CN100585966C - Laser device of optical fiber with automatic protection of semiconductor pumping sources - Google Patents
Laser device of optical fiber with automatic protection of semiconductor pumping sources Download PDFInfo
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- CN100585966C CN100585966C CN200810038509A CN200810038509A CN100585966C CN 100585966 C CN100585966 C CN 100585966C CN 200810038509 A CN200810038509 A CN 200810038509A CN 200810038509 A CN200810038509 A CN 200810038509A CN 100585966 C CN100585966 C CN 100585966C
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- 238000005086 pumping Methods 0.000 title claims abstract description 93
- 239000004065 semiconductor Substances 0.000 title claims abstract description 73
- 239000013307 optical fiber Substances 0.000 title claims abstract description 60
- 239000000835 fiber Substances 0.000 claims abstract description 63
- 238000012806 monitoring device Methods 0.000 claims abstract description 19
- 238000012544 monitoring process Methods 0.000 claims abstract description 8
- 238000011081 inoculation Methods 0.000 claims description 3
- 238000003491 array Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 241000931526 Acer campestre Species 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The invention relates to a fiber laser device provided with automatic protection of semiconductor pumping sources, which is characterized by comprising a multimode pumping optical fiber combiner, a plurality of semiconductor pumping sources, a fiber laser device, a retroreflection laser power monitoring device and a driving power for semiconductor pumping sources. The multimode pumping optical fiber combiner is provided with N input multimode transmitting energy fibers and a pumping fiber, wherein, N is positive integer more than 1; the pumping fiber is connected with the input end of the fiber laser device; one of the N input multimode transmitting energy fibers is connected with the control end of the driving power of the semiconductor pumping sources by the retroreflection laser power monitoring device to judge whether the laser returned is too strong by monitoring the signal power of the returned laser of the idle pumping fiber and to automatically cut off the power supply of the semiconductor pumping sources according to the judgment so as to automatically protect the pumping source semiconductor laser. The fiber laser device of the invention has the advantages of simple structure, low cost and wide application.
Description
Technical field
The present invention relates to fiber laser device, particularly a kind of fiber laser device with automatic protection of semiconductor pumping sources.
Background technology
Has the advantage that volume is little, in light weight and pumping efficiency is high with semiconductor laser as the fiber laser of pumping source, but because the architectural characteristic of semiconductor laser self, very responsive to shining semi-conductive laser, lower powered laser radiation just can be accelerated semi-conductive ageing process greatly, causes the inefficacy in semiconductor laser pumping source.Along with laser industrial processes and target indication etc. use deep day by day, requirement to the laser average output power is also more and more higher, when high average output power shone target, the irradiated area can be returned along emitting light path by reflecting part laser, causes the damage of semiconductor pumping sources.
Protection to semiconductor pumping sources is by add the high power isolator before laser output window at present; stop that thoroughly the laser of retroeflection is realized; but this mode makes laser with high costs; particularly make the structure more complicated of laser out-feed head; volume is bigger; be difficult to realize miniaturization, lack the convenience of using.
Summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of fiber laser device with automatic protection of semiconductor pumping sources is provided, the characteristics that this device should have is simple in structure, cost is low, laser out-feed head expansibility is strong, be easy to promote the use of.
Technical solution of the present invention is as follows:
A kind of fiber laser device with automatic protection of semiconductor pumping sources; be characterized in comprising a multimode pumping optical-fiber bundling device; many semiconductor pumping sources; fiber laser device; the driving power of retroreflection laser power monitoring device and semiconductor pumping sources; described multimode pumping optical-fiber bundling device has N root input multimode energy-transmission optic fibre and a pumping optical fiber; wherein N is the positive integer greater than 1; this pumping optical fiber is connected with the input of described fiber laser device; in the described N root input multimode energy-transmission optic fibre one connects the control end of the driving power of described semiconductor pumping sources by described retroreflection laser power monitoring device, and the connected mode of other N-1 root input multimode energy-transmission optic fibre is:
When described fiber laser device was fiber laser, N-1 root input multimode energy-transmission optic fibre respectively connect a semiconductor pumping sources, and this N-1 platform semiconductor pumping sources joins with the output of the driving power of described semiconductor pumping sources again; Or
Described fiber laser device is that optical-fiber laser is when sending out device big, sub-lasing light emitter of inoculation in the N-1 root input multimode energy-transmission optic fibre, in addition N-2 root input multimode energy-transmission optic fibre respectively connects a semiconductor pumping sources, and this N-2 platform semiconductor pumping sources joins with the output of the driving power of described semiconductor pumping sources again;
The laser power that described retroreflection laser power monitoring device monitoring is returned by described fiber laser device, the laser power of returning when judgement are crossed when strong, cut off the power supply of the driving power of described semiconductor pumping sources automatically.
