CN203760836U - 2-micrometer single frequency fiber laser of belt pump thulium-doped quartz fiber - Google Patents
2-micrometer single frequency fiber laser of belt pump thulium-doped quartz fiber Download PDFInfo
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- CN203760836U CN203760836U CN201420125444.3U CN201420125444U CN203760836U CN 203760836 U CN203760836 U CN 203760836U CN 201420125444 U CN201420125444 U CN 201420125444U CN 203760836 U CN203760836 U CN 203760836U
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- China
- Prior art keywords
- fiber
- bragg grating
- thulium
- laser
- grating fbg
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 239000000835 fiber Substances 0.000 title claims abstract description 50
- 239000010453 quartz Substances 0.000 title abstract 6
- 239000013307 optical fiber Substances 0.000 claims abstract description 59
- 238000002310 reflectometry Methods 0.000 claims abstract description 32
- 239000000377 silicon dioxide Substances 0.000 claims description 35
- 238000005086 pumping Methods 0.000 claims description 29
- 229910052775 Thulium Inorganic materials 0.000 claims description 18
- FRNOGLGSGLTDKL-UHFFFAOYSA-N thulium atom Chemical compound [Tm] FRNOGLGSGLTDKL-UHFFFAOYSA-N 0.000 claims description 18
- 239000007787 solid Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000000985 reflectance spectrum Methods 0.000 claims description 2
- HWBALMSPYAUMMB-UHFFFAOYSA-N 6-fluoro-4h-1,3-benzodioxine-8-carboxylic acid Chemical compound C1OCOC2=C1C=C(F)C=C2C(=O)O HWBALMSPYAUMMB-UHFFFAOYSA-N 0.000 claims 11
- 238000005516 engineering process Methods 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Abstract
Provided is a 2-micrometer single frequency fiber laser of belt pump thulium-doped quartz fiber, comprising a 1570nm belt pump laser, an optical fiber wavelength division multiplexer, a high reflectivity fiber Bragg grating, a thulium-doped quartz fiber, a low reflectivity fiber Bragg grating, and an output fiber. The output tail end of the 1570nm belt pump laser is connected to the pump input end of the optical fiber wavelength division multiplexer. One end of the high reflectivity fiber Bragg grating is connected to the output fiber port of the optical fiber wavelength division multiplexer, and the other end of the high reflectivity fiber Bragg grating is connected to one end of thulium-doped quartz fiber. The other end of the thulium-doped quartz fiber is connected to the low reflectivity fiber Bragg grating. The other end of the low reflectivity fiber Bragg grating is connected to the output fiber, and the single frequency laser is output from the output fiber. The 2-micrometer single frequency fiber laser of belt pump thulium-doped quartz fiber is advantageous in that the structure is simple, performance is stable, size is miniaturized, producing is facilitated and stability is high.
Description
Technical field
The utility model belongs to optical fiber and laser technology field, particularly relates to a kind of with 2 microns of single frequency optical fiber lasers with pumping Can Thulium silica fiber.
Background technology
Fiber laser refers to the laser as gain media with doped rare earth element glass optical fiber, by the different rare earth elements that adulterate, the service band of fiber laser can be extended to from ultraviolet to each infrared wave band, compare with traditional all solid state laser, optical fiber laser structure compactness, be easy to heat management, working stability, be not subject to environmental interference, and single frequency optical fiber laser has good beam quality, coherence length is long, breadth of spectrum line is narrow, the plurality of advantages such as monochromaticjty is good, there is high temporal coherence and extremely low phase noise, thereby in high-end accurate measurement, coherent radar, sensing, medical treatment, in military affairs, there are demand and application prospect widely.
The single-frequency thulium-doped fiber laser that works in 2 μ m is of many uses, because its output wavelength is positioned at human eye safe waveband, and therefore in remote sensing, radar, the field extensive application such as laser micro-hurt medical treatment.In addition the single frequency optical fiber laser of 2 μ m also can be applicable among the development in single-frequency terahertz emission source.Silica fiber is compared with the optical fiber of other materials, development comparative maturity, and its mechanical performance is good.Therefore develop a kind of with significant with 2 microns of single frequency optical fiber lasers of pumping Can Thulium silica fiber.
