CN202333430U - All-fibre thulium-doped laser with tunable broadband - Google Patents
All-fibre thulium-doped laser with tunable broadband Download PDFInfo
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- CN202333430U CN202333430U CN2011204630505U CN201120463050U CN202333430U CN 202333430 U CN202333430 U CN 202333430U CN 2011204630505 U CN2011204630505 U CN 2011204630505U CN 201120463050 U CN201120463050 U CN 201120463050U CN 202333430 U CN202333430 U CN 202333430U
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Abstract
The utility model relates to an all-fibre thulium-doped laser with tunable broadband, wherein a 793 nm laser pumping source is connected with the input end a of a multimode/double-clad pumping beam combiner; the input end c of the beam combiner is connected with one end of a double-clad thulium-doped optical fibre; one end b of the beam combiner is connected with one end of an F-P tunable optical fibre etalon; an online polarization controller clamps a part of optical fibres between the beam combiner and the F-P tunable optical fibre etalon therein and keeps no breakage of the optical fibres; the other end of the F-P tunable optical fibre etalon is connected with the input end d of a 2.0 mum-waveband optical fibre coupler, the output end e of the coupler is used as a laser output, and the wavelength of an output optical fibre laser signal is within a 2.0 mum tunable waveband; the output end f of the coupler is connected with the input end of a 2.0 mum-waveband isolator as a feedback, and the output end of the isolator is connected with the other end of the double-clad thulium-doped optical fibre; and the annular cavities formed by the connections above use an all-fibre structure and are all welded by optical fibres. The 2.0 mum-waveband laser obtained by the all-fibre thulium-doped laser with tunable broadband disclosed by the utility model is good in stability, tunable in wavelength broadband and high in cost performance.
Description
Technical field
The utility model belongs to fiber laser manufacturing technology field; Be particularly related to a kind of 2.0 mu m waveband wideband adjustable circular cavity optic fibre lasers of all optical fibre structure, the wideband adjustable optical-fiber laser of its output wavelength that obtains 2.0 mu m wavebands can be applied to numerous areas such as medical treatment, detection, radar.
Background technology
2.0 the mu m waveband fiber laser is one of laser technology of at present tool prospect; 2.0 the laser of mu m waveband is one of best operation tool at medical field; It is safe in utilization to human eye, strong to the penetration capacity of atmosphere and smog; And covering a part of absorption spectrum of hazardous gas such as gas, it also can be used for fields such as remote sensing and laser radar.Adopt thulium doped fiber to do gain medium, because Tm
3+The cross-relaxation process that interionic exists, N
1, N
0→ N
3, N
3The cross-relaxation rate along with Tm
3+The doping content increase increase rapidly, during high-dopant concentration, the cross-relaxation process is strengthened, for N
1, N
3And N
0Spectrum parameter produce very big influence, mix the power output of Tm fiber laser even can reach the level of multikilowatt.
The laser diode-pumped double clad thulium-doped fiber laser of 793nm can obtain high efficiency, adopts ring cavity structure, can realize exporting the wide-band tuning of optical maser wavelength.The experiment structure of thulium-doped fiber laser adopts the free space of optical fiber and various function elements to be coupled both at home and abroad at present, but not all optical fibre structure, this lens and light path that just needs to increase some is aimed at governor motion, and its poor stability, practicality are not strong.
The utility model content
Can not realize defectives such as full fiberize, poor stability, practicality are not strong to present thulium-doped fiber laser; The utility model provides a kind of wideband adjustable thulium-doped fiber laser of all optical fibre structure; It obtains output wavelength tunable range 70nm; And tuning easy, low cost of manufacture, and be easy to fibre system integrated.
