be a polarization irrelevant.When the rear end amplifying laser was linear polarization, this isolator need adopt polarization to be correlated with.When seed laser power is big, can omit this isolator.Described pulse modulated pumping source 1 is the controlled high power multiple die semiconductor laser of a kind of repetition rate, pulse duration, and operation wavelength is the fine multiple die semiconductor laser of magnetic tape trailer of 1～100W in 900～985nm, power output.This pulse modulated lasers can be single semiconductor laser, also can be made up of jointly a plurality of semiconductor lasers.Described high reflectance fiber grating 3 and antiradar reflectivity fiber grating 5 are a kind ofly to have the fiber grating of reflectivity at 1020～1085nm wave band, are used for the resonant cavity as seed laser.According to the pulse output characteristic requirement of fiber laser, described double clad is mixed the Yb optical fiber that Yb optical fiber that Yb optical fiber 9 can be random polarization or polarization keep.
As shown in Figure 2, mix Yb optical fiber 9 by pulse modulated pumping source 1, multimode fiber bundling device 2, high reflectance fiber grating 3, Yb doping double-cladding optical fiber 4, antiradar reflectivity fiber grating 5, amplifying stage pumping source 7, multimode fiber bundling device 8, double clad and form based on the Yb fiber laser of mixing of gain modulation technology pulse laser seed; Pulse modulated pumping source 1 is mixed Yb optical fiber 9, multimode fiber bundling device 8, amplifying stage pumping source 7 by optical fiber and multimode fiber bundling device 2, high reflectance fiber grating 3, Yb doping double-cladding optical fiber 4, antiradar reflectivity fiber grating 5, double clad and is linked to each other successively; Pulse modulated pumping source laser 1 is coupled to by bundling device 2 in the double clad gain fibre 4 of Yb doping, produces the pulse laser that limits wavelength by high reflectance fiber grating 3, antiradar reflectivity fiber grating 5.The pulse laser of output is as the laser seed source, the double clad that is coupled to big mode field diameter is mixed in the Yb optical fiber 9, high power multimode fiber bundling device 8 is mixed Yb optical fiber 9 with high power pump source 9 reverse coupled to the double clad of big mode field diameter, obtains the pulse laser output of adjustable repetitive frequency.
Between described antiradar reflectivity fiber grating 5 and amplifying stage pumping source 7, be provided with isolator 6.Described pulse modulated pumping source 1 is the controlled high power multiple die semiconductor laser of a kind of repetition rate, pulse duration, and operation wavelength is the fine multiple die semiconductor laser of magnetic tape trailer of 1～100W in 900～985nm, power output.Described high reflectance fiber grating 3 and antiradar reflectivity fiber grating 5 are a kind ofly to have the fiber grating of reflectivity at 1020～1085nm wave band, as the resonant cavity of seed laser.Described double clad is mixed the Yb optical fiber that Yb optical fiber that Yb optical fiber 9 is random polarizations or polarization keep.
As shown in Figure 3, provided based under the gain modulation technology, the timing diagram of electric pulse modulated pumping laser and seed laser output, when pumping laser power and pulse duration are suitable, can obtain the seed laser of stable individual pulse output, laser repetition rate is consistent with pumping laser, and pulse duration is generally much smaller than the pulse duration of pumping laser.Seed laser output has certain settling time.
The utility model is in order to solve the present kernel texture complexity of impulse type high-capacity optical fiber laser, cost height, problem that long-time stability are low, obtain the low novel pulsed optical fibre laser seed that has fine long-time stability again of a kind of cost, proposed a kind of MOPA structure full fiber type pulse and mixed the Yb fiber laser based on gain modulation technology laser seed, its seed source structure still is typical F-P cavity configuration, but do not comprise expensive magnetic tape trailer fiber acousto-optic system device, therefore become typical all optical fibre structure, do not have space coupling composition.The doubly clad optical fiber of the high power multimode pumping laser pump-coupling high-concentration dopant Yb ion of the generation of its pulse laser by adopting different pulse durations and repetition rate is realized.Based on the gain modulation technology, can obtain laser output than short pulse width (tens of to hundreds of nanosecond pulsewidth).The repetition rate of this output laser is consistent with the repetition rate of pump light.Its power output is higher, as seed source, through one-level (perhaps multistage, as to decide on the amplifier target power) power amplification, can obtain high-power high quality pulses laser output.
