CN204243444U - A kind of short bore configurations single-frequency 930 nm linear polarization full-optical-fiber laser - Google Patents
A kind of short bore configurations single-frequency 930 nm linear polarization full-optical-fiber laser Download PDFInfo
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- CN204243444U CN204243444U CN201420684685.1U CN201420684685U CN204243444U CN 204243444 U CN204243444 U CN 204243444U CN 201420684685 U CN201420684685 U CN 201420684685U CN 204243444 U CN204243444 U CN 204243444U
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Abstract
The utility model discloses a kind of short bore configurations single-frequency 930nm linear polarization full-optical-fiber laser based on distributed Prague optical fiber grating, it is characterized in that the output of semiconductor pump laser is connected with the pumping input of optical fibre wavelength division multiplexer, the signal input part fiber end face of optical fibre wavelength division multiplexer is cut sth. askew, optical fibre wavelength division multiplexer signal output part is connected with the anti-fiber grating of height, the other end of high anti-fiber grating is connected with neodymium-doped fiber, the neodymium-doped fiber other end is connected with low anti-fiber grating, the low anti-fiber grating other end is connected with output optical fibre, the end face of the output optical fibre other end is cut sth. askew as degree angle, the utility model achieves a kind of method obtaining 930nm linear polarization single frequency fiber laser, laser structure is simple, achieve all-fiber welding and all-fiber, stable work in work, Maintenance free, it is in sensing, laser spectroscopy, front line science research, all there is important using value in the fields such as biomedical imaging.
Description
Technical field
The utility model relates to a kind of near-infrared single frequency laser, and especially a kind of short bore configurations single-frequency 930 nm linear polarization full-optical-fiber laser based on distributed Prague optical fiber grating, belongs to optical fiber and laser technology field.
Background technology
Fiber laser take optical fiber as the laser of gain media, and wherein most widely used gain fibre is rare-earth doped optical fibre.And by using the gain fibre of the different rare earth element of doping, the operation wavelength of fiber laser can cover from ultraviolet to infrared broad range.Because fiber laser has simple and compact for structure, avoid safeguarding, low energy consumption, high conversion efficiency, high stability, the distinct advantage such as high light beam quality, so it is in communication, medical science, military, the aspects such as materials processing have a wide range of applications.And single frequency optical fiber laser is except the above-mentioned advantage with fiber laser, also have coherence length long in addition, the advantages such as monochromaticjty is good, and breadth of spectrum line is narrow, the fields such as these features make it be widely used in photodetection, laser spectroscopy, nonlinear optics.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, there is provided a kind of and there is shorter operation wavelength, larger photon energy, the ablation threshold of laser processing can be reduced, obtain a kind of short bore configurations single-frequency 930 nm linear polarization full-optical-fiber laser based on distributed Prague optical fiber grating of single-frequency blue-green laser source.
The utility model is realized by the following technical programs.
A kind of short bore configurations single-frequency 930 nm linear polarization full-optical-fiber laser based on distributed Prague optical fiber grating, it is characterized in that the output of semiconductor pump laser 1 is connected with the pumping input of optical fibre wavelength division multiplexer 2, the signal input part fiber end face of optical fibre wavelength division multiplexer 2 is cut sth. askew, optical fibre wavelength division multiplexer 2 signal output part is connected with the anti-fiber grating 3 of height, the other end of high anti-fiber grating 3 is connected with neodymium-doped fiber 4, neodymium-doped fiber 4 other end is connected with low anti-fiber grating 5, low anti-fiber grating 5 other end is connected with output optical fibre, the end face of the output optical fibre other end is cut sth. askew.
Described semiconductor pump laser 1 is the single mode semiconductor laser of band tail optical fiber, and operation wavelength is 808 nm.
Described optical fibre wavelength division multiplexer 2 is 808/930 nm optical fibre wavelength division multiplexer.
The anti-fiber grating of described height is write and is formed on non PM fiber, and reflection peak centre wavelength is 930nm, and reflectivity is greater than 99%, and three dB bandwidth is 0.3nm, and high anti-fiber grating is high anti-Fiber Bragg Grating FBG.
Described low anti-fiber grating is write and is formed on polarization maintaining optical fibre, reflectance spectrum has two reflection peaks to correspond respectively to two kinds of polarization modes, and centre wavelength is in 930nm respectively, 930.2nm, only have a reflection peak to mate with the anti-optic fiber grating wavelength of height, ensure that the linear polarization output characteristic of laser; Optical grating reflection peak three dB bandwidth is less than 0.05nm, and reflectivity is less than 90%.