Summary of the invention
In order to address the above problem, it is a kind of with 2 microns of single frequency optical fiber lasers with pumping Can Thulium silica fiber that the purpose of this utility model is to provide.
In order to achieve the above object, same 2 microns of single frequency optical fiber lasers with pumping Can Thulium silica fiber that the utility model provides comprise: 1570nm is with band pump laser, optical fibre wavelength division multiplexer, high reflectance Fiber Bragg Grating FBG, thulium-doped silica fib, antiradar reflectivity Fiber Bragg Grating FBG and output optical fibre; Wherein, 1570nm is with being with pump laser as same band pumping source, its output tail optical fiber is connected with the pumping input port of optical fibre wavelength division multiplexer, one end of high reflectance Fiber Bragg Grating FBG is connected with the output optical fibre port of optical fibre wavelength division multiplexer, its other end is connected with one end of thulium-doped silica fib, the other end of thulium-doped silica fib is connected with antiradar reflectivity Fiber Bragg Grating FBG, the antiradar reflectivity Fiber Bragg Grating FBG other end is connected with output optical fibre, thus output single-frequency laser.
Described 1570nm is with being the laser that works in 1570nm with pump laser, this laser or be fiber laser, or be all solid state laser, adopt band pump mode together to carry out pumping to gain fibre.
Described high reflectance Fiber Bragg Grating FBG and antiradar reflectivity Fiber Bragg Grating FBG composition laser cavity, and the centre wavelength of high reflectance Fiber Bragg Grating FBG and antiradar reflectivity Fiber Bragg Grating FBG is all greater than 1570nm.
The reflectance spectrum bandwidth of described antiradar reflectivity Fiber Bragg Grating FBG single-frequency output is controlled at <3-4GHz.
Between being connected between being connected between described optical fibre wavelength division multiplexer and high reflectance Fiber Bragg Grating FBG, high reflectance Fiber Bragg Grating FBG and thulium-doped silica fib, thulium-doped silica fib and antiradar reflectivity Fiber Bragg Grating FBG be connected and antiradar reflectivity Fiber Bragg Grating FBG and output optical fibre between be connected the mode that all adopts welding.
The advantages such as that same 2 microns of single frequency optical fiber lasers with pumping Can Thulium silica fiber that the utility model provides have is simple in structure, stable performance and miniaturization, and be convenient to make and stability high.
Brief description of the drawings
The structure chart of same 2 microns of single frequency optical fiber lasers with pumping Can Thulium silica fiber that Fig. 1 provides for the utility model.
Mark in figure: 1.1570nm is with band pump laser, 2. optical fibre wavelength division multiplexer, 3. high reflectance Fiber Bragg Grating FBG, 4. thulium-doped silica fib, 5. antiradar reflectivity Fiber Bragg Grating FBG, 6. output optical fibre.
Embodiment
The same 2 microns of single frequency optical fiber lasers with pumping Can Thulium silica fiber that the utility model provided below in conjunction with the drawings and specific embodiments are elaborated.
As shown in Figure 1, same 2 microns of single frequency optical fiber lasers with pumping Can Thulium silica fiber that the utility model provides comprise: 1570nm is with band pump laser 1, optical fibre wavelength division multiplexer 2, high reflectance Fiber Bragg Grating FBG 3, thulium-doped silica fib 4, antiradar reflectivity Fiber Bragg Grating FBG 5 and output optical fibre 6, wherein: 1570nm is with the same band of band pump laser 1 conduct pumping source, its output tail optical fiber is connected with the pumping input port of optical fibre wavelength division multiplexer 2, 1570nm pumping laser 1 is after optical fibre wavelength division multiplexer 2, thulium-doped silica fib is carried out to pumping, one end of high reflectance Fiber Bragg Grating FBG 3 is connected with the output optical fibre port of optical fibre wavelength division multiplexer 2, its other end is connected with one end of thulium-doped silica fib 4, the other end of thulium-doped silica fib 4 is connected with antiradar reflectivity Fiber Bragg Grating FBG 5, like this, high reflectance Fiber Bragg Grating FBG 3, thulium-doped silica fib 4, antiradar reflectivity Fiber Bragg Grating FBG 5 has just formed laserresonator.Antiradar reflectivity Fiber Bragg Grating FBG 5 other ends are connected with output optical fibre 6, thus output single-frequency laser.