Described fiber laser is by constituting grow tall anti-fiber grating, Active Optical Fiber and collimation outgoing mirror of laser wave of connecting successively.
Described optical fiber laser amplifier is made of Active Optical Fiber and collimation outgoing mirror.
Described semiconductor laser pumping source is the semiconductor laser of a plurality of semiconductor laser arrays combination, or based on the semiconductor laser of a plurality of semiconductor laser diodes combinations.
Described retroreflection laser power monitoring device is a photodiode.
Characteristics of the present invention are to ensure that a control end that connects the driving power of described semiconductor pumping sources by described retroreflection laser power monitoring device is arranged in the N root input multimode energy-transmission optic fibre of described multimode pumping optical-fiber bundling device; the return laser light signal power of described this road pumping optical fiber of retroreflection laser power monitoring device monitoring; utilize photodiode that laser power signal is converted to intensity signals; when electric current surpasses predetermined value; driving power to semiconductor pumping sources sends shutdown signal; cut off the electricity supply, realize protection the optical fiber semiconductor pumping sources.
Technique effect of the present invention:
Among the present invention, avoided the use of high power isolator, greatly reduced the cost of system by the mode of monitoring retroreflection laser power.
Among the present invention, laser only needs simplify the structure and the volume of output by collimating mirror output, if particularly with output optical fibre and collimating mirror integrated after, can in very little spatial dimension, use, expanded the range of application of system.
Among the present invention, described retroeflection power monitoring device is made simple, need not carry out bigger transformation to existing system, is user-friendly to.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the structural representation of the embodiment of the invention 1.
Fig. 3 is the structural representation of the embodiment of the invention 2.
Embodiment
Be described further below in conjunction with embodiment and accompanying drawing the present invention, but should do not limit protection scope of the present invention with this.Structural representation
See also Fig. 1 earlier; Fig. 1 is a structural representation of the present invention; the fiber laser device of band automatic protection of semiconductor pumping sources of the present invention; it is characterized in that comprising a multimode pumping optical-fiber bundling device 1; many semiconductor pumping sources 201; 20 (N-1); fiber laser device 3; the driving power 5 of retroreflection laser power monitoring device 4 and semiconductor pumping sources; described multimode pumping optical-fiber bundling device 1 has N root input multimode energy-transmission optic fibre and a pumping optical fiber; wherein N is the positive integer greater than 1; this pumping optical fiber is connected with the input of described fiber laser device 3; a N in the described N root input multimode energy-transmission optic fibre connects the control end of the driving power 5 of described semiconductor pumping sources by described retroreflection laser power monitoring device 4, and the connected mode of other N-1 root input multimode energy-transmission optic fibre is:
When described fiber laser device was fiber laser, N-1 root input multimode energy-transmission optic fibre respectively connect a semiconductor pumping sources, and this N-1 platform semiconductor pumping sources joins with the output of the driving power of described semiconductor pumping sources again; Or
Described fiber laser device is that optical-fiber laser is when sending out device big, sub-lasing light emitter of inoculation in the N-1 root input multimode energy-transmission optic fibre, in addition N-2 root input multimode energy-transmission optic fibre respectively connects a semiconductor pumping sources, and this N-2 platform semiconductor pumping sources joins with the output of the driving power of described semiconductor pumping sources again;
The laser power that described retroreflection laser power monitoring device monitoring is returned by described fiber laser device, the laser power of returning when judgement are crossed when strong, cut off the power supply of the driving power of described semiconductor pumping sources automatically.
The structural representation of the embodiment of the invention 1 as shown in Figure 2, semiconductor pumping sources 201 ... the output of 20 (N-1) respectively with the input optical fibre 01,02 of N * 1 multimode pumping optical-fiber bundling device (1) ... N-1 melting welding connects, (N-1 road at most), pump light is coupled in the Active Optical Fiber 302, the population inversion of fibre core is provided, between N * 1 multimode pumping optical-fiber bundling device 1 output and Active Optical Fiber 302, welding has pair laser wave anti-fiber grating 301 that grows tall, and laser is through the 303 collimation back outputs of collimation outgoing mirror; The laser that reflects from the external world returns along light path through collimation outgoing mirror 303; during through multimode pumping optical-fiber bundling device 1; retroreflection laser can be evenly distributed in each road input optical fibre; the power that road input optical fibre in the multimode pumping optical-fiber bundling device 1 is used to monitor retroreflection laser; retroreflection laser power monitoring device 4 usefulness photosurfaces are coated with the photodiode of optical maser wavelength narrowband high transmission film are converted to intensity signals with the laser power signal of retroeflection; when current strength surpasses predetermined value; driving power 5 to semiconductor pumping sources sends shutdown signal; cut off the electricity supply, realized protection the optical fiber semiconductor pumping sources.
