CN103107478A - Dual-wavelength fiber laser with tunable power ratios - Google Patents
Dual-wavelength fiber laser with tunable power ratios Download PDFInfo
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- CN103107478A CN103107478A CN201310033781XA CN201310033781A CN103107478A CN 103107478 A CN103107478 A CN 103107478A CN 201310033781X A CN201310033781X A CN 201310033781XA CN 201310033781 A CN201310033781 A CN 201310033781A CN 103107478 A CN103107478 A CN 103107478A
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Abstract
The invention provides a dual-wavelength fiber laser with tunable power ratios. The dual-wavelength fiber laser with the tunable power ratios comprises a laser pump source, a wavelength division multiplexer, two groups of fiber bragg grating pairs, and a device winded by active optical fiber and optical fiber. The dual-wavelength fiber laser with the tunable power ratios can realize dual-wavelength laser output and dual-wavelength laser power tunable output. The dual-wavelength fiber laser with the tunable power ratios has the advantages of being simple in structure, convenient to operate, low in cost, strong in practical applicability and the like, and can be applied to a plurality of fields.
Description
Technical field
The invention belongs to the fiber laser field, be specifically related to the tunable dual wavelength fibre laser of a kind of power ratio based on Fiber Bragg Grating FBG.
Technical background
Dual laser has a wide range of applications in fields such as Fibre Optical Sensor, optical device test, light wavelength-multiplexing systems, THz wave generations.But, as traditional fiber laser, be difficult to realize the conversion between single wavelength and dual wavelength.Even dual laser, also be difficult to realize that the power ratio of two wavelength is tunable.The difference that wavelength is differed to the laser gain of 3 ~ 5nm due to Active Optical Fiber is difficult to ignore, and often is difficult to realize the suitable laser generation of two wavelength power in chamber altogether at a linear, has greatly limited it and can be applicable to the generation of THz wave.Common method be by a plurality of fiber laser wavelength division multiplexing be coupled, although it can realize dual wavelength output needing a plurality of pumpings and laser cavity etc., device is complicated, cost is higher.
Summary of the invention
The object of the present invention is to provide the tunable dual wavelength fibre laser of a kind of power ratio based on Fiber Bragg Grating FBG, this laser can be realized dual-wavelength laser output and the tunable output of dual-wavelength laser power ratio, have simple in structure, easy to operate, cost is low and the advantage such as practical, can be applicable to a plurality of fields.
Concrete technical solution of the present invention is as follows:
The tunable dual wavelength fibre laser of a kind of power ratio is characterized in that: this laser is comprised of pump laser, wavelength division multiplexer, line chamber; Described line chamber is arranged in order and is formed by the low anti-end of the low anti-end of the Gao Fanduan of the Gao Fanduan of the first Fiber Bragg Grating FBG, Optical Fiber Winding device, the second Fiber Bragg Grating FBG, Active Optical Fiber, the second Fiber Bragg Grating FBG, the first Fiber Bragg Grating FBG, and it is λ that the grating pair of the low anti-end of the Gao Fanduan of described the first Fiber Bragg Grating FBG and the first Fiber Bragg Grating FBG forms wavelength
1the first laser cavity, it is λ that the grating pair of the low anti-end of the Gao Fanduan of described the second Fiber Bragg Grating FBG and the second Fiber Bragg Grating FBG forms wavelength
2the second laser cavity, described wavelength division multiplexer has three ports, the first port is connected with the output of described pump laser, and the second port is connected with the low anti-end of the first Fiber Bragg Grating FBG of described line chamber, and the 3rd port is as the output of laser; Described Optical Fiber Winding device consists of T-shaped column, turning arm and base, the lower end of described T-shaped column is fixed on described base, the snare that described turning arm has an internal thread is located on the external screw thread of lower end of described T-shaped column, monomode fiber between the Gao Fanduan of described the first Fiber Bragg Grating FBG and the second Fiber Bragg Grating FBG Gao Fanduan is wrapped on described T-shaped column, one end of this monomode fiber is fixed on the transverse arm of described T-shaped column, and the other end is fixed on the arm of described turning arm; Described turning arm rotates around T-shaped column, by the anglec of rotation of turning arm, regulates the winding degree of described monomode fiber on T-shaped column, with the chamber of tuning described the first laser cavity, damages, and realizes the long controlled and dual wavelength power ratio adjusting of single-double wave.
