CN102122790A - Single-end optical fiber coupled linear polarization acousto-optic Q-switched optical fiber laser - Google Patents
Single-end optical fiber coupled linear polarization acousto-optic Q-switched optical fiber laser Download PDFInfo
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- CN102122790A CN102122790A CN 201110004288 CN201110004288A CN102122790A CN 102122790 A CN102122790 A CN 102122790A CN 201110004288 CN201110004288 CN 201110004288 CN 201110004288 A CN201110004288 A CN 201110004288A CN 102122790 A CN102122790 A CN 102122790A
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- 230000010287 polarization Effects 0.000 title claims abstract description 40
- 239000013307 optical fiber Substances 0.000 title claims description 44
- 239000000835 fiber Substances 0.000 claims abstract description 56
- 230000008878 coupling Effects 0.000 claims description 16
- 238000010168 coupling process Methods 0.000 claims description 16
- 238000005859 coupling reaction Methods 0.000 claims description 16
- 238000005086 pumping Methods 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000005253 cladding Methods 0.000 claims description 2
- 230000001012 protector Effects 0.000 claims 1
- 238000002834 transmittance Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
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- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005305 interferometry Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000028161 membrane depolarization Effects 0.000 description 1
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
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Abstract
A single-ended fiber-coupled linear polarization acousto-optic Q-switched fiber laser sequentially comprises: the invention has the characteristics of all-fiber module structurization, high repetition frequency adjustability, output of linearly polarized light pulses with narrow pulse width and narrow line width, compact structure, small volume, good stability and strong practicability, and has great application prospect.
Description
Technical field
The present invention relates to fiber laser, particularly a kind of sound and light Q adjusting optical fiber laser of linear polarization of single-end optical fiber coupling, this laser are the full-optical-fiber lasers of the high repetition of output, narrow linewidth, narrow pulsewidth (tens nanosecond of pulse duration), high-peak power.
Technical background
The pulse optical fiber of high repetition, high-peak power, narrow pulsewidth, narrow linewidth all has fabulous researching value and great application prospect in fields such as medical treatment, scientific research, military affairs and industrial processes, all is a direction that receives much concern all the time.Require aspects such as higher precision detection, interferometry, imaging demonstration, optical communication, light sensing, optical nonlinearity frequency inverted, laser beam combination, biologic medical diagnosis, needing to use linearly polarized laser.Therefore, the pulse optical fiber of linear polarization has obtained people's favor with its special advantages.Because the fiber gain medium is longer, and there is certain depolarization effect in ordinary optic fibre for linearly polarized light, so optical-fiber laser is difficult for keeping good linear polarization characteristic in oscillatory process.On the other hand, in order to break through of the restriction of conventional solid optics, reach the important trend that integrated system small-sized, compact, good stability also is the fiber laser development by full fiberize to laser system.
Summary of the invention
The present invention is intended to overcome above-mentioned the deficiencies in the prior art, a kind of linear polarization sound and light Q adjusting optical fiber laser of single-end optical fiber coupling is provided, this laser should have full optic module structuring, high repetition is adjustable, export the linearly polarized light pulse of narrow pulsewidth, narrow linewidth, compact conformation, volume is little, good stability and practical characteristics.
Technical solution of the present invention is as follows:
A kind of linear polarization sound and light Q adjusting optical fiber laser of single-end optical fiber coupling; characteristics are that its formation comprises successively: laser diode pumping source; the pumping protection device; pumping coupler; fiber grating; double clad doping polarization maintaining optical fibre; the fiber port coupled lens; acousto-optic modulator and level crossing; described fiber grating and level crossing constitute linear F-P cavity configuration; double clad doping polarization maintaining optical fibre is as gain media; the laser alignment of the double clad polarization maintaining optical fibre being exported by the fiber port coupled lens arrives acousto-optic modulator; one end of described double clad doping polarization maintaining optical fibre and the coupling of fiber port coupled lens is called rear end face; this rear end face is worn into Brewster's angle; it is vertical with the fast axle or the slow axis of described double clad doping polarization maintaining optical fibre that the normal of this rear end face keeps; to obtain the linear polarization characteristic; described level crossing is positioned at the first-order diffraction light direction of described acousto-optic modulator to form feedback, and laser is by the end output of the fiber grating of described double clad doping polarization maintaining optical fibre.
The focus place that is centered close to described fiber port coupled lens of described double clad doping polarization maintaining optical fibre rear end face.
The first-order diffraction light direction of described level crossing and described acousto-optic modulator is perpendicular, and, laser high saturating to pump light is high anti-.