The structural representation of the embodiment of the invention 2 as shown in Figure 3, the laser coupled of seed source 6 output is advanced in one road input optical fibre of N * 1 multimode pumping/signal optical fibre bundling device 1, as the seed laser of Active Optical Fiber 302; Semiconductor pumping sources 201 ..., 20 (N-1) output be connected (at most N-2 road) respectively with the input optical fibre melting welding of N * 1 multimode light beam bundling device 1, pump light is coupled in the Active Optical Fiber 302, the population inversion of fibre core is provided; Laser is through the 303 collimation back outputs of collimation outgoing mirror; The power that road input optical fibre in N * 1 multimode pumping/signal optical fibre bundling device 1 is used to monitor retroreflection laser; retroreflection laser power monitoring 4 usefulness photosurfaces are coated with the photodiode of optical maser wavelength narrowband high transmission film are converted to intensity signals with the laser power signal of retroeflection; when electric current surpasses predetermined value; driving power 5 to semiconductor pumping sources sends shutdown signal; cut off the electricity supply, realized protection the optical fiber semiconductor pumping sources.
The physical parameter of specific embodiment of enumerating one in conjunction with Fig. 3 is as follows:
The flashlight of complete solid state pulse seed source 6 outputs, signal pulse repetition rate 150kHz, pulse duration 15ns, average power 2W, be coupled in one road input optical fibre of multimode pumping optical-fiber bundling device 1, this road input optical fibre is that (core diameter is 20 μ m to the quartzy energy-transmission optic fibre of D type double clad, and NA is 0.06, inner cladding is 400 μ m, and NA is 0.46); The centre wavelength 976nm of 5 semiconductor pumping sources 201,202,203,204, peak power output 25w, by energy-transmission optic fibre output (optical fiber core diameter 200 μ m, NA is 0.22), be connected one by one respectively with 4 tunnel melting welding in 5 road input optical fibres of 6 * 1 multimode pumping/optical-fiber bundling devices 1, pump light is coupled in the Active Optical Fiber 302, and described Active Optical Fiber 302 is the Yb that mixes of 14m length
3+D type double clad silica fiber (core diameter is 20 μ m, and NA is 0.06; Inner cladding is 400 μ m, and NA is 0.46; Absorption coefficient is 1.7dB/m@975nm); Output laser is through the back output of collimation outgoing mirror (303) collimation.
Utilize a road idle input optical fibre in 6 road input optical fibres of 6 * 1 multimode pumping optical-fiber bundling devices 1 to connect retroreflection laser power monitoring device 4, this retroreflection laser power monitoring device 4 is a photodiode, the power of monitoring retroreflection laser, this photodiode is converted to intensity signals with the laser power of retroeflection, when intensity signals surpasses default definite value, promptly the driving power 5 to semiconductor pumping sources sends shutdown signal, cut off the electricity supply, being no more than 1% of pump power with retroreflection laser power during setting is upper safety limit.
Claims (5)
1; a kind of fiber laser device with automatic protection of semiconductor pumping sources; it is characterized in that comprising a multimode pumping optical-fiber bundling device; many semiconductor pumping sources; optical-fiber laser equipment; the driving power of retroreflection laser power monitoring device and semiconductor pumping sources; described multimode pumping optical-fiber bundling device has N root input multimode energy-transmission optic fibre and a pumping optical fiber; wherein N is the positive integer greater than 1; this pumping optical fiber is connected with the input of described optical-fiber laser equipment; in the described N root input multimode energy-transmission optic fibre one connects the control end of the driving power of described semiconductor pumping sources by described retroreflection laser power monitoring device, and the connected mode of other N-1 root input multimode energy-transmission optic fibre is:
When described optical-fiber laser equipment was fiber laser, N-1 root input multimode energy-transmission optic fibre respectively connect a semiconductor pumping sources, and this N-1 platform semiconductor pumping sources joins with the output of the driving power of described semiconductor pumping sources again; Or
When described optical-fiber laser equipment is optical fiber laser amplifier, sub-lasing light emitter of inoculation in the N-1 root input multimode energy-transmission optic fibre, in addition N-2 root input multimode energy-transmission optic fibre respectively connects a semiconductor pumping sources, and this N-2 platform semiconductor pumping sources joins with the output of the driving power of described semiconductor pumping sources again;
The laser power that described retroreflection laser power monitoring device monitoring is returned by described optical-fiber laser equipment, the laser power of returning when judgement are crossed when strong, cut off the power supply of the driving power of described semiconductor pumping sources automatically.
