CN102809783B - Diaphragm type fiber laser coupler - Google Patents
Diaphragm type fiber laser coupler Download PDFInfo
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- CN102809783B CN102809783B CN201210279265.0A CN201210279265A CN102809783B CN 102809783 B CN102809783 B CN 102809783B CN 201210279265 A CN201210279265 A CN 201210279265A CN 102809783 B CN102809783 B CN 102809783B
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Abstract
The invention discloses a diaphragm type fiber laser coupler which comprises a plurality of laser transmitting fibers, at least one coupling laser and two cylinders. The diaphragm type fiber laser coupler is characterized in that the laser transmitting fibers are fixed into one cylinder, the coupling lasers are fixed into the other cylinder, end surfaces of the fibers fixed to one ends of the two cylinders are uniformly coated, and the two cylinders are fixed, so that the coated end surfaces of the laser transmitting fibers in the corresponding cylinder contact with the coated end surfaces of the coupling fibers in the other cylinder. A light path of a fiber laser based on the fiber laser coupler is combined with a fiber feedback cavity, fiber brag grating is omitted, and the light path is reliable and stable and good in performance.
Description
Technical field
The invention belongs to optical-fiber laser coupling mechanism field, relate in particular to a kind of diaphragm-type optical-fiber laser couplers.
Background technology
Fiber laser has that beam quality is excellent, conversion efficiency is high, full light channel structure, the advantage such as easy to maintenance, be widely used at present in a lot of industrial circles, such as: material cutting, boring, welding, mark etc.High-capacity optical fiber laser at present, conventional scheme is that utilization optical fiber bragg grating FBG, adds that Pump semiconductor laser and some passive devices based on fused biconical taper technique form whole light path system.Due to the problem of the intrinsic manufacturing process of FBG grating, its device varies with temperature, and performance has larger impact, in addition after long-term high power uses, also can there is variation in various degree in its optical characteristics, so this device is a bottleneck of whole laser system thereupon.Based on the large mode field diameter of LMA() optical fiber, can reduce unit area optical density and reduce optical nonlinear effect, be widely used at present fiber laser light path system.Because LMA optical fiber is supported high-order mode, and in order to guarantee beam quality, general its fiber core NA is smaller, so this optical fiber is to bending, rather around very responsive, in with this type of optical fiber fabrication passive device (device such as fiber coupler, pattern matcher, ENDCAP): not only will guarantee that energy loss is little, and must guarantee that beam quality does not change as far as possible.Based on the passive device of fused biconical taper technique, optical fiber need to be transferred to coat, make optical fiber or fibre bundle after thermal source heating, fused biconical taper, the quality in cone district has determined the performance of device, but in actual fabrication process, owing to being subject to the platform stable that stretches, the impacts such as thermal source stability, in actual fabrication process, there are some problems in cone district, make optical fiber in the time of welding, have some losses, general pumping depletion is in 2%-10% left and right, loss of signal is at 5%-15%, for the high-power component of KW rank, loss means whole device, there is test in the thermal stability of whole system, and the Efficiency Decreasing of whole light path system, this will make to use more high-power PUMP just can reach the single mode power needing, this has just increased the cost of system.
Summary of the invention
Defect and problem that object of the present invention exists in order to overcome above-mentioned prior art, a kind of diaphragm-type optical-fiber laser couplers is provided, this coupling mechanism not only single mode, pumping depletion is little, and directly combines FBG function, makes whole light path Performance And Reliability obtain optimization.
A kind of diaphragm-type optical-fiber laser couplers, comprise many laser transmission fibers and at least one coupled fiber, two cylinders, it is characterized in that: described many laser transmission fibers are fixed in same cylinder, described coupled fiber is fixed in another cylinder, be fixed on the even plated film of each fiber end face of two cylinder one end, fix two cylinders and make the plated film end face of two laser transmission fibers in cylinder and the plated film end contact of coupled fiber.
Described laser transmission fiber or coupled fiber for through melting, bonding, be arranged in cylinder after drawing cone, burn into grinding and polishing optical fiber after treatment or fiber body, many laser transmission fibers or many coupled fibers to melt to pull into an entirety.