The utility model is taked following technical scheme: the complete tunable thulium-doped laser of fiber broadband; Comprise 793nm laser pumping source (1), multimode/double clad pump combiner (2) ("/" expression " with "; The general literary style that belongs to such device), double clad thulium doped fiber (3), online Polarization Controller (4), F-P adjustable optic fibre etalon (5), 2.0 mu m waveband wide-band couplers (6), 2.0 mu m waveband isolators (7); 793nm laser pumping source (1) is connected with the first input end mouth (a) of multimode/double clad pump combiner (2), and second port (c) of multimode/double clad pump combiner (2) is connected with an end of double clad thulium doped fiber (3); The 3rd port (b) of multimode/double clad pump combiner (2) is connected with an end of F-P adjustable optic fibre etalon (5); Online Polarization Controller (4) sandwiches the part optical fiber between multimode/double clad pump combiner (2) and the F-P adjustable optic fibre etalon (5) in it and does not block optical fiber; The other end of F-P adjustable optic fibre etalon (5) is connected with the input (d) of 2.0 mu m waveband fiber couplers (6); 2.0 first output (e) of mu m waveband fiber coupler (6) is as laser output, the optical-fiber laser signal wavelength of output is the tunable wave band of 2.0 μ m; 2.0 second output (f) of mu m waveband fiber coupler (6) is connected with the input of 2.0 mu m waveband isolators (7) as feedback; 2.0 the output of mu m waveband isolator (7) is connected with the other end of double clad thulium doped fiber (3); The annular chamber that said 793nm laser pumping source (1), multimode/double clad pump combiner (2), F-P adjustable optic fibre etalon (5), 2.0 mu m waveband fiber couplers (6), 2.0 mu m waveband fibre optic isolaters (7) and double clad thulium doped fiber (3) are connected to form adopts all optical fibre structure, and fused fiber splice is all adopted in above-mentioned connection.
The tunable thulium-doped laser of described full fiber broadband, first output (e) of 2.0 mu m waveband fiber couplers (6) is 10% output, second output (f) is 90% output.
The tunable thulium-doped laser of described full fiber broadband, the maximum spectrum tuning range of 2.0 mu m waveband optical-fiber laser signals of output is 1940-2010nm, spectral bandwidth is 70nm.
The tunable thulium-doped laser of described full fiber broadband, online Polarization Controller (4) adopts the manual compression formula.
The full fiber broadband of the utility model is tunable 2.0 mu m waveband thulium-doped fiber lasers; Laser pumping source (1) is through multimode/double clad pump combiner (2), pumping double clad thulium doped fiber (3); Produce 2.0 mu m wavebands gain broadband light; Utilize polarization state in the online Polarization Controller of manual compression formula (4) the adjustment laser annular chamber, 90% Ausgang of 2.0 mu m waveband fiber couplers (6) is realized the amplification of light as positive feedback; Utilize the tuning 2.0 mu m waveband laser signal wavelengths of F-P adjustable optic fibre etalon (5), realize that output wavelength 70nm broadband is adjustable.
2.0 mu m waveband thulium-doped fiber lasers of the utility model output wavelength wideband adjustable, the deficiency that it has overcome existing 2.0 mu m waveband tunable optical fiber lasers, problem such as reduced that non-optical fibre device connects that the cavity loss that brings increases and tuning range is little.
The utility model adopts all optical fibre structure, and loss is low, and cost is low, is easy to fibre system integrated.The 2.0 mu m waveband laser good stabilities that the utility model obtains, the wavelength broadband is adjustable, has high cost performance.
Description of drawings
Fig. 1 is Tm
3+Simplification level structure sketch map.
Fig. 2 is the structural representation of wideband adjustable thulium-doped fiber laser.
Fig. 3 is the spectrogram of wideband adjustable output optical fibre laser.