Described fiber grating is the fiber grating of double clad, and grating only limits core segment, causes the laser part reflection, and the pump light wavelength is not had influence.
The course of work of the present invention is:
The pump light that laser diode pumping source sends passes through the pumping protection device, and being coupled by pumping coupler enters the fiber grating of described magnetic tape trailer fibre from left end, produces stimulated radiation laser in double clad doping polarization maintaining optical fibre.Because the existence of the Brewster's angle of an end of gain fibre and fiber port coupled lens, make linearly polarized light partial reflection, part transmission with the perpendicular direction polarization of this output end face normal, and another polarization direction of quadrature has only transmitted light, does not have reverberation with it, promptly be equivalent to add decay in various degree two polarization directions, make that the laser that has only transmission on the polarization direction takes the lead in producing bigger gain in resonant cavity, come and go and strengthen.The linearly polarized laser that produces enters acousto-optic modulator by the fiber port Lens Coupling, come loss in the periodic modulation chamber by acousto-optic modulator, be coupled into gain fibre after flat mirror reflects once more, at last by fiber grating, thereby the Q impulse of having realized the linearly polarized light fibre laser is exported.
Technique effect of the present invention:
The present invention introduces the single-end optical fiber port and level crossing fixed die blocking structure shortens chamber length, reduced system bulk, and use first-order diffraction light is as the feedback of Q-switch laser in the chamber, make fiber laser simple, compact, avoid extra insertion loss, improved the stability and the efficient of output pulse laser; Adopt Brewster's angle to come control chamber inner laser polarization characteristic, greatly guaranteed the linear polarization characteristic of pulse laser, realized a kind of linear polarization pulse optical fiber of full optical fiber mode blocking structure thus, its structure is compact flexibly, high repetition is adjustable, export the linear polarization pulse of narrow pulsewidth, narrow linewidth, satisfied the demand of various application occasions.
Description of drawings
Fig. 1 is the structural representation of the linear polarization sound and light Q adjusting optical fiber laser of single-end optical fiber coupling of the present invention;
Sectional view when Fig. 2 becomes Brewster's angle for fiber end face of the present invention.
Embodiment
See also Fig. 1, Fig. 1 is the structural representation of the linear polarization sound and light Q adjusting optical fiber laser of single-end optical fiber coupling of the present invention.As seen from the figure; the formation of the linear polarization sound and light Q adjusting optical fiber laser of single-end optical fiber coupling of the present invention comprises laser diode pumping source 1 successively; pumping protection device 2; pumping coupler 3; fiber grating 4 all is fused into one by optical fiber splicer each other with double clad doping polarization maintaining optical fibre 5; double clad doping polarization maintaining optical fibre 5 other ends as gain media are worn into Brewster's angle; as shown in Figure 2; be that the output end face normal becomes Brewster's angle β with shaft axis of optic fibre; because the stress rods 9 in the double clad doping polarization maintaining optical fibre 5 is a slow axis with the axis that the center of fibre core 10 is connected to; the axis of phase quadrature is fast axle with it; need keeping the fast axle vertical (Fig. 2 b) of normal line of butt end and polarization maintaining optical fibre or slow axis simultaneously, vertical (Fig. 2 a); to obtain the linear polarization characteristic; the laser alignment of a end with Brewster's angle of double clad polarization maintaining optical fibre 5 being exported by fiber port coupled lens 6 arrives acousto-optic modulator 7; level crossing 8 is positioned at the first-order diffraction light direction of described acousto-optic modulator 7 to form Laser feedback, and laser is by the fiber grating 4 one ends output of described double clad doping polarization maintaining optical fibre 5.
Lifting specific embodiment below is described below:
See also Fig. 1, the semiconductor laser that to adopt 2 centre wavelengths be 976nm, power output 5.7W connects into Fig. 1 device by (2+1) * 1 pumping coupler with optical fiber splicer, and the double clad polarization maintaining optical fibre length of employing is 3m, and Yb mixes in the fibre core
3+, inner cladding is an octagon, and its maximum gauge is 130 μ m (NA=0.22), and core diameter is 10 μ m (NA=0.08), and used fiber grating centre wavelength is 1080nm.By the pulse duration and the signal repetition rate (identical) of regulating acousto-optic modulator 7 outputs with the repetition of output laser, this laser output repetition is regulated between tens to hundreds of kHz and all can be obtained the stable pulse sequence, the pulse energy that can obtain improves greatly, pulsewidth is in tens nanoseconds, live width is lower than 0.07nm, and degree of polarization is all greater than 14dB.
