CN203883306U - Full positive chromatic dispersion and full polarization maintaining optical fiber laser - Google Patents
Full positive chromatic dispersion and full polarization maintaining optical fiber laser Download PDFInfo
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- CN203883306U CN203883306U CN201420227903.9U CN201420227903U CN203883306U CN 203883306 U CN203883306 U CN 203883306U CN 201420227903 U CN201420227903 U CN 201420227903U CN 203883306 U CN203883306 U CN 203883306U
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- 230000010287 polarization Effects 0.000 title claims abstract description 115
- 239000013307 optical fiber Substances 0.000 title claims abstract description 50
- 239000006185 dispersion Substances 0.000 title claims abstract description 19
- 230000008878 coupling Effects 0.000 claims abstract description 46
- 238000010168 coupling process Methods 0.000 claims abstract description 46
- 238000005859 coupling reaction Methods 0.000 claims abstract description 46
- 239000004065 semiconductor Substances 0.000 claims abstract description 11
- 239000000835 fiber Substances 0.000 claims description 98
- 238000005086 pumping Methods 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 230000007774 longterm Effects 0.000 description 4
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- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052689 Holmium Inorganic materials 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 238000004891 communication Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- KJZYNXUDTRRSPN-UHFFFAOYSA-N holmium atom Chemical compound [Ho] KJZYNXUDTRRSPN-UHFFFAOYSA-N 0.000 description 1
- 230000001795 light effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000009022 nonlinear effect Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a full positive chromatic dispersion and full polarization maintaining optical fiber laser comprising a first optical fiber coupling Faraday polarization rotating mirror, a ytterbium-doped optical fiber, a wavelength division multiplexer, a pump light isolator, a semiconductor laser LD, a polarization maintaining optical fiber coupling polarization beam splitter, a polarization maintaining optical fiber coupling total reflecting mirror, a polarization maintaining optical fiber coupler, a polarization maintaining single-mode optical fiber, a second optical fiber coupling Faraday polarization rotating mirror and a narrow-linewidth band-pass filter. Through the design of a cavity structure, when laser pulse has a single round trip in an optical fiber laser cavity, the laser pulse is amplified for multiple times, pulse gains are increased, and the single pulse energy of an output light pulse is increased. Through arrangement of the optical fiber coupling Faraday polarization rotating mirrors positioned at the two ends of a standing wave cavity, the whole optical fiber laser cavity compensates the linear noise and disturbance caused by the environment and is not influenced by the outside. The full positive chromatic dispersion and full polarization maintaining optical fiber laser which is easy to debug is simple in structure, small in environment interference, and broad in application prospects in the industrial field.
Description
Technical field
The utility model relates to ultrafast laser technique field, particularly relates to a kind of Totally positive dispersion, full polarization fibre laser that adopts standing-wave cavity structure and full polarization fibre.
Background technology
Compare conventional solid laser, the advantage such as fiber laser has compact conformation, exempts from adjusting, easy care, low-loss, good beam quality, is widely used in the key areas such as material retrofit, ultrafast optics, the control of time-frequency domain laser accurate, optical communication.In recent years, the tremendous development of optical fiber mode-locking technique, under the reasonable application balance by nonlinear effect in the management of fiber laser cavity internal dispersion and chamber, made fiber laser be improved preferably at single pulse energy, pulse duration and long-time stability output facet.
In the fiber laser of dispersion management, generally introduce negative dispersion by the optics such as grating pair, prism fiber laser cavity internal dispersion is compensated.In introducing these dispersion piece parts, destroy the full optical fiber of fiber laser, regulate difficulty thereby increased fiber laser locked mode.And this type of fiber laser is subject to the impact of ambient noise and variations in temperature directly to cause the unstable of fiber laser mode-lock status.All risk insurance is inclined to one side, the research and development of Totally positive dispersion fiber laser are achieved all optical fibre structure fiber laser.In optical fiber mode locked laser, Totally positive dispersion fiber laser is not in the situation that needing dispersion compensation, owing to not being subject to orphan's effect to the quantitative limitation of fiber laser single pulse energy, the single pulse energy of fiber laser output often can reach even more high-magnitude of nJ.Owing to not needing the introducing of negative dispersion piece part, use full polarization fibre laser to be achieved the impact that is not subject to ambient noise and variations in temperature again.