The end face of described laser transmission fiber is coated with the combination of one or more retes in antireflective coating, the rete that improves reverse isolation degree, high-reflecting film layer, low anti-rete.
The end face of described coupled fiber is coated with the combination of one or more retes in antireflective coating, the rete that improves reverse isolation degree, high-reflecting film layer, low anti-rete.
The end face of described laser transmission fiber or coupled fiber and fixing cylinder end face have certain interval.
Described laser transmission fiber is single mode, multimode, few mould, protect partially, the combination of one or more optical fiber in double clad, photonic crystal fiber.
Described coupled fiber for single mode, multimode, few mould, protect partially, the combination of one or more optical fiber in double clad, photonic crystal fiber.
The cylinder of the cylinder of fixed laser Transmission Fibers and fixed coupling optical fiber, is connected or is fixed in same sleeve by flange, makes the plated film end face of two laser transmission fibers in cylinder and the plated film end contact of coupled fiber.
Use the light path of the integrated fiber laser of diaphragm-type optical-fiber laser couplers of the present invention to use the rete at two ends to form cavity, replaced traditional FBG, the reliability of whole fiber laser and efficiency are improved significantly.In the light channel structure of fiber laser, 13 105-125 NA=0.22 of pumping pass into 60W, amount to 780W pumping, and whole light path efficiency is greater than 72%, output 500W power, and beam quality is less than 1.2.The pumping coupling efficiency of this fiber laser light path reaches 98.5%, signal differential loss is less than 0.15dB, device performance is better than traditional fused biconical taper coupling mechanism, pump light directly passes into Yb optical fiber in addition, make fiber laser go less multiple fusing a little, when reducing the wastage, also improve efficiency, reduced the risk of system.
Accompanying drawing explanation
Fig. 1 a is the structural representation that the embodiment of the present invention provides;
Fig. 1 b is the structural representation that another embodiment of the present invention provides;
Fig. 2 a is the side schematic view of the fixing many laser transmission fiber cylinders of Fig. 1 a of the present invention;
Fig. 2 b is the side schematic view of Fig. 1 b fixed coupling optical fiber cylinder of the present invention;
Fig. 3 a is the stereographic map of Fig. 1 a;
Fig. 3 b is the stereographic map of Fig. 1 b;
Fig. 4 is the enlarged drawing at A place in Fig. 3 b;
Fig. 5 is the light path system figure of conventional fiber laser instrument;
Fig. 6 is the light path system figure of the integrated fiber laser of optical fiber power coupling mechanism of the present invention.
Embodiment
A kind of optical-fiber laser coupling mechanism and fiber laser light path system based on diaphragm type is provided, a kind of diaphragm-type optical-fiber laser couplers, it is characterized in that, described optical fiber power coupling mechanism comprises many laser transmission fibers and at least one coupled fiber, described many laser transmission fibers are fixed in same cylinder, and described coupled fiber is fixed in another cylinder, after two cylinder fiber end face plated films, by fixing, make two ends optical fiber contact.Fiber laser light path system based on this optical-fiber laser coupling mechanism, combines optical fiber feedback cavity, and without re-using fiber grating, light path is more reliable, stable, and performance is good.
As Fig. 1 a, shown in Fig. 3 a, a kind of diaphragm-type optical-fiber laser couplers, by many laser transmission fibers 7 and a coupled fiber 1, two cylinders (2, 6), two flanges (4, 5), many laser transmission fibers 7 are fixed in same cylinder 6, a coupled fiber 1 is fixed in another cylinder 2, be fixed on the even plated film of each fiber end face of two cylinder one end, two cylinders (2, 6) flange (4 is fixed respectively in one end, 5), being fixed on two flanges on cylinder is bolted on and makes together the plated film end face 9 of two laser transmission fibers 7 in cylinder and the plated film end face 9 of coupled fiber 1 contact.
As shown in Fig. 1 b, Fig. 3 b, a kind of diaphragm-type optical-fiber laser couplers, by many laser transmission fibers 7 and coupled fiber 1, two cylinders (2,6) a, sleeve 8, many laser transmission fibers 7 are fixed in same cylinder 6, a coupled fiber 1 is fixed in another cylinder 2, be fixed on the even plated film of each fiber end face of two cylinder one end, two cylinders (2,6) are fixed in same sleeve 8 and the plated film end face 9 of two laser transmission fibers 7 in cylinder and the plated film end face 9 of coupled fiber 1 are contacted.