The starting of oscillation wavelength X of described the first laser cavity and the second laser cavity
1, λ
2differ 3 ~ 5nm, and in the gain bandwidth of described Active Optical Fiber.
The reflectivity of described the first Fiber Bragg Grating FBG Gao Fanduan, the second Fiber Bragg Grating FBG Gao Fanduan is identical and higher than 90%, the reflectivity that the reflectivity of the low anti-end of the second Fiber Bragg Grating FBG is the low anti-end of the 5% ~ 10%, first Fiber Bragg Grating FBG is 7% ~ 12%.
The doping of described Active Optical Fiber is that Er or Yb or Er, Yb mix altogether.
Described Active Optical Fiber is polarization maintaining optical fibre or non PM fiber.
Described pump laser be 980nm semiconductor laser, 1480nm semiconductor laser or with the corresponding laser of Active Optical Fiber wavelength.
The wavelength of described wavelength division multiplexer and described pump laser wavelength adapt.
The about 8mm of described T-shaped column upper end diameter.
Operation principle of the present invention is as follows:
One section of monomode fiber between the Gao Fanduan of the Gao Fanduan of the first Fiber Bragg Grating FBG and the second Fiber Bragg Grating FBG is fixed on the transverse arm of T-shaped column, and another section is fixed on the arm of turning arm; T-shaped column lower end has screw thread, can make turning arm rotate around it, by adjusting the turning arm anglec of rotation, regulates the winding degree of optical fiber on T-shaped column, i.e. winding radius and the length of optical fiber, with a tuning λ
1the chamber of laser cavity damage, thereby realize that the long controlled and dual wavelength power ratio of single-double wave can regulate.
Utilize two groups of Fiber Bragg Grating FBGs to as the wavelength selector part, realized the dual wavelength output λ of laser
1, λ
2, then make wherein one group of wavelength X by winding radius and the length that the Optical Fiber Winding device of a particular design is adjusted optical fiber
1laser chamber damage tunable, thereby reach the long controlled and adjustable purpose of power ratio of single-double wave.
Between the transverse arm of T-shaped column and turning arm, hour, the winding degree of optical fiber on T-shaped column is less, now first wavelength X for the angle of cross winding
1the chamber of laser damage less than normally, laser is output as λ
1single wavelength output.
Regulate turning arm, when the angle of cross winding between the transverse arm of T-shaped column and turning arm is larger, the winding degree of optical fiber on T-shaped column is larger, now λ
1, λ
2laser chamber damage quite, laser is output as dual wavelength output, and can realize the dual wavelength output that power ratio is adjustable.
When the angle of cross winding between the transverse arm of T-shaped column and turning arm is very large, the winding degree of optical fiber on T-shaped column is very large, now λ
1loss ratio λ
2loss much bigger, laser is output as λ
2single wavelength output.
Technique effect of the present invention is as follows:
The present invention utilizes two groups of Fiber Bragg Grating FBGs to as the wavelength selector part, has realized the dual wavelength output λ of laser
1, λ
2, then make wherein one group of wavelength X by winding radius and the length that an Optical Fiber Winding device is adjusted optical fiber
1the chamber of laser cavity damage tunable, thereby reach the long controlled and adjustable purpose of power ratio of single-double wave.
That the present invention has is simple in structure, easy to operate, cost is low and the advantage such as practical, can be applicable to a plurality of fields.
The accompanying drawing explanation
The structural representation that Fig. 1 is the tunable dual wavelength fibre laser of power ratio of the present invention.
The structure chart that Fig. 2 is Optical Fiber Winding device in the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described further, but should not limit the scope of the invention with this.