In Totally positive dispersion, full polarization fibre laser, light pulse is in the inner cyclic process of chamber, gain amplifier in gain media should be large as much as possible, thereby make fiber laser output pulse with larger linear chrip, and this linear-chirped-pulse can, by chirp compensation outside chamber, be compressed pulse duration.Realizing in Totally positive dispersion, full polarization fibre laser, pulse round in chamber is subject to gain media, pump power and pulse to amplify number of times etc. reality factor to limit.
Utility model content
The purpose of this utility model is to provide a kind of pulse in the inner cyclic process of chamber, obtain repeatedly gain amplifier, increase pumping efficiency, Totally positive dispersion, the full polarization fibre laser of the higher single pulse energy of output, this laser has meticulous full-optical-fiber laser cavity configuration, and its pulse output energy is high, extinction ratio is excellent, simple in structure, long-time stability good.
The concrete technical scheme that realizes the utility model object is:
A kind of Totally positive dispersion, full polarization fibre laser, feature is: this laser comprises the first coupling fiber faraday polarization revolving mirror, Yb dosed optical fiber, wavelength division multiplexer, pump light isolator, semiconductor laser LD, polarization maintaining optical fibre coupling polarization beam apparatus, polarization maintaining optical fibre coupling total reflective mirror, polarization-maintaining fiber coupler, polarization-maintaining single-mode fiber, the second coupling fiber faraday polarization revolving mirror and narrow linewidth band pass filter, described the first coupling fiber faraday polarization revolving mirror, Yb dosed optical fiber, wavelength division multiplexer, polarization maintaining optical fibre coupling polarization beam apparatus, narrow linewidth band pass filter, polarization-maintaining fiber coupler, polarization-maintaining single-mode fiber, the second coupling fiber faraday polarization revolving mirror connects successively, semiconductor laser LD, pump light isolator connects wavelength division multiplexer successively, polarization maintaining optical fibre coupling total reflective mirror connects polarization maintaining optical fibre coupling polarization beam apparatus, it between polarization-maintaining fiber coupler and polarization-maintaining single-mode fiber, is welding,
Described semiconductor laser LD is pumping pumping, and Yb dosed optical fiber is for protecting inclined to one side gain fibre; Polarization-maintaining fiber coupler, polarization-maintaining single-mode fiber, the second coupling fiber faraday polarization revolving mirror, narrow linewidth band pass filter, polarization maintaining optical fibre coupling polarization beam apparatus, wavelength division multiplexer, Yb dosed optical fiber, the first coupling fiber faraday polarization revolving mirror and polarization maintaining optical fibre coupling total reflective mirror form standing-wave cavity; Wherein, polarization-maintaining fiber coupler, polarization-maintaining single-mode fiber and the second coupling fiber faraday polarization revolving mirror composition locked mode mechanism.
The utility model adopts standing-wave cavity structural design, and when making laser pulse single coming and going in fiber laser cavity, experience is repeatedly amplified, and has increased pulse gain, makes output optical pulse single pulse energy higher.Be faraday's polarization revolving mirror by placing standing-wave cavity two end mirrors, line noise and disturbance that whole fiber laser cavity causes environment are compensated, be not subject to ectocine.Form one steady in a long-term, the full-optical-fiber laser of high single pulse energy output.
Compared with prior art, the utlity model has following advantage:
1, in the utility model optics cavity, use polarization maintaining optical fibre, relevant inclined to one side device and the polarization maintaining optical fibre coupling polarization beam apparatus protected, effectively controlled the polarization state that light pulse is vibrated in chamber, obtained the light pulse output of High Extinction Ratio.
2, the utility model injects the pump light initial stage at standing-wave cavity, in chamber, due to stimulated Brillouin effect, produces the following nanosecond self-regulated of 100kHz Q phenomenon.