Described neodymium-doped fiber is polarization maintaining optical fibre, and length is no longer than 2cm;
Described a kind of short bore configurations single-frequency 930 nm linear polarization full-optical-fiber laser based on distributed Prague optical fiber grating, Output of laser is single-frequency (single longitudinal mode) laser, the output of single-frequency laser realizes by controlling laser cavity chamber reflectance spectrum bandwidth that is long and fiber grating, and laser cavity chamber is long: L=L1+L2+L3; Wherein L is that laser cavity chamber is long, L1 is gain fibre, L2 is high reflective grid tail optical fiber, L3 is low reflective grid tail optical fiber.Gain fibre length is reduced by using highly doped neodymium-doped fiber, reduce grating tail optical fiber length simultaneously, control as far as possible short (being less than 3cm) by long for laser cavity chamber, thus each longitudinal mode spacing in increase chamber, the fine grating (three dB bandwidth is less than 0.05nm) of low light reflectivity simultaneously using reflectance spectrum bandwidth narrower, use this kind of method, can ensure that laser single longitudinal mode (single-frequency) exports.
Described output optical fibre is polarization maintaining optical fibre, and output has carried out 8 degree of angle cuttings, suppresses self-oscillatory flashlight end face reflection.
The utility model achieves a kind of method obtaining 930nm linear polarization single frequency fiber laser, laser structure is simple, achieve all-fiber welding and all-fiber, stable work in work, Maintenance free, it is in sensing, laser spectroscopy, front line science research, all there is important using value in the fields such as biomedical imaging.
Accompanying drawing explanation
Fig. 1 is structure chart of the present utility model.
Mark in figure: 808 nm semiconductor pump laser 1,808/930 nm optical fibre wavelength division multiplexers 2, high reflectance Fiber Bragg Grating FBG 3, neodymium-doped fiber 4, antiradar reflectivity Fiber Bragg Grating FBG 5, and output optical fibre 6.
Embodiment
Below in conjunction with accompanying drawing, the utility model will be further described:
As shown in Figure 1, a kind of short bore configurations single-frequency 930 nm linear polarization full-optical-fiber laser based on distributed Prague optical fiber grating, comprise: 808 nm semiconductor pump lasers 1, its output is connected with the pumping input of 808/930 nm optical fibre wavelength division multiplexer 2, the signal input part fiber end face of wavelength division multiplexer 2 is cut sth. askew, signal output part is connected with the anti-fiber grating 3 of height, the other end of high anti-fiber grating 3 is connected with neodymium-doped fiber 4, neodymium-doped fiber 4 other end is connected with low anti-fiber grating 5, low anti-fiber grating 5 other end is connected with output optical fibre, it is 8 degree of angles that the end face of the output optical fibre other end is cut sth. askew, 808 described nm semiconductor pump lasers 1 are the single mode semiconductor laser of band tail optical fiber, operation wavelength is 808 nm, the anti-Fiber Bragg Grating FBG of described height is write and is formed on non PM fiber, and reflection peak centre wavelength is 930nm, and reflectivity is greater than 99%, and three dB bandwidth is 0.3nm, described low anti-Fiber Bragg Grating FBG is write and is formed on polarization maintaining optical fibre, reflectance spectrum has two reflection peaks to correspond respectively to two kinds of polarization modes, centre wavelength is in 930nm respectively, 930.2nm, therefore only have a reflection peak to mate with the anti-optic fiber grating wavelength of height, ensure that the linear polarization output characteristic of laser, optical grating reflection peak three dB bandwidth is less than 0.05nm, and reflectivity is less than 90%, described neodymium-doped fiber is polarization maintaining optical fibre, and length is no longer than 2cm, described a kind of short bore configurations single-frequency 930 nm linear polarization full-optical-fiber laser based on distributed Prague optical fiber grating, Output of laser is single-frequency (single longitudinal mode) laser, and the output of single-frequency laser realizes by controlling laser cavity chamber reflectance spectrum bandwidth that is long and fiber grating.Laser cavity chamber is long: L=L1+L2+L3; Wherein L is that laser cavity chamber is long, L1 is gain fibre, L2 is high reflective grid tail optical fiber, L3 is low reflective grid tail optical fiber.Gain fibre length is reduced by using highly doped neodymium-doped fiber, reduce grating tail optical fiber length simultaneously, control as far as possible short (being less than 3cm) by long for laser cavity chamber, thus each longitudinal mode spacing in increase chamber, the fine grating (three dB bandwidth is less than 0.05nm) of low light reflectivity simultaneously using reflectance spectrum bandwidth narrower, use this kind of method, can ensure that laser single longitudinal mode (single-frequency) exports; Described output optical fibre is polarization maintaining optical fibre, output has carried out 8 degree of angle cuttings, and suppress self-oscillatory flashlight end face reflection, the utility model achieves a kind of method obtaining 930nm linear polarization single frequency fiber laser, laser structure is simple, achieve all-fiber welding and all-fiber, stable work in work, Maintenance free, it is in sensing, laser spectroscopy, front line science research, all there is important using value in the fields such as biomedical imaging.
Claims (8)
1. a short bore configurations single-frequency 930 nm linear polarization full-optical-fiber laser, it is characterized in that the output of semiconductor pump laser is connected with the pumping input of optical fibre wavelength division multiplexer, the signal input part fiber end face of optical fibre wavelength division multiplexer is cut sth. askew, optical fibre wavelength division multiplexer signal output part is connected with the anti-fiber grating of height, the other end of high anti-fiber grating is connected with neodymium-doped fiber, the neodymium-doped fiber other end is connected with low anti-fiber grating, the low anti-fiber grating other end is connected with output optical fibre, and the end face of the output optical fibre other end is cut sth. askew as degree angle.
