CN103490273A - High-power optical fiber transmission system - Google Patents
High-power optical fiber transmission system Download PDFInfo
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- CN103490273A CN103490273A CN201310469673.7A CN201310469673A CN103490273A CN 103490273 A CN103490273 A CN 103490273A CN 201310469673 A CN201310469673 A CN 201310469673A CN 103490273 A CN103490273 A CN 103490273A
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Abstract
The invention relates to a high-power optical fiber transmission system. The high-power optical fiber transmission system comprises a laser transmission optical fiber, an end cap, a cladding stripper, a shell, a beam shaping device and a laser protection window. The high-power optical fiber transmission system is characterized in that the laser transmission optical fiber is connected with the end cap in a welding mode, the cladding of the laser transmission optical fiber is combined with the cladding stripper, the end cap, the laser transmission optical fiber, the cladding stripper and the beam shaping device are all fixed in the shell, the laser protection window is fixed on the shell, the beam shaping device and the laser protection window are arranged at the front end of the end cap, a water cooling channel is formed in the shell, and the cladding stripper and one section of the laser transmission optical fiber are arranged in the water cooling channel. According to the high-power optical fiber transmission system, the cladding of the transmission optical fiber is combined with the cladding stripper, the cladding stripper, the transmission optical fiber and the end cap are arranged in the water cooling channel, radiating and cladding stripping of the high-power optical fiber transmission system are achieved, and reliability and long-term stability of devices are improved.
Description
Technical field:
The invention belongs to the fiber laser technology field, relate to the high-power fiber transmission system, for inputting laser signal, in optical fiber, transfer to space, guarantee the laser signal beam quality simultaneously, reduce redundancy laser heating risk, improve product reliability.
Technical background:
Fiber laser is the third generation new laser after traditional gas laser and solid state laser, there is the advantages such as compact conformation, life-span are long, non-maintaining, good beam quality, energy-conserving and environment-protective, be successfully applied to machining, medical treatment, automobile making and the field such as military.Along with the continuous expansion of its application, as laser cutting and the welding of thick sheet metal in the industries such as automobile making, shipbuilding, wish that the power output of fiber laser reaches thousands of watts to tens of kilowatts.
Although simple optical fiber can bear the above power of thousands of watts of ranks, how the laser stabilization in fibre core is transferred to space, and do not reduce beam quality, this remains a difficult problem.Laser, when from fibre core, transferring to space, generally can produce a part of cladding light, and this part light, because the angle of divergence is larger, can produce certain damaging influence to end cap, light path orthopedic systems etc., so need to this part cladding light be divested; In addition, laser is when high power mark, cutting, welding, because work piece surface produces certain reflection for laser, according to the light path principle of reversibility, the a part easy Yan Yuan of reverberation road is back to fiber optic transmission system, until, in optical fiber, this part feedback light very easily makes the optical fiber coating heating until burn, and the laser fed back in optical fiber very easily produces destructive damage to laser cavity.In sum, study a kind of covering stripping off device, and the laser that covering is peeled off out conducts soon, particularly important for the high power laser light transmission system.
Traditional covering is peeled off and radiating solution is to apply one deck high index of refraction glue outside fiber cladding, and makes this part glue and Metal Contact, then, by the indirect heat radiation to metal, calorie spread is gone out.Due to used macromolecular material glue, after long-term high power, applied at elevated temperature, certain deterioration can occur in its refractive index, light transmission, until lost efficacy, makes the covering place of peeling off herein easily burn.
Summary of the invention:
Defect and problem that purpose of the present invention exists in order to overcome prior art, provide a kind of high power laser light transmission system, and this invention is simple in structure, and product is stable, reliable.The present invention adopts outside fiber cladding, employing without adhesive process in conjunction with one section covering stripper, the refractive index of covering stripper is greater than or equal to fiber cladding, fiber cladding light is after the covering stripper, light more than 99% can be stripped from away, directly contact with covering, stripper, end cap by cooling fluid in addition, can make to be stripped from laser and to blaze abroad very soon.
A kind of high-power fiber transmission system, comprise laser transmission fiber, end cap, the covering stripper, housing, beam shaping, the laser radiation window, it is characterized in that: laser transmission fiber and an end cap welding, the laser transmission fiber covering is combined with a covering stripper, end cap, laser transmission fiber, the covering stripper, beam shaping is separately fixed in housing, the laser radiation window is fixed on housing, and beam shaping and laser radiation window are placed in the end cap front end, housing is provided with water-cooling channel, and covering stripper and one section laser transmission fiber are placed in water-cooling channel.