3, in the utility model standing wave device, in the time being greater than the Q impulse gain of light from the catoptrical gain of polarization-maintaining fiber coupler, adjust Q phenomenon suppressed, thereby in chamber, be transformed into mode locking pulse vibration.
4, the utility model can be realized self-starting locked mode, develops into stable mode-locking phenomenon by self-regulated Q phenomenon.
5, the utility model make light pulse in chamber come and go in, repeatedly gained, increased interacvity gain effect.
6, the utility model improves the output pulse stability of fiber laser, regulates chamber intrinsic parameter can realize the output of nanosecond, psec and femtosecond pulse.
7, the utility model adopts and protects Polarization Control in inclined to one side device and chamber, and the anti-environmental interference ability of fiber laser is strengthened, and ability steady in a long-term is strengthened.
8, the utility model is the fine structure of full polarization, has size little, and lightweight, integrated level is high, the feature such as is easy to safeguard and build.
9, the utility model service band can be near 1000 nm or near 1500 nm, can be also other wave band, determines according to different doped with rare-earth elements (ytterbium, erbium, thulium, holmium, praseodymium etc.).
Brief description of the drawings
Fig. 1 the utility model structural representation;
Fig. 2 the utility model process schematic diagram that repeatedly gains;
Fig. 3 the utility model embodiment schematic diagram.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail, so that similar technical staff better understands the utility model.
Consult Fig. 1, the utility model utilizes nonlinear polarization rotation to realize Mode-locking For Lasers and increases light pulse single in chamber and comes and goes by the object of gain, it comprises the first coupling fiber faraday polarization revolving mirror 1, Yb dosed optical fiber 2, wavelength division multiplexer 3, pump light isolator 4, semiconductor laser LD 5, polarization maintaining optical fibre coupling polarization beam apparatus 6, polarization maintaining optical fibre coupling total reflective mirror 7, polarization-maintaining fiber coupler 8, polarization-maintaining single-mode fiber 10, the second coupling fiber faraday polarization revolving mirror 11 and narrow linewidth band pass filter 12, described semiconductor laser LD 5 outgoing pump lights are coupled in standing-wave cavity by wavelength division multiplexer 3 through pump light isolator 4, in the round cycle of oscillation process of light pulse single in chamber, make gain become large through coupling fiber faraday polarization revolving mirror 1, polarization maintaining optical fibre coupling polarization beam apparatus 6 and polarization maintaining optical fibre coupling total reflective mirror 7, twice experience gain fibres 2.Its semiconductor laser LD 5 outgoing pump lights are injecting the standing-wave cavity initial stage, and stimulated Brillouin effect in chamber produces the following nanosecond self-regulated of 100kHz Q phenomenon.Polarization-maintaining fiber coupler 8 is operated in slow axis, and light pulse is through polarization-maintaining single-mode fiber 10 and after the second coupling fiber faraday polarization revolving mirror 11 reflections, and polarization state rotates 90
0, external environment is compensated the linear polarization disturbance of introducing, and the pulsed light of linear polarization will be all by polarization-maintaining fiber coupler 8 losses, only have part to be able to transmission fiber coupler 8 through nonlinear polarization rotation light.In the time that the gain of the transmitted light from polarization-maintaining fiber coupler 8 is greater than the Q impulse gain of light, adjust Q phenomenon suppressed, in chamber, be transformed into mode locking pulse vibration.Partial pulse after locked mode is from polarization-maintaining fiber coupler 8 coupling outputs.