Refer to Fig. 1 and Fig. 2, the structural representation that Fig. 1 is the tunable dual wavelength fibre laser of power ratio of the present invention, the structure chart that Fig. 2 is Optical Fiber Winding device in the present invention.As seen from the figure, the tunable dual wavelength fibre laser of power ratio of the present invention is characterized in that: this laser is comprised of pump laser 1, wavelength division multiplexer 2, line chamber 3, described line chamber is arranged in order and is formed by the low anti-end 4L of the low anti-end 6L of the anti-6H of end of height of the anti-4H of end of the height of the first Fiber Bragg Grating FBG, Optical Fiber Winding device 5, the second Fiber Bragg Grating FBG, Active Optical Fiber 7, the second Fiber Bragg Grating FBG, the first Fiber Bragg Grating FBG, and it is λ that the grating pair of the low anti-end 4L of the anti-4H of end of the height of described the first Fiber Bragg Grating FBG and the first Fiber Bragg Grating FBG forms wavelength
1the first laser cavity, it is λ that the grating pair of the low anti-end 6L of the anti-6H of end of the height of described the second Fiber Bragg Grating FBG and the second Fiber Bragg Grating FBG forms wavelength
2the second laser cavity, the first port a of described wavelength division multiplexer 2 is connected with the output of described pump laser 1, the second port b is connected with the low anti-end 4L of the first Fiber Bragg Grating FBG of described line chamber, the 3rd port c is as the output of laser, described Optical Fiber Winding device 5 is by T-shaped column 8, turning arm 9 and base 10 form, the lower end of described T-shaped column 8 is fixed on described base 10, the snare that described turning arm 9 has internal thread is located on the external screw thread of lower end of described T-shaped column 8, monomode fiber 11 between the high anti-end 6H of the anti-4H of end of the height of described the first Fiber Bragg Grating FBG and the second Fiber Bragg Grating FBG is wrapped in the upper end of described T-shaped column 8, one end of this monomode fiber 11 is fixed on the transverse arm of described T-shaped column 8, the other end is fixed on the arm of described turning arm 9, described turning arm 9, around T-shaped column 8 rotations, is regulated the winding degree of described monomode fiber 11 on T-shaped column 8 by the anglec of rotation of turning arm 9, with the chamber of tuning described the first laser cavity, damages, and realizes the long controlled and dual wavelength power ratio adjusting of single-double wave.
The starting of oscillation wavelength X of described the first laser cavity and the second laser cavity
1, λ
2differ 3 ~ 5nm, and in the gain bandwidth of described Active Optical Fiber.
The reflectivity of the high anti-end of described the first Fiber Bragg Grating FBG 4H, the high anti-end 6H of the second Fiber Bragg Grating FBG is identical and higher than 90%, the reflectivity that the reflectivity of the low anti-end 6L of the second Fiber Bragg Grating FBG is the low anti-end 4L of the 5% ~ 10%, first Fiber Bragg Grating FBG is 7% ~ 12%.
The doping of described Active Optical Fiber 7 is that Er or Yb or Er, Yb mix altogether.
Described Active Optical Fiber 7 is polarization maintaining optical fibre or non PM fiber.
Described pump laser 1 be 980nm semiconductor laser, 1480nm semiconductor laser or with the corresponding laser of Active Optical Fiber 7 wavelength.
The wavelength of described wavelength division multiplexer 2 and described pump laser 1 wavelength adapt.
The diameter of described T-shaped column 8 upper ends is 8mm.
Below lift a specific embodiment:
Select the 976nm semiconductor laser as pumping source 1, pump light is coupled into line chamber 3 by wavelength division multiplexer 2; It is λ that the Fiber Bragg Grating FBG of first wavelength is selected wavelength to the anti-4H of end of height, low anti-end 4L
1=1035nm, reflectivity is respectively 99% and 9.5%; Second wavelength X
2the selection wavelength of the right anti-6H of end of height of Fiber Bragg Grating FBG, low anti-end 6L is λ
2=1030nm, reflectivity is respectively 99% and 8.5%; The high anti-end of the first Fiber Bragg Grating FBG 4H, Optical Fiber Winding device 5, the high anti-end 6H of the second Fiber Bragg Grating FBG, Active Optical Fiber 7, the low anti-end 6L of the second Fiber Bragg Grating FBG, first the low anti-end 4L of Fiber Bragg Grating FBG are arranged in order and form line chamber 3; Wherein Active Optical Fiber 5 is the Yb-doped fiber that one section 2.5m, core diameter are 6/125 μ m; In the middle of the high anti-end 6H of the high anti-end 4H of the first Fiber Bragg Grating FBG and the second Fiber Bragg Grating FBG, one section optical fiber is wound around with optical fiber wind 5.