Described laser transmission fiber is monomode fiber or multimode fiber.
Described laser transmission fiber is single cladded fiber, multi-clad, photonic crystal fiber, polarization maintaining optical fibre, multi-core fiber, fiber bundle or Active Optical Fiber.
Described laser transmission fiber is gummed, adhere, welding or bonding in conjunction with one section covering stripper combination.
Described covering stripper Surface Machining indentation; Perhaps chemical texturing, corrosion treatment are carried out in surface, or carry out optics cold working, make surface roughness increase.
Described covering stripper Refractive Index of Material is more than or equal to the Transmission Fibers cladding index, material for for quartz, glass, calcirm-fluoride, fluoridize mould, jewel, silicon or zinc selenide.
Described Transmission Fibers, end cap, covering stripper are placed in a water-cooling channel, and cooling fluid can directly contact with Transmission Fibers, end cap, covering stripper.
The present invention on the Transmission Fibers covering in conjunction with one section covering stripper, and covering stripper, Transmission Fibers, end cap are placed in water-cooling channel, solve the heat radiation of high-power fiber transmission system and peeled off problem with covering, improved reliability and the long-time stability of device.
The accompanying drawing explanation:
Fig. 1 is the structural representation of the embodiment of the present invention.
Fig. 2 is the schematic diagram that the covering stripper is peeled off laser transmission fiber inner cladding light.
Fig. 3 is the schematic diagram of an other example structure of the present invention.
Fig. 4 is product 2000W single mode power stage hot spot schematic diagram of the present invention.
Fig. 5 is 2000W cladding light input of the present invention, device surface variations in temperature schematic diagram.
Embodiment:
As Fig. 1, shown in Fig. 3, a kind of high-power fiber transmission system, comprise laser transmission fiber 6, end cap 1, covering stripper 2, housing 5, beam shaping 3, laser radiation window 4, it is characterized in that: laser transmission fiber 6 and end cap 1 welding, laser transmission fiber 6 coverings and covering stripper 2 combinations, end cap 1, laser transmission fiber 6, covering stripper 2, beam shaping 3 is separately fixed in housing 5, laser radiation window 4 is fixed on housing 5, and beam shaping 3 is placed in end cap 1 front end with laser radiation window 4, housing 5 is provided with water-cooling channel 7, and covering stripper 2 and one section laser transmission fiber 6 are placed in water-cooling channel 7.Described beam shaping 3 is existing structure, directly buys and obtains.
The fiber-optic signal that the laser input optical fibre of take is 7 is example, and its preparation method is as follows:
1, laser transmission fiber is 20-400 (core diameter 20um, cladding diameter 400um), NA=0.065 doubly clad optical fiber, laser beam quality M2<1.2;
2, will divest the coat laser transmission fiber, wiped clean, be through at a segment length 45mm, and surface engraving has in jagged quartz ampoule, quartz ampoule external diameter 2.2mm, internal diameter 410um, jaggy pitch 0.8mm, 45 ° of sawtooth angles, the high Ge that mixes of quartz ampoule; Heat by hydrogen-oxygen, make the quartz ampoule deliquescing of being heated, in aggregates with laser transmission fiber.Also Transmission Fibers first can be through in a quartz ampoule, after treating that quartz ampoule is heated and subsides, then carry out sawtooth processing on surface
3, the end cap welding of the laser transmission fiber of having made the covering stripper and a diameter 10mm, end cap length 25mm, an end polishing, an other end plating AR film, operation wavelength 1080+/-20nm, damage threshold is greater than 20J/cm
2; The end cap outer surface is gold-plated;
4, the laser transmission fiber of having made end cap, be through in the gold-plated sleeve pipe of a copper, copper pipe one end diameter 8mm+0.01, make and be combined copper pipe edge heating again with end cap, and scolding tin on point, make end cap and sealing copper pipe;
5, the other end of copper pipe, have a diameter 550um pore, makes optical fiber coating just can be through in pore, herein upper waterproof glue;
6, end cap, optical fiber, covering stripper are sealed in a housing, and two ends, without leaking, make deionized water to flow in this cavity;
7, add a slice diameter 25mm at exit end, the planoconvex lens of focal length 80mm is as beam shaping, and making the light beam outgoing is a collimated light, and beam divergence angle is less than 0.2mrad; Be provided with water-cooling channel and a laser radiation window on housing, and covering stripper and one section laser transmission fiber are placed in water-cooling channel.