Embodiment
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 2 is the structural representation of wideband adjustable thulium-doped fiber laser.This 2.0 mu m waveband wideband adjustable fiber laser is loop laser resonance cavities that is formed by connecting such as the online Polarization Controller of 793nm laser pumping source 1, multimode/double clad pump combiner 2, double clad thulium doped fiber 3, manual compression formula 4, F-P adjustable optic fibre etalon 5,2.0 mu m waveband wide-band couplers 6,2.0 mu m waveband isolators 7, and it is connected to:
793nm laser pumping source 1 is connected with the input port a of multimode/double clad pump combiner 2, and another input port c of multimode/double clad pump combiner 2 links to each other with an end of double clad thulium doped fiber 3; The port b of multimode/double clad pump combiner 2 is connected with an end of F-P adjustable optic fibre etalon 5; The online Polarization Controller 4 of manual compression formula adopts the method for not blocking optical fiber; Part between multimode/double clad pump combiner 2 and the F-P adjustable optic fibre etalon 5 is connected optical fiber sandwich within its anchor clamps, utilize the mode of manual compression optical fiber to carry out the adjusting of transmitting optical signal polarization state; The other end of F-P adjustable optic fibre etalon 5 is connected with the input d of 2.0 mu m waveband fiber couplers 6; 2.0 10% output e of mu m waveband fiber coupler 6 exports as laser; The optical-fiber laser signal wavelength of output is 2.0 mu m wavebands; 2.0 mu m waveband optical-fiber laser signals of output are tunable, and maximum spectrum tuning range is 1940-2010nm, and spectral bandwidth is 70nm.2.0 90% Ausgang of mu m waveband fiber coupler 6 is connected with the input of 2.0 mu m waveband fibre optic isolaters 7 as feedback; 2.0 the output of mu m waveband fibre optic isolater 7 links to each other with the other end of double clad thulium doped fiber 3.Adopt all optical fibre structure, it all connects through the method for fused fiber splice.
As above connect, the online Polarization Controller of multimode/double clad pump combiner 2, manual compression formula 4, F-P adjustable optic fibre etalon 5,2.0 mu m waveband fiber couplers, 6,2.0 mu m waveband fibre optic isolaters 7 and double clad thulium doped fiber 3 have been connected to form annular chamber.
Devices such as the online Polarization Controller of above-mentioned 793nm laser pumping source 1, multimode/double clad pump combiner 2, double clad thulium doped fiber 3, manual compression formula 4, F-P adjustable optic fibre etalon 5,2.0 mu m waveband wide-band couplers 6,2.0 mu m waveband isolators 7 all adopt prior art.
When 793nm laser pumping source 1 passes through multimode/double clad pump combiner 2, pumping double clad thulium doped fiber 3, in optical fiber, produce the gain of 2.0 mu m waveband broadband light.Utilize its reverse 2.0 mu m waveband broadband light as laser gain, select laser oscillation wavelengths through F-P adjustable optic fibre etalon 5, the chamber length of regulating F-P adjustable optic fibre etalon 5 can change the laser generation sigtnal interval, thereby realizes tuning to laser oscillation wavelength.
The polarization state of regulating resonant laser light through the online Polarization Controller 4 of manual compression formula again keeps higher hunting power.2.0 mu m waveband fibre optic isolater 7 can be guaranteed the signal one-way transmission in the chamber, and can reduce noise, improves signal to noise ratio.
2.0 10% output e of mu m waveband fiber coupler 6 output laser adopts 2.0 mu m waveband fibre optic spectral analyzers and 2.0 mu m waveband light power meters to measure.
The online Polarization Controller 4 of manual compression formula is used for adjusting polarization state in the laser annular chamber, to improve the power of output optical fibre laser.
F-P adjustable optic fibre etalon 5 is used for selecting the oscillating laser wavelength in the laser annular chamber, and is used for tuning output optical maser wavelength.
Fig. 1 is Tm
3+Simplification level structure sketch map.Adopt thulium doped fiber to do gain medium, when laser pumping source 1 passes through multimode/double clad pump combiner 2, pumping double clad thulium doped fiber 3, ground state N
0On particle absorb the 793nm pump light, transit to high level N
3, because Tm
3+The cross-relaxation process that interionic exists, N
1, N
0→ N
3, N
3The cross-relaxation process cause particle accumulation at excitation state N
1, N
0Population increase, form population inversion and distribute, a large amount of excitation state N
1The downward transition of particle return ground state N
0The time, can the spontaneous radiation wavelength be the photon of 2.0 mu m wavebands.When the 793nm continuous laser of laser pumping source 1 emission during through the continuous pumping of multimode/2 pairs of double clad thulium doped fibers of double clad pump combiner 3, this spontaneous radiation is recurred, so at excitation state N
1With ground state N
0Between produce 2.0 continuous mu m waveband light radiation.