The light pulse light of protecting inclined to one side state goes out to inject wavelength division multiplexer 3 from polarization beam apparatus 6, getting this polarization state is orthogonal polarization state, in gain fibre 2, once amplified, after 1 reflection of faraday's polarization revolving mirror, become horizontal polarization and be incident to polarization beam apparatus 6, total reflection is to total reflective mirror 7, and gain fibre is passed through in reflection again again, light pulse is amplified by gain again, again after 1 reflection of faraday's polarization revolving mirror, become orthogonal polarization state again and be incident to polarization beam apparatus 6, realize circulate the repeatedly effect of gain of pulse in chamber.Form nonlinear polarization rotation locked mode mechanism by polarization-maintaining fiber coupler 8, welding 9, polarization-maintaining single-mode fiber 10 and the second coupling fiber faraday polarization revolving mirror 11; Faraday's polarization revolving mirror 1,11 compensate for ambient line noise and disturbances at standing-wave cavity two ends, are easy to be operated in state steady in a long-term.12 of narrow linewidth band pass filters reduce the function of pulse linear chrip and pulse duration.
Consult Fig. 2, the utility model light pulse polarization state in chamber changes and repeatedly amplification process and principle: can be found out by a in figure, light pulse is incident to polarization beam splitter 6 with horizontal polarization state, directly be transmitted through faraday's polarization revolving mirror 1, b in the drawings, through faraday's polarizer reflective, light pulse polarization state 90-degree rotation is that vertical direction reflects back into polarization beam splitter 6, and be reflected onto total reflective mirror 7, reflex to faraday's polarizing mirror 1 through total reflective mirror 7 and polarization beam splitter 6, c in the drawings, light pulse polarization again 90-degree rotation is that horizontal reflection is to polarization beam splitter 6, and transmission and going out.As can be seen here, while gain media being set between light polarization beam splitting chip 6 and faraday's polariscope, when light pulse once comes and goes in chamber, by gain media, be respectively twice gain through two orthogonal polarization orientation by four times, gain efficiency is improved greatly.
Embodiment
Consult Fig. 3, the present embodiment is that pumping pumping, 976nm high power light isolator 4, single mode gain fibre 2 are that highly doped gain media, two faraday's polarization rotation total reflective mirrors 1,11, polarization beam apparatus 6 and fiber grating 13, wavelength division multiplexer 3, fiber laser coupling follower 8, two polarization maintaining optical fibre interaxial angles are 30 by 976nm semiconductor laser LD 5
0as-welded 9, polarization-maintaining single-mode fiber 10 forms.The chamber mirror that faraday's polarization revolving mirror 1 and 11 is standing-wave cavity.Two chamber mirrors are compensated line noise and disturbance that whole fiber laser cavity causes environment, are not subject to ectocine, make the utility model can long-term stable operation.The pulsed light of horizontal polarization goes out to inject wavelength division multiplexer 3 from polarization beam apparatus 6, in gain fibre 2, once amplified, after 1 reflection of faraday's polarization revolving mirror, become vertical polarization and be incident to polarization beam apparatus 6, total reflection is to fiber grating 13, be equivalent to optical fiber total reflective mirror 7, and gain fibre 2 is passed through in reflection again again, light pulse is amplified by gain again, again after 1 reflection of faraday's polarization revolving mirror, become orthogonal polarization state again and be incident to polarization beam apparatus 6, realize the pulsed light effect that round trip repeatedly gains in chamber, pumping efficiency is improved.The nonlinear polarization rotation locked mode device being formed by fiber laser coupling follower 8, as-welded 9, polarization-maintaining single-mode fiber 10 and faraday's polarization revolving mirror 11; can make low powder pulsed composition be able to loss; and the higher pulse center of power is reflected and is seen through; formation locked mode mechanism, makes the utility model reach mode-lock status.13 of fiber gratings reduce the function of pulse linear chrip and pulse duration.The effect of fiber grating 13, except serving as high reflective mirror, due to its arrowband bandpass filtering effect, also plays a part filter simultaneously.Use fiber grating also to contribute to the initialization of Q-switched fiber laser effect and fiber laser mode-lock status.Fiber grating 13 has replaced narrow linewidth band pass filter 12 in Fig. 1, has equivalent function.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model know-why; also can make some improvement and cavity configuration and change, these improvement and variation also should be considered as protection range of the present utility model.