Based on the method, we have successfully realized the output of 2KW single mode collimated light, and efficiency is greater than 99.5%, and the hot spot distortion is less than 3%, use CCD test hot spot to distribute, as shown in Figure 4.
We use the 2000W cladding light to pass into this device, the device for cooling of fetching boiling water, and device surface is stable rises to 29 degree from room temperature 25 degree, strike-machine 30 minutes, device can steady operation, and cladding light divests rate higher than more than 99.5%, illustrate, this structure has been peeled off good effect for covering.Fig. 5 be the device temperature transducer at the device surface temperature variation curve, after can finding out 30 minutes, device temperature tends towards stability.
The transmission laser system of the equal classification in market, allow to bear for a long time cladding light generally in the 100-200W left and right, the transmission laser system that our method is made, can bear for a long time the above cladding light of 700W, short-term can be born the cladding light of 2000W, a lot of than the existing product improvement in performance, properties of product are reliable, stability improves a lot.
Claims (7)
1. a high-power fiber transmission system, comprise laser transmission fiber, end cap, the covering stripper, housing, beam shaping, the laser radiation window, it is characterized in that: laser transmission fiber and an end cap welding, the laser transmission fiber covering is combined with a covering stripper, end cap, laser transmission fiber, the covering stripper, beam shaping is separately fixed in housing, the laser radiation window is fixed on housing, and beam shaping and laser radiation window are placed in the end cap front end, housing is provided with water-cooling channel, and covering stripper and one section laser transmission fiber are placed in water-cooling channel.
2. high-power fiber transmission system as claimed in claim 1, it is characterized in that: laser transmission fiber is monomode fiber or multimode fiber.
3. high-power fiber transmission system as claimed in claim 1, it is characterized in that: laser transmission fiber is single cladded fiber, multi-clad, photonic crystal fiber, polarization maintaining optical fibre, multi-core fiber, fiber bundle or Active Optical Fiber.
4. high-power fiber transmission system as claimed in claim 1, it is characterized in that: laser transmission fiber is in conjunction with a covering stripper, and combination is: gummed, adhere, welding or bonding.
5. high-power fiber transmission system as described as claim 1 or 4, is characterized in that: covering stripper Surface Machining indentation; Perhaps chemical texturing, corrosion treatment are carried out in surface, or carry out optics cold working, make surface roughness increase.
6. high-power fiber transmission system as described as claim 1 or 4, it is characterized in that: covering stripper Refractive Index of Material is more than or equal to the Transmission Fibers cladding index, and material is quartz, glass, calcirm-fluoride, it is mould to fluoridize, jewel, silicon or zinc selenide.
7. high-power fiber transmission system as claimed in claim 1, it is characterized in that: laser transmission fiber, end cap, covering stripper are placed in a water-cooling channel, and cooling fluid can directly contact with laser transmission fiber, end cap, covering stripper.
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| CN201310469673.7A CN103490273A (en) | 2013-10-10 | 2013-10-10 | High-power optical fiber transmission system |
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Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104035166A (en) * | 2014-05-23 | 2014-09-10 | 武汉锐科光纤激光器技术有限责任公司 | Multi-core optical fiber based high power laser beam combiner |
| CN104882770A (en) * | 2015-06-10 | 2015-09-02 | 北京工业大学 | Fiber laser output head having light beam focusing characteristic and power monitoring function |