Fig. 3 is a wideband adjustable output optical fibre laser spectrogram.793nm laser pumping source 1 is through multimode/double clad pump combiner 2, pumping double clad thulium doped fiber 3; Produce 2.0 mu m wavebands gain broadband light; Utilize polarization state in the online Polarization Controller 4 adjustment laser annular chambers of manual compression formula, 90% Ausgang of 2.0 mu m waveband fiber couplers 6 is realized the amplification of light as positive feedback; Utilize F-P adjustable optic fibre etalon 5 tuning 2.0 mu m waveband laser signal wavelengths, can realize the 70nm wide-band tuning.
Those of ordinary skill in the art will be appreciated that; Above embodiment is used for explaining the utility model; And be not as the qualification to the utility model, as long as in the scope of the utility model, to the variation of above embodiment, the protection range that modification all will drop on the utility model.
Claims (4)
1. the complete tunable thulium-doped laser of fiber broadband; It is characterized in that comprising 793nm laser pumping source (1), multimode/double clad pump combiner (2), double clad thulium doped fiber (3), online Polarization Controller (4), F-P adjustable optic fibre etalon (5), 2.0 mu m waveband wide-band couplers (6), 2.0 mu m waveband isolators (7); 793nm laser pumping source (1) is connected with the first input end mouth (a) of multimode/double clad pump combiner (2), and second port (c) of multimode/double clad pump combiner (2) is connected with an end of double clad thulium doped fiber (3); The 3rd port (b) of multimode/double clad pump combiner (2) is connected with an end of F-P adjustable optic fibre etalon (5); Online Polarization Controller (4) sandwiches the part optical fiber between multimode/double clad pump combiner (2) and the F-P adjustable optic fibre etalon (5) in it and does not block optical fiber; The other end of F-P adjustable optic fibre etalon (5) is connected with the input (d) of 2.0 mu m waveband fiber couplers (6); 2.0 first output (e) of mu m waveband fiber coupler (6) is as laser output, the optical-fiber laser signal wavelength of output is the tunable wave band of 2.0 μ m; 2.0 second output (f) of mu m waveband fiber coupler (6) is connected with the input of 2.0 mu m waveband isolators (7) as feedback; 2.0 the output of mu m waveband isolator (7) is connected with the other end of double clad thulium doped fiber (3); The annular chamber that described 793nm laser pumping source (1), multimode/double clad pump combiner (2), F-P adjustable optic fibre etalon (5), 2.0 mu m waveband fiber couplers (6), 2.0 mu m waveband fibre optic isolaters (7) and double clad thulium doped fiber (3) are connected to form adopts all optical fibre structure, and fused fiber splice is all adopted in above-mentioned connection.
2. the tunable thulium-doped laser of full fiber broadband as claimed in claim 1 is characterized in that: first output (e) of said 2.0 mu m waveband fiber couplers (6) is 10% output, and second output (f) is 90% output.
3. the tunable thulium-doped laser of full fiber broadband as claimed in claim 1 is characterized in that: the maximum spectrum tuning range of 2.0 mu m waveband optical-fiber laser signals of said output is 1940-2010nm, and spectral bandwidth is 70nm.
4. the tunable thulium-doped laser of full fiber broadband as claimed in claim 1 is characterized in that: described online Polarization Controller (4) adopts the manual compression formula.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204630505U CN202333430U (en) | 2011-11-18 | 2011-11-18 | All-fibre thulium-doped laser with tunable broadband |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204630505U CN202333430U (en) | 2011-11-18 | 2011-11-18 | All-fibre thulium-doped laser with tunable broadband |
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| Publication Number | Publication Date |
|---|---|
| CN202333430U true CN202333430U (en) | 2012-07-11 |
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|---|---|---|---|
| CN2011204630505U Expired - Fee Related CN202333430U (en) | 2011-11-18 | 2011-11-18 | All-fibre thulium-doped laser with tunable broadband |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105633772A (en) * | 2016-02-19 | 2016-06-01 | 张巍巍 | Chiral fiber grating-based all-fiber mode-locked fiber laser |
-
2011
- 2011-11-18 CN CN2011204630505U patent/CN202333430U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105633772A (en) * | 2016-02-19 | 2016-06-01 | 张巍巍 | Chiral fiber grating-based all-fiber mode-locked fiber laser |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20141118 |
|
| EXPY | Termination of patent right or utility model |