Claims (1)
1. a Totally positive dispersion, full polarization fibre laser, is characterized in that: this laser comprises the first coupling fiber faraday polarization revolving mirror (1), Yb dosed optical fiber (2), wavelength division multiplexer (3), pump light isolator (4), semiconductor laser LD(5), polarization maintaining optical fibre coupling polarization beam apparatus (6), polarization maintaining optical fibre coupling total reflective mirror (7), polarization-maintaining fiber coupler (8), polarization-maintaining single-mode fiber (10), the second coupling fiber faraday polarization revolving mirror (11) and narrow linewidth band pass filter (12), described the first coupling fiber faraday polarization revolving mirror (1), Yb dosed optical fiber (2), wavelength division multiplexer (3), polarization maintaining optical fibre coupling polarization beam apparatus (6), narrow linewidth band pass filter (12), polarization-maintaining fiber coupler (8), polarization-maintaining single-mode fiber (10), the second coupling fiber faraday polarization revolving mirror (11) connects successively, semiconductor laser LD(5), pump light isolator (4) connects wavelength division multiplexer (3) successively, and polarization maintaining optical fibre coupling total reflective mirror (7) connects polarization maintaining optical fibre coupling polarization beam apparatus (6), is welding (9) between polarization-maintaining fiber coupler (8) and polarization-maintaining single-mode fiber (10),
Described semiconductor laser LD(5) be pumping pumping, Yb dosed optical fiber (2) is for protecting inclined to one side gain fibre; Polarization-maintaining fiber coupler (8), polarization-maintaining single-mode fiber (10), the second coupling fiber faraday polarization revolving mirror (11), narrow linewidth band pass filter (12), polarization maintaining optical fibre coupling polarization beam apparatus (6), wavelength division multiplexer (3), Yb dosed optical fiber (2), the first coupling fiber faraday polarization revolving mirror (1) and polarization maintaining optical fibre coupling total reflective mirror (7) form standing-wave cavity; Wherein, polarization-maintaining fiber coupler (8), polarization-maintaining single-mode fiber (10) and the second coupling fiber faraday polarization revolving mirror (11) composition locked mode mechanism.
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| CN201420227903.9U CN203883306U (en) | 2014-05-06 | 2014-05-06 | Full positive chromatic dispersion and full polarization maintaining optical fiber laser |
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| CN201420227903.9U CN203883306U (en) | 2014-05-06 | 2014-05-06 | Full positive chromatic dispersion and full polarization maintaining optical fiber laser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928830A (en) * | 2014-05-06 | 2014-07-16 | 上海朗研光电科技有限公司 | Full positive dispersion and full polarization maintaining optical fiber laser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928830A (en) * | 2014-05-06 | 2014-07-16 | 上海朗研光电科技有限公司 | Full positive dispersion and full polarization maintaining optical fiber laser |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180918 Address after: 200237 District 2319, room 69, Lane 1985, Chunshen Road, Minhang District, Shanghai 1 district. Co-patentee after: East China Normal University Patentee after: Shanghai Langyan Optoelectronics Technology Co.,Ltd. Address before: 200237 District 2319, room 69, Lane 1985, Chunshen Road, Minhang District, Shanghai 1 district. Patentee before: Shanghai Langyan Optoelectronics Technology Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211013 Address after: Room 4001, building 21, No. 123, Lane 1165, Jindu Road, Minhang District, Shanghai 201100 Patentee after: SHANGHAI LANGYAN OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Patentee after: Chongqing Research Institute of East China Normal University Address before: 200237 District 2319, room 69, Lane 1985, Chunshen Road, Minhang District, Shanghai 1 district. Patentee before: SHANGHAI LANGYAN OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Patentee before: EAST CHINA NORMAL University |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230522 Address after: No. 2, 1st Floor, Building 1, No. 2 Huizhu Road, Yubei District, Chongqing, 401120 Patentee after: Chongqing Huapu Intelligent Equipment Co.,Ltd. Address before: Room 4001, building 21, No. 123, Lane 1165, Jindu Road, Minhang District, Shanghai 201100 Patentee before: SHANGHAI LANGYAN OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Patentee before: Chongqing Research Institute of East China Normal University |
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Granted publication date: 20141015 |