Claims (6)
- One kind based on gain modulation technology pulse laser seed mix the Yb fiber laser, it is characterized in that it mixes Yb optical fiber (9) by pulse modulated pumping source (1), multimode fiber bundling device (2), high reflectance fiber grating (3), Yb doping double-cladding optical fiber (4), antiradar reflectivity fiber grating (5), amplifying stage pumping source (7), multimode fiber bundling device (8), double clad and form; Pulse modulated pumping source (1) is mixed Yb optical fiber (9) by optical fiber with multimode fiber bundling device (2), high reflectance fiber grating (3), Yb doping double-cladding optical fiber (4), antiradar reflectivity fiber grating (5), amplifying stage pumping source (7), multimode fiber bundling device (8), double clad and is linked to each other successively; Be coupled to pulse modulated pumping source laser (1) in the double clad gain fibre (4) of Yb doping by bundling device (2), generation is limited the pulse laser of wavelength by high reflectance fiber grating (3), antiradar reflectivity fiber grating (5), the pulse laser of output is as seed source, being coupled to double clad with amplifying stage pumping source (7) by multimode fiber bundling device (8) mixes in the Yb optical fiber (9), through after the power amplification, obtain the pulse laser output of adjustable repetitive frequency.
- One kind based on gain modulation technology pulse laser seed mix the Yb fiber laser, it is characterized in that it mixes Yb optical fiber (9) by pulse modulated pumping source (1), multimode fiber bundling device (2), high reflectance fiber grating (3), Yb doping double-cladding optical fiber (4), antiradar reflectivity fiber grating (5), amplifying stage pumping source (7), multimode fiber bundling device (8), double clad and form; Pulse modulated pumping source (1) is mixed Yb optical fiber (9), multimode fiber bundling device (8), amplifying stage pumping source (7) by optical fiber and multimode fiber bundling device (2), high reflectance fiber grating (3), Yb doping double-cladding optical fiber (4), antiradar reflectivity fiber grating (5), double clad and is linked to each other successively; Be coupled to pulse modulated pumping source laser (1) in the double clad gain fibre (4) of Yb doping by bundling device (2), generation is limited the pulse laser of wavelength by high reflectance fiber grating (3), antiradar reflectivity fiber grating (5), the pulse laser of output is as the laser seed source, the double clad that is coupled to big mode field diameter is mixed in the Yb optical fiber (9), multimode fiber bundling device (8) is mixed Yb optical fiber (9) with amplifying stage pumping source (7) reverse coupled to double clad, obtains the amplification pulse laser output of adjustable repetitive frequency.
- 3. according to claim 1 and 2 a kind of based on gain modulation technology pulse laser seed mix the Yb fiber laser, it is characterized in that between described antiradar reflectivity fiber grating (5) and amplifying stage pumping source (7), being provided with isolator (6).
- 4. according to claim 1 and 2ly a kind ofly mix the Yb fiber laser based on gain modulation technology pulse laser seed, it is characterized in that described pulse modulated pumping source (1) is the controlled high power multiple die semiconductor laser of a kind of repetition rate, pulse duration, operation wavelength is the fine multiple die semiconductor laser of magnetic tape trailer of 1～100W in 900～985nm, power output.
- 5. according to claim 1 and 2ly a kind ofly mix the Yb fiber laser based on gain modulation technology pulse laser seed, it is characterized in that described high reflectance fiber grating (3) and antiradar reflectivity fiber grating (5) are a kind ofly to have the fiber grating of reflectivity at 1020～1085nm wave band, as the resonant cavity of seed laser.
- 6. according to claim 1 and 2 a kind of based on gain modulation technology pulse laser seed mix the Yb fiber laser, it is characterized in that described double clad mixes the Yb optical fiber that Yb optical fiber that Yb optical fiber (9) is random polarization or polarization keep.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103579895A (en) * | 2013-10-09 | 2014-02-12 | 深圳市创鑫激光技术有限公司 | High-power Q-switched pulse optical fiber laser |
| CN109596567A (en) * | 2018-12-19 | 2019-04-09 | 北京航天易联科技发展有限公司 | A kind of methane laser detection device |
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2010
- 2010-08-24 CN CN2010205085770U patent/CN201853938U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103579895A (en) * | 2013-10-09 | 2014-02-12 | 深圳市创鑫激光技术有限公司 | High-power Q-switched pulse optical fiber laser |
| CN103579895B (en) * | 2013-10-09 | 2015-04-22 | 深圳市创鑫激光股份有限公司 | High-power Q-switched pulse optical fiber laser |
| CN109596567A (en) * | 2018-12-19 | 2019-04-09 | 北京航天易联科技发展有限公司 | A kind of methane laser detection device |
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Granted publication date: 20110601 Termination date: 20120824 |