Between being connected between being connected between described optical fibre wavelength division multiplexer 2 and high reflectance Fiber Bragg Grating FBG 3, high reflectance Fiber Bragg Grating FBG 3 and thulium-doped silica fib 4, thulium-doped silica fib 4 and antiradar reflectivity Fiber Bragg Grating FBG 5 be connected and antiradar reflectivity Fiber Bragg Grating FBG 5 and output optical fibre 6 between be connected the mode that all adopts welding.
Described pumping laser is the laser that works in 1570nm, and this laser can be fiber laser, also can be all solid state laser, adopts with band pump mode gain fibre is carried out to pumping.
Described high reflectance Fiber Bragg Grating FBG 3 and antiradar reflectivity Fiber Bragg Grating FBG 5 form laser cavity, and the centre wavelength of high reflectance Fiber Bragg Grating FBG and antiradar reflectivity Fiber Bragg Grating FBG is all greater than 1570nm, such as being 1600nm.
By reducing, laser cavity chamber is long realizes in the output of single-frequency laser; Laser longitudinal module spacing
wherein c is light wave propagation velocity in a vacuum, and n is the refractive index of fiber core, and L is that laser cavity chamber is long, therefore can make laser longitudinal module spacing increase by reducing laser cavity length, and then obtain single-frequency laser output.In the utility model, L=L mixes the low reflective grid tail optical fiber of the high reflective grid tail optical fiber+L of thulium gain fibre+L, by using the highly doped thulium doped fiber of 1-2cm, and reduces grating tail optical fiber length, and laser cavity chamber length is controlled to 2.5-3cm; Be less than 3-4GHz by using arrowband antiradar reflectivity Fiber Bragg Grating FBG 5(to be controlled in addition) can ensure 2 μ m laser single-frequency outputs.
The operation principle of same 2 microns of single frequency optical fiber lasers with pumping Can Thulium silica fiber that the utility model provides is as follows:
1570nm, with the same band pumping source as 2 microns of single frequency optical fiber lasers with pump laser, is coupled into thulium-doped silica fib 4 by optical fibre wavelength division multiplexer 2, and ground state level absorbs 1570nm pumping from low-lying level
3f
6transit to high level
3h
4, from excitation state
3h
4transit to
3f
6near photon in the process of energy level 2 microns of radiation wavelengths.The generation of 2 microns of single-frequency lasers is by using the very short highly doped thulium doped fiber of length and narrow band fiber Bragg grating to realize, due to laser longitudinal module spacing and laser cavity chamber long correlation, reduce laser cavity length and can increase laser longitudinal module spacing, be beneficial to choosing of single longitudinal mode, and narrow band fiber Bragg grating can further limit the wave-length coverage of Output of laser, finally obtain 2 microns of single-frequency laser outputs of narrow linewidth.
Claims (5)
1. with 2 microns of single frequency optical fiber lasers mixing Thulium silica fiber with pumping, it is characterized in that: it comprises that 1570nm is with band pump laser (1), optical fibre wavelength division multiplexer (2), high reflectance Fiber Bragg Grating FBG (3), thulium-doped silica fib (4), antiradar reflectivity Fiber Bragg Grating FBG (5) and output optical fibre (6), wherein, 1570nm is with the same band of band pump laser (1) conduct pumping source, its output tail optical fiber is connected with the pumping input port of optical fibre wavelength division multiplexer (2), one end of high reflectance Fiber Bragg Grating FBG (3) is connected with the output optical fibre port of optical fibre wavelength division multiplexer (2), its other end is connected with the one end of thulium-doped silica fib (4), the other end of thulium-doped silica fib (4) is connected with antiradar reflectivity Fiber Bragg Grating FBG (5), antiradar reflectivity Fiber Bragg Grating FBG (5) other end is connected with output optical fibre (6), thereby output single-frequency laser.