Between turning arm 9 and T-shaped column 8 transverse arms, the angle of cross winding hour, the winding degree of optical fiber on Optical Fiber Winding column 8 is less, now because Yb optical fiber is larger to the emission cross section of 1035nm, and the low anti-end luminance factor 1030nm of 1035nm wants high, make the chamber damage of 1035nm wavelength laser less than normal, laser is output as the mono-wavelength output of 1035nm.
Regulate turning arm 9, when the angle of cross winding between turning arm 9 and T-shaped column 8 transverse arms is larger, the winding degree of optical fiber 11 on Optical Fiber Winding column 8 is larger, now the chamber of 1035nm laser is damaged with the chamber of 1030nm laser and is damaged quite, laser is output as 1030nm and the output of 1035nm dual wavelength, control the winding degree of optical fiber 11 on Optical Fiber Winding column 8, can realize the dual wavelength output that power ratio is adjustable.
When the angle of cross winding between two arms is very large, the winding degree of optical fiber 11 on Optical Fiber Winding column 8 is very large, and now the chamber of 1035nm laser is damaged and damaged much biggerly than the chamber of 1030nm laser, and laser is output as the mono-wavelength of 1030nm and exports.
Experiment shows, the present invention utilizes two groups of Fiber Bragg Grating FBGs to as the wavelength selector part, has realized the long controlled and adjustable purpose of power ratio of single-double wave of the output of laser.That the present invention has is simple in structure, easy to operate, cost is low and the advantage such as practical, can be applicable to a plurality of fields.
Claims (8)
1. the tunable dual wavelength fibre laser of power ratio, it is characterized in that: this laser is comprised of pump laser (1), wavelength division multiplexer (2), line chamber (3), described line chamber is arranged in order and is formed by the low anti-end (4L) of the low anti-end (6L) of the Gao Fanduan (6H) of the Gao Fanduan (4H) of the first Fiber Bragg Grating FBG, Optical Fiber Winding device (5), the second Fiber Bragg Grating FBG, Active Optical Fiber (7), the second Fiber Bragg Grating FBG, the first Fiber Bragg Grating FBG, and the grating pair formation wavelength of the low anti-end (4L) of the Gao Fanduan of described the first Fiber Bragg Grating FBG (4H) and the first Fiber Bragg Grating FBG is λ
1the first laser cavity, it is λ that the grating pair of the low anti-end (6L) of the Gao Fanduan of described the second Fiber Bragg Grating FBG (6H) and the second Fiber Bragg Grating FBG forms wavelength
2the second laser cavity, first port (a) of described wavelength division multiplexer (2) is connected with the output of described pump laser (1), the second port (b) is connected with the low anti-end (4L) of the first Fiber Bragg Grating FBG of described line chamber, the 3rd port (c) is as the output of laser, described Optical Fiber Winding device (5) is by T-shaped column (8), turning arm (9) and base (10) form, the lower end of described T-shaped column (8) is fixed on described base (10), the snare that described turning arm (9) has an internal thread is located on the external screw thread of lower end of described T-shaped column (8), monomode fiber (11) between the Gao Fanduan of described the first Fiber Bragg Grating FBG (4H) and the second Fiber Bragg Grating FBG Gao Fanduan (6H) is wrapped in described T-shaped column (8) upper end, one end of this monomode fiber (11) is fixed on the transverse arm of described T-shaped column (8), the other end is fixed on the arm of described turning arm (9), described turning arm (9) rotates around T-shaped column (8), regulate the winding degree of described monomode fiber (11) on T-shaped column (8) by the anglec of rotation of turning arm (9), damage in chamber with tuning described the first laser cavity, realizes the long controlled and dual wavelength power ratio adjusting of single-double wave.