2. a kind of short bore configurations single-frequency 930 nm linear polarization full-optical-fiber laser according to claim 1, it is characterized in that described semiconductor pump laser is the single mode semiconductor laser of band tail optical fiber, operation wavelength is 808 nm.
3. a kind of short bore configurations single-frequency 930 nm linear polarization full-optical-fiber laser according to claim 1, is characterized in that optical fibre wavelength division multiplexer is 808/930 nm optical fibre wavelength division multiplexer.
4. a kind of short bore configurations single-frequency 930 nm linear polarization full-optical-fiber laser according to claim 1, it is characterized in that the anti-Fiber Bragg Grating FBG of described height is write is formed on non PM fiber, reflection peak centre wavelength is 930nm, and reflectivity is greater than 99%, and three dB bandwidth is 0.3nm.
5. a kind of short bore configurations single-frequency 930 nm linear polarization full-optical-fiber laser according to claim 1, it is characterized in that described low anti-Fiber Bragg Grating FBG is write is formed on polarization maintaining optical fibre, reflectance spectrum has two reflection peaks to correspond respectively to two kinds of polarization modes, centre wavelength is in 930nm respectively, 930.2nm, therefore only have a reflection peak to mate with the anti-optic fiber grating wavelength of height, ensure that the linear polarization output characteristic of laser; Optical grating reflection peak three dB bandwidth is less than 0.05nm, and reflectivity is less than 90%.
6. a kind of short bore configurations single-frequency 930 nm linear polarization full-optical-fiber laser according to claim 1, it is characterized in that described neodymium-doped fiber is polarization maintaining optical fibre, length is no longer than 2cm.
7. a kind of short bore configurations single-frequency 930 nm linear polarization full-optical-fiber laser according to claim 1, it is characterized in that Output of laser is single-frequency laser, the output of single-frequency laser realizes by controlling laser cavity chamber reflectance spectrum bandwidth that is long and fiber grating, and laser cavity chamber is long: L=L1+L2+L3; Wherein L is that laser cavity chamber is long, L1 is gain fibre, L2 is high reflective grid tail optical fiber, L3 is low reflective grid tail optical fiber.
8. a kind of short bore configurations single-frequency 930 nm linear polarization full-optical-fiber laser according to claim 1, is characterized in that output optical fibre is polarization maintaining optical fibre, and output has carried out 8 degree of angles cuttings, suppresses self-oscillatory flashlight end face reflection.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332812A (en) * | 2014-11-17 | 2015-02-04 | 山东海富光子科技股份有限公司 | Single-frequency 930 nm linear polarization all-fiber laser with short-cavity structure |
| CN106356705A (en) * | 2016-10-31 | 2017-01-25 | 西南交通大学 | D-shaped fiber-based cross-polarization beat laser and sensor |
| CN110797737A (en) * | 2019-10-31 | 2020-02-14 | 西安交通大学 | Short straight cavity single-polarization single-longitudinal mode optical fiber laser and preparation method thereof |
-
2014
- 2014-11-17 CN CN201420684685.1U patent/CN204243444U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332812A (en) * | 2014-11-17 | 2015-02-04 | 山东海富光子科技股份有限公司 | Single-frequency 930 nm linear polarization all-fiber laser with short-cavity structure |
| CN106356705A (en) * | 2016-10-31 | 2017-01-25 | 西南交通大学 | D-shaped fiber-based cross-polarization beat laser and sensor |
| CN110797737A (en) * | 2019-10-31 | 2020-02-14 | 西安交通大学 | Short straight cavity single-polarization single-longitudinal mode optical fiber laser and preparation method thereof |
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Denomination of utility model: Single-frequency 930 nm linear polarization all-fiber laser with short-cavity structure Effective date of registration: 20151016 Granted publication date: 20150401 Pledgee: Weihai commercial bank Limited by Share Ltd Pledgor: Shandong Haifu Photon Technology Co., Ltd. Registration number: 2015990000870 |
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Date of cancellation: 20171107 Granted publication date: 20150401 Pledgee: Weihai commercial bank Limited by Share Ltd Pledgor: Shandong Haifu Photon Technology Co., Ltd. Registration number: 2015990000870 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
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Denomination of utility model: Single-frequency 930 nm linear polarization all-fiber laser with short-cavity structure Effective date of registration: 20171107 Granted publication date: 20150401 Pledgee: Weihai City Commercial Bank Limited by Share Ltd high tech branch Pledgor: Shandong Haifu Photon Technology Co., Ltd. Registration number: 2017990001036 |
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Date of cancellation: 20211014 Granted publication date: 20150401 Pledgee: Weihai City Commercial Bank Limited by Share Ltd. high tech branch Pledgor: HFB Photonics Co.,Ltd. Registration number: 2017990001036 |
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