| CN105449499A (en) * | 2015-12-11 | 2016-03-30 | 中电科天之星激光技术（上海）有限公司 | Filtering method for optical fiber cladding layer light by utilizing waveguide capillary |
| CN105511088A (en) * | 2016-01-22 | 2016-04-20 | 中国人民解放军国防科学技术大学 | High-power optical fiber output system with cladding light filtering-out function |
| CN105527679A (en) * | 2015-12-29 | 2016-04-27 | 孟祥宇 | Fiber laser output head and manufacturing method thereof |
| CN105652462A (en) * | 2016-01-22 | 2016-06-08 | 中国人民解放军国防科学技术大学 | Large-power optical fiber collimator system with cladding light filtering-out function |
| CN105720463A (en) * | 2014-08-01 | 2016-06-29 | 恩耐公司 | Optical fiber, back reflection protection and monitor in laser for optical fiber transmission |
| CN105826802A (en) * | 2016-05-17 | 2016-08-03 | 华中科技大学 | Cladding light stripper for optical fiber lasers and making method thereof |
| CN106646747A (en) * | 2017-01-03 | 2017-05-10 | 中国科学院上海光学精密机械研究所 | Method for manufacturing photonic crystal fiber integrated end caps |
| WO2017096697A1 (en) * | 2015-12-08 | 2017-06-15 | 北京凯普林光电科技股份有限公司 | Input end structure of optical fiber |
| CN107290823A (en) * | 2016-04-01 | 2017-10-24 | 中国兵器装备研究院 | A kind of manufacture method of cladding light stripper |
| CN107591667A (en) * | 2017-08-11 | 2018-01-16 | 西南技术物理研究所 | A kind of novel efficient radiating high power optical fibre laser export head |
| CN105490141B (en) * | 2016-01-22 | 2018-11-30 | 中国人民解放军国防科学技术大学 | A kind of integrated high-power optical-fiber laser output system with cladding light filtering function |
| CN110007408A (en) * | 2019-05-06 | 2019-07-12 | 中国电子科技集团公司第三十四研究所 | A kind of moisture seal type connector based on high power single mode guarantor/mono- special optical fiber partially |
| US10520671B2 (en) | 2015-07-08 | 2019-12-31 | Nlight, Inc. | Fiber with depressed central index for increased beam parameter product |
| US10535973B2 (en) | 2015-01-26 | 2020-01-14 | Nlight, Inc. | High-power, single-mode fiber sources |
| US10656330B2 (en) | 2016-09-29 | 2020-05-19 | Nlight, Inc. | Use of variable beam parameters to control solidification of a material |
| US10673198B2 (en) | 2016-09-29 | 2020-06-02 | Nlight, Inc. | Fiber-coupled laser with time varying beam characteristics |
| US10673197B2 (en) | 2016-09-29 | 2020-06-02 | Nlight, Inc. | Fiber-based optical modulator |
| US10673199B2 (en) | 2016-09-29 | 2020-06-02 | Nlight, Inc. | Fiber-based saturable absorber |
| US10730785B2 (en) | 2016-09-29 | 2020-08-04 | Nlight, Inc. | Optical fiber bending mechanisms |
| CN112332207A (en) * | 2021-01-04 | 2021-02-05 | 中国工程物理研究院激光聚变研究中心 | Laser collimating optical fiber, system, manufacturing method and storage medium |
| US10971884B2 (en) | 2015-03-26 | 2021-04-06 | Nlight, Inc. | Fiber source with cascaded gain stages and/or multimode delivery fiber with low splice loss |
| US10971885B2 (en) | 2014-06-02 | 2021-04-06 | Nlight, Inc. | Scalable high power fiber laser |
| CN113777795A (en) * | 2021-09-19 | 2021-12-10 | 光惠（上海）激光科技有限公司 | High-power optical fiber shaping collimation output device |
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Cited By (34)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104035166A (en) * | 2014-05-23 | 2014-09-10 | 武汉锐科光纤激光器技术有限责任公司 | Multi-core optical fiber based high power laser beam combiner |
| US10971885B2 (en) | 2014-06-02 | 2021-04-06 | Nlight, Inc. | Scalable high power fiber laser |
| CN105720463A (en) * | 2014-08-01 | 2016-06-29 | 恩耐公司 | Optical fiber, back reflection protection and monitor in laser for optical fiber transmission |
| US10901162B2 (en) | 2014-08-01 | 2021-01-26 | Nlight, Inc. | Back-reflection protection and monitoring in fiber and fiber-delivered lasers |
| US10310201B2 (en) | 2014-08-01 | 2019-06-04 | Nlight, Inc. | Back-reflection protection and monitoring in fiber and fiber-delivered lasers |
| US10535973B2 (en) | 2015-01-26 | 2020-01-14 | Nlight, Inc. | High-power, single-mode fiber sources |