Experiment shows that the present invention compares with technology formerly, the linear polarization sound and light Q adjusting optical fiber laser of single-end optical fiber coupling of the present invention has the characteristics of compact conformation, all optical fibre structureization, its high repetition is adjustable, export the linear polarization pulse of narrow pulsewidth, narrow linewidth, high-peak power, improved lasing efficiency greatly.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011100042886A CN102122790B (en) | 2011-01-11 | 2011-01-11 | Single-end optical fiber coupled linear polarization acousto-optic Q-switched optical fiber laser |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100042886A CN102122790B (en) | 2011-01-11 | 2011-01-11 | Single-end optical fiber coupled linear polarization acousto-optic Q-switched optical fiber laser |
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| CN102122790A true CN102122790A (en) | 2011-07-13 |
| CN102122790B CN102122790B (en) | 2012-04-18 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103094819A (en) * | 2013-01-16 | 2013-05-08 | 中国科学院上海光学精密机械研究所 | Narrow line width acousto-optic Q-switched thulium mixed fiber laser |
| CN103199418A (en) * | 2013-04-11 | 2013-07-10 | 杭州镭克普光电技术有限公司 | Periodical domain reversal crystal electro-optic Q-switched-based pulse optical fiber laser |
| CN105244747A (en) * | 2015-09-23 | 2016-01-13 | 中国工程物理研究院应用电子学研究所 | High-energy long pulse laser obtaining device, method and application |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003258341A (en) * | 2002-02-21 | 2003-09-12 | Sei Tsunezo | Linear polarized fiber laser and second harmonic output resonator structure |
| CN1527446A (en) * | 2003-09-19 | 2004-09-08 | 中国科学院上海光学精密机械研究所 | Laser diode pumped picosecond active mode-locked solid-state planar waveguide laser |
| CN1866645A (en) * | 2006-06-09 | 2006-11-22 | 中国科学院上海光学精密机械研究所 | Pulse width adjustable acousto-optic Q-switched double-cladding optical fiber laser |
| CN101102032A (en) * | 2007-07-18 | 2008-01-09 | 中国科学院上海光学精密机械研究所 | Stable high repetition rate acousto-optic Q-switched fiber laser |
| US20090067035A1 (en) * | 2007-07-10 | 2009-03-12 | Deep Photonics Corporation | Method and apparatus for continuous wave harmonic laser |
| US20090252454A1 (en) * | 2008-04-04 | 2009-10-08 | Francois Chenard | Fiber-optic termination with brewster angled tip |
-
2011
- 2011-01-11 CN CN2011100042886A patent/CN102122790B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003258341A (en) * | 2002-02-21 | 2003-09-12 | Sei Tsunezo | Linear polarized fiber laser and second harmonic output resonator structure |
| CN1527446A (en) * | 2003-09-19 | 2004-09-08 | 中国科学院上海光学精密机械研究所 | Laser diode pumped picosecond active mode-locked solid-state planar waveguide laser |
| CN1866645A (en) * | 2006-06-09 | 2006-11-22 | 中国科学院上海光学精密机械研究所 | Pulse width adjustable acousto-optic Q-switched double-cladding optical fiber laser |
| US20090067035A1 (en) * | 2007-07-10 | 2009-03-12 | Deep Photonics Corporation | Method and apparatus for continuous wave harmonic laser |
| CN101102032A (en) * | 2007-07-18 | 2008-01-09 | 中国科学院上海光学精密机械研究所 | Stable high repetition rate acousto-optic Q-switched fiber laser |
| US20090252454A1 (en) * | 2008-04-04 | 2009-10-08 | Francois Chenard | Fiber-optic termination with brewster angled tip |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103094819A (en) * | 2013-01-16 | 2013-05-08 | 中国科学院上海光学精密机械研究所 | Narrow line width acousto-optic Q-switched thulium mixed fiber laser |
| CN103199418A (en) * | 2013-04-11 | 2013-07-10 | 杭州镭克普光电技术有限公司 | Periodical domain reversal crystal electro-optic Q-switched-based pulse optical fiber laser |
| CN105244747A (en) * | 2015-09-23 | 2016-01-13 | 中国工程物理研究院应用电子学研究所 | High-energy long pulse laser obtaining device, method and application |
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| CN102122790B (en) | 2012-04-18 |
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Address after: 210038 Jiangsu Province, Nanjing economic and Technological Development Zone No. 12 Chong Xing Ke Lu base room 206 Patentee after: Nanjing light laser technology Co., Ltd. Address before: 210038 Jiangsu Province, Nanjing economic and Technological Development Zone No. 12 Chong Xing Ke Lu base room 206 Patentee before: Nanjing fly Photoelectric Technology Co., Ltd. |
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