2,, it is characterized in that described fiber laser is by constituting grow tall anti-fiber grating, Active Optical Fiber and collimation outgoing mirror of laser wave of connecting successively according to the fiber laser device of right 1 described band automatic protection of semiconductor pumping sources.
3,, it is characterized in that described optical fiber laser amplifier is made of Active Optical Fiber and collimation outgoing mirror according to the fiber laser device of right 1 described band automatic protection of semiconductor pumping sources.
4, according to the fiber laser device of right 1 described band automatic protection of semiconductor pumping sources; it is characterized in that described semiconductor pumping sources is the semiconductor laser of a plurality of semiconductor laser arrays combination, or based on the semiconductor laser of a plurality of semiconductor laser diodes combinations.
5,, it is characterized in that described retroreflection laser power monitoring device is a photodiode according to the fiber laser device of right 1 described band automatic protection of semiconductor pumping sources.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810038509A CN100585966C (en) | 2008-06-04 | 2008-06-04 | Laser device of optical fiber with automatic protection of semiconductor pumping sources |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810038509A CN100585966C (en) | 2008-06-04 | 2008-06-04 | Laser device of optical fiber with automatic protection of semiconductor pumping sources |
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| CN101286618A CN101286618A (en) | 2008-10-15 |
| CN100585966C true CN100585966C (en) | 2010-01-27 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104701715A (en) * | 2015-02-15 | 2015-06-10 | 无锡市中新光通信技术有限公司 | High-integration density multi-channel array optical fiber amplifier |
| CN104993359B (en) * | 2015-07-17 | 2018-01-09 | 中国工程物理研究院激光聚变研究中心 | Optical fiber laser and its safety interlocking and safety interlocking control method |
| CN106997074A (en) * | 2016-01-22 | 2017-08-01 | 深圳朗光科技有限公司 | A kind of high-power optical-fiber bundling device and laser |
| JP7039922B2 (en) | 2017-10-16 | 2022-03-23 | 株式会社島津製作所 | Laser processing equipment |
| CN110323660B (en) * | 2019-07-04 | 2021-04-20 | 江苏亨通光纤科技有限公司 | Anti-return light all-fiber device |
| CN110364916A (en) * | 2019-07-29 | 2019-10-22 | 昂纳信息技术（深圳）有限公司 | A kind of high power pump source ageing system and fiber optic protecting method based on high power pump source ageing system |
| CN113140957B (en) * | 2021-04-16 | 2023-05-02 | 杭州中科极光科技有限公司 | Laser display white balance control system, control method and laser display device |
| CN113671509B (en) * | 2021-08-16 | 2023-07-11 | 南京牧镭激光科技股份有限公司 | High-energy multichannel laser radar beam switching method |
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| EP0917262A2 (en) * | 1997-11-10 | 1999-05-19 | Lucent Technologies Inc. | Wavelength selectable laser source |
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| CN101082690A (en) * | 2006-05-30 | 2007-12-05 | 株式会社藤仓 | Multi-port coupler, optical amplifier, and fiber laser |
| JP2008103631A (en) * | 2006-10-20 | 2008-05-01 | Hamamatsu Photonics Kk | Optical part |
| CN201204378Y (en) * | 2008-06-04 | 2009-03-04 | 中国科学院上海光学精密机械研究所 | Optical fiber laser device with semiconductor pump source automatic protection |
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2008
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Patent Citations (7)
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| US4545682A (en) * | 1983-08-11 | 1985-10-08 | The Singer Company | Optical gyroscope |
| EP0917262A2 (en) * | 1997-11-10 | 1999-05-19 | Lucent Technologies Inc. | Wavelength selectable laser source |
| CN1722548A (en) * | 2004-06-14 | 2006-01-18 | Jds尤尼弗思公司 | Pulsed laser apparatus and method |
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| CN101286618A (en) | 2008-10-15 |
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Owner name: SHANGHAI FEIBO LASER TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: SHANGHAI OPTICAL PRECISION MACHINERY INST., CHINESE ACADEMY OF SCIENCES Effective date: 20120808 |
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Effective date of registration: 20120808 Address after: 201800, Qinghe Road 390, Jiading Town, Shanghai, Jiading District Patentee after: Shanghai Feibo Laser Technologies Co., Ltd. Address before: 201800 Shanghai 800-211 post office box Patentee before: Shanghai Optical Precision Machinery Inst., Chinese Academy of Sciences |
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Effective date of registration: 20200526 Address after: 223815 301, floor 3, Xicheng building, Sucheng District, Suqian City, Jiangsu Province Patentee after: Jiangsu ruisai Photoelectric Technology Co., Ltd Address before: 201800, Qinghe Road 390, Jiading Town, Shanghai, Jiading District Patentee before: SHANGHAI FEIBO LASER TECHNOLOGIES Co.,Ltd. |
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