2. according to claim 1 with 2 microns of single frequency optical fiber lasers with pumping Can Thulium silica fiber, it is characterized in that: described 1570nm is the laser that works in 1570nm with band pump laser (1), this laser or be fiber laser, or be all solid state laser, adopt with band pump mode gain fibre is carried out to pumping.
3. according to claim 1 with 2 microns of single frequency optical fiber lasers with pumping Can Thulium silica fiber, it is characterized in that: described high reflectance Fiber Bragg Grating FBG (3) and antiradar reflectivity Fiber Bragg Grating FBG (5) composition laser cavity, and the centre wavelength of high reflectance Fiber Bragg Grating FBG (3) and antiradar reflectivity Fiber Bragg Grating FBG (5) is all greater than 1570nm.
4. according to claim 1 with 2 microns of single frequency optical fiber lasers with pumping Can Thulium silica fiber, it is characterized in that: the reflectance spectrum bandwidth of described antiradar reflectivity Fiber Bragg Grating FBG (5) single-frequency output is controlled at <3-4GHz.
5. 2 microns of single frequency optical fiber lasers with pumping Can Thulium silica fiber according to claim 1, is characterized in that: between being connected between being connected between described optical fibre wavelength division multiplexer (2) and high reflectance Fiber Bragg Grating FBG (3), high reflectance Fiber Bragg Grating FBG (3) and thulium-doped silica fib (4), thulium-doped silica fib (4) and antiradar reflectivity Fiber Bragg Grating FBG (5) be connected and antiradar reflectivity Fiber Bragg Grating FBG (5) and output optical fibre (6) between be connected the mode that all adopts welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420125444.3U CN203760836U (en) | 2014-03-20 | 2014-03-20 | 2-micrometer single frequency fiber laser of belt pump thulium-doped quartz fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420125444.3U CN203760836U (en) | 2014-03-20 | 2014-03-20 | 2-micrometer single frequency fiber laser of belt pump thulium-doped quartz fiber |
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| Publication Number | Publication Date |
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| CN203760836U true CN203760836U (en) | 2014-08-06 |
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| CN201420125444.3U Expired - Lifetime CN203760836U (en) | 2014-03-20 | 2014-03-20 | 2-micrometer single frequency fiber laser of belt pump thulium-doped quartz fiber |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104158072A (en) * | 2014-03-20 | 2014-11-19 | 天津欧泰激光科技有限公司 | In-band pumped 2-micron single-frequency fiber laser with thulium-doped silica fiber |
| CN104538823A (en) * | 2014-12-23 | 2015-04-22 | 中国科学院上海光学精密机械研究所 | 1617-nm passive Q-switched laser of in-band pumping Er:YAG crystals |
| CN109149330A (en) * | 2018-08-30 | 2019-01-04 | 华南理工大学 | A kind of 2 mu m waveband low noise narrow-line width single frequency optical fiber lasers |
-
2014
- 2014-03-20 CN CN201420125444.3U patent/CN203760836U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104158072A (en) * | 2014-03-20 | 2014-11-19 | 天津欧泰激光科技有限公司 | In-band pumped 2-micron single-frequency fiber laser with thulium-doped silica fiber |
| CN104538823A (en) * | 2014-12-23 | 2015-04-22 | 中国科学院上海光学精密机械研究所 | 1617-nm passive Q-switched laser of in-band pumping Er:YAG crystals |
| CN104538823B (en) * | 2014-12-23 | 2017-09-26 | 中国科学院上海光学精密机械研究所 | With band pumping Er:The 1617nm passive Q-regulaitng lasers of YAG crystal |
| CN109149330A (en) * | 2018-08-30 | 2019-01-04 | 华南理工大学 | A kind of 2 mu m waveband low noise narrow-line width single frequency optical fiber lasers |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140806 |