| US10916908B2 (en) | 2015-01-26 | 2021-02-09 | Nlight, Inc. | High-power, single-mode fiber sources |
| US10971884B2 (en) | 2015-03-26 | 2021-04-06 | Nlight, Inc. | Fiber source with cascaded gain stages and/or multimode delivery fiber with low splice loss |
| CN104882770A (en) * | 2015-06-10 | 2015-09-02 | 北京工业大学 | Fiber laser output head having light beam focusing characteristic and power monitoring function |
| US10520671B2 (en) | 2015-07-08 | 2019-12-31 | Nlight, Inc. | Fiber with depressed central index for increased beam parameter product |
| WO2017096697A1 (en) * | 2015-12-08 | 2017-06-15 | 北京凯普林光电科技股份有限公司 | Input end structure of optical fiber |
| CN105449499A (en) * | 2015-12-11 | 2016-03-30 | 中电科天之星激光技术（上海）有限公司 | Filtering method for optical fiber cladding layer light by utilizing waveguide capillary |
| CN105449499B (en) * | 2015-12-11 | 2019-05-17 | 中电科天之星激光技术（上海）有限公司 | A kind of fibre cladding light filtering method using waveguide capillary |
| CN105527679A (en) * | 2015-12-29 | 2016-04-27 | 孟祥宇 | Fiber laser output head and manufacturing method thereof |
| CN105527679B (en) * | 2015-12-29 | 2017-11-28 | 孟祥宇 | A kind of optical-fiber laser export head and its manufacture method |
| CN105490141B (en) * | 2016-01-22 | 2018-11-30 | 中国人民解放军国防科学技术大学 | A kind of integrated high-power optical-fiber laser output system with cladding light filtering function |
| CN105652462B (en) * | 2016-01-22 | 2018-05-25 | 中国人民解放军国防科学技术大学 | A kind of large-power optical fiber collimator system with cladding light filtering function |
| CN105652462A (en) * | 2016-01-22 | 2016-06-08 | 中国人民解放军国防科学技术大学 | Large-power optical fiber collimator system with cladding light filtering-out function |
| CN105511088A (en) * | 2016-01-22 | 2016-04-20 | 中国人民解放军国防科学技术大学 | High-power optical fiber output system with cladding light filtering-out function |
| CN107290823A (en) * | 2016-04-01 | 2017-10-24 | 中国兵器装备研究院 | A kind of manufacture method of cladding light stripper |
| CN105826802B (en) * | 2016-05-17 | 2018-08-21 | 华中科技大学 | A kind of cladding light stripper and preparation method thereof for optical fiber laser |
| CN105826802A (en) * | 2016-05-17 | 2016-08-03 | 华中科技大学 | Cladding light stripper for optical fiber lasers and making method thereof |
| US10673197B2 (en) | 2016-09-29 | 2020-06-02 | Nlight, Inc. | Fiber-based optical modulator |
| US10673198B2 (en) | 2016-09-29 | 2020-06-02 | Nlight, Inc. | Fiber-coupled laser with time varying beam characteristics |
| US10663767B2 (en) | 2016-09-29 | 2020-05-26 | Nlight, Inc. | Adjustable beam characteristics |
| US10673199B2 (en) | 2016-09-29 | 2020-06-02 | Nlight, Inc. | Fiber-based saturable absorber |
| US10730785B2 (en) | 2016-09-29 | 2020-08-04 | Nlight, Inc. | Optical fiber bending mechanisms |
| US10656330B2 (en) | 2016-09-29 | 2020-05-19 | Nlight, Inc. | Use of variable beam parameters to control solidification of a material |
| CN106646747A (en) * | 2017-01-03 | 2017-05-10 | 中国科学院上海光学精密机械研究所 | Method for manufacturing photonic crystal fiber integrated end caps |
| CN107591667A (en) * | 2017-08-11 | 2018-01-16 | 西南技术物理研究所 | A kind of novel efficient radiating high power optical fibre laser export head |
| CN110007408A (en) * | 2019-05-06 | 2019-07-12 | 中国电子科技集团公司第三十四研究所 | A kind of moisture seal type connector based on high power single mode guarantor/mono- special optical fiber partially |
| CN110007408B (en) * | 2019-05-06 | 2023-10-03 | 中国电子科技集团公司第三十四研究所 | Dampproofing sealed connector based on high-power single mode protection/single offset special optic fibre |
| CN112332207A (en) * | 2021-01-04 | 2021-02-05 | 中国工程物理研究院激光聚变研究中心 | Laser collimating optical fiber, system, manufacturing method and storage medium |
| CN113777795A (en) * | 2021-09-19 | 2021-12-10 | 光惠（上海）激光科技有限公司 | High-power optical fiber shaping collimation output device |
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Application publication date: 20140101 |