2. the tunable dual wavelength fibre laser of power ratio according to claim 1, is characterized in that the starting of oscillation wavelength X of described the first laser cavity and the second laser cavity
1, λ
2differ 3 ~ 5nm, and in the gain bandwidth of described Active Optical Fiber.
3. the tunable dual wavelength fibre laser of power ratio according to claim 1, it is characterized in that the reflectivity of described the first Fiber Bragg Grating FBG Gao Fanduan (4H), the second Fiber Bragg Grating FBG Gao Fanduan (6H) is identical and higher than 90%, the reflectivity that the reflectivity of the low anti-end of the second Fiber Bragg Grating FBG (6L) is the low anti-end of the 5% ~ 10%, first Fiber Bragg Grating FBG (4L) is 7% ~ 12%.
4. the tunable dual wavelength fibre laser of power ratio according to claim 1, the doping that it is characterized in that described Active Optical Fiber (7) is that Er or Yb or Er, Yb mix altogether.
5. according to the tunable dual wavelength fibre laser of the described power ratio of claim 1 or 4, it is characterized in that described Active Optical Fiber (7) is polarization maintaining optical fibre or non PM fiber.
6. the tunable dual wavelength fibre laser of power ratio according to claim 1, it is characterized in that described pump laser (1) be 980nm semiconductor laser, 1480nm semiconductor laser or with the corresponding laser of Active Optical Fiber (7) wavelength.
7. the tunable dual wavelength fibre laser of power ratio according to claim 1, is characterized in that the wavelength of described wavelength division multiplexer (2) and described pump laser (1) wavelength adapt.
8. according to the tunable dual wavelength fibre laser of the described power ratio of claim 1 to 7 any one, it is characterized in that the diameter of described T-shaped column (8) upper end is 8mm.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308985A (en) * | 2013-06-17 | 2013-09-18 | 上海理工大学 | Terahertz dual-wavelength division multiplexing/demultiplexing device |
| CN106169689A (en) * | 2016-08-25 | 2016-11-30 | 天津大学 | Auxiliary chamber pumping erbium-ytterbium co-doped fiber laser instrument |
| CN106299986A (en) * | 2016-10-31 | 2017-01-04 | 电子科技大学 | A kind of all-fiber wavelength passive Q-adjusted mid-infrared fiber laser of optional dual wavelength |
| US10746532B2 (en) | 2017-08-01 | 2020-08-18 | Dr. Johannes Heidenhain Gmbh | Device for interferometric distance measurement |
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| CN202395301U (en) * | 2011-12-15 | 2012-08-22 | 杭州电子科技大学 | Adjustable dual-wavelength fiber laser |
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| CN1347511A (en) * | 1999-01-25 | 2002-05-01 | 康宁股份有限公司 | Distributed resonant ring fiber filter |
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|---|---|---|---|---|
| CN103308985A (en) * | 2013-06-17 | 2013-09-18 | 上海理工大学 | Terahertz dual-wavelength division multiplexing/demultiplexing device |
| CN106169689A (en) * | 2016-08-25 | 2016-11-30 | 天津大学 | Auxiliary chamber pumping erbium-ytterbium co-doped fiber laser instrument |
| CN106299986A (en) * | 2016-10-31 | 2017-01-04 | 电子科技大学 | A kind of all-fiber wavelength passive Q-adjusted mid-infrared fiber laser of optional dual wavelength |
| CN106299986B (en) * | 2016-10-31 | 2019-05-07 | 电子科技大学 | A kind of passive Q-adjusted mid-infrared fiber laser of optional dual wavelength of all -fiber wavelength |
| US10746532B2 (en) | 2017-08-01 | 2020-08-18 | Dr. Johannes Heidenhain Gmbh | Device for interferometric distance measurement |
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Address after: 201821 room j2018, building 6, No. 1288, Yecheng Road, Jiading District, Shanghai Patentee after: Shanghai Feibo Laser Technology Co.,Ltd. Address before: Room 3092, Building 3, No. 1368 Xingxian Road, Jiading District, Shanghai, 201815 Patentee before: SHANGHAI FEIBO LASER TECHNOLOGIES Co.,Ltd. |