As shown in Figure 1 a, 1 b, described laser transmission fiber 7 is single mode, multimode, few mould, protect partially, the combination of one or more optical fiber in double clad, photonic crystal fiber, many laser transmission fibers 7 form a branch of fibre bundle, be through in a cylinder, this laser transmission fiber can be many same optical fiber, also can be the combination of various optical fiber, this group optical fiber can be the optical fiber that diameter is the same, combination that also can different-diameter optical fiber.
The fibre bundle that many laser transmission fibers 7 form can be by gummed, or fused biconical taper, or burn into grinding and polishing is through in a cylinder 6 after processing, and the material of cylinder can be quartz glass, pottery, alloy or metal.The fibre bundle that many laser transmission fibers 7 form is through at after cylinder, can be fixed in a cylinder by gummed, melting or mechanical grip method, one end of cylinder is provided with a flange 5, between the fibre bundle end face that as shown in Figure 2 a, many laser transmission fibers 7 form and cylinder end face, there is certain intervals.Then the fibre bundle and cylinder 6 end face that by grinding and polishing or laser cutting method, many laser transmission fibers 7 are formed.As shown in Figure 3 a, in order to improve the reverse isolation degree of laser, also can make fibre bundle that many laser transmission fibers 7 form and cylindrical shape at an angle, such as 8-10 degree; At fiber end face 9 plated films, can be the combination of one or more retes in antireflective coating, the rete that improves reverse isolation degree, high-reflecting film layer, low anti-rete afterwards.
The fibre bundle that in like manner many laser transmission fibers 7 form can be by gummed, or fused biconical taper, or burn into grinding and polishing is through in a cylinder 6 after processing, and the material of cylinder can be quartz glass, pottery, alloy or metal.The fibre bundle that many laser transmission fibers 7 form is through at after cylinder, can be fixed in a cylinder by gummed, melting or mechanical grip method, two cylinders are fixed in same sleeve 8 as shown in figure Fig. 2 b, and the plated film end face 9 of two laser transmission fibers 7 in cylinder and the plated film end face 9 of coupled fiber 1 are contacted.
In like manner, described sharp coupled fiber 1 is single mode, multimode, few mould, protect partially, the combination of one or more optical fiber in double clad, photonic crystal fiber, coupled fiber 1 is through in another cylinder 2, this coupled fiber can be simple optical fiber, also can be multifiber, also can be the combination of various optical fiber, this combination of fiber-optic can be the optical fiber that diameter is the same, combination that also can different-diameter optical fiber.
The coupled fiber of many combinations can be by glue and, or fused biconical taper, or burn into grinding and polishing is through in another cylinder 2 after processing.The material of cylinder can be quartz glass, pottery or alloying metal.The fibre bundle of many coupled fibers composition is through at after another cylinder 2, can by glue and, melting or mechanical grip method be fixed in another cylinder 2, between the end face of coupled fiber and cylinder end face, has certain intervals.Then make coupled fiber and cylinder end face by the method such as grinding and polishing or cut.As shown in Fig. 3 b, Fig. 3 b, in order to improve the reverse isolation degree of laser, also can make fibre bundle and cylindrical shape at an angle, such as 8-10 degree, this angle must be consistent with laser transmission fiber.At fiber end face plated film, can be antireflective coating or the rete of raising reverse isolation degree or the combination of high-reflecting film layer or low anti-rete or these retes afterwards.
As shown in Figure 4, fixed laser Transmission Fibers cylinder 6 and the cylinder 2 of fixed coupling optical fiber are positioned in same sleeve 8, two ends optical fiber is combined.Or as shown in Figure 3 b,, by conventional mechanical method for positioning and fixing, cylinder is closed up mutually.
As shown in Figure 6, the fiber laser light path system that uses diaphragm-type optical-fiber laser couplers 11 of the present invention to form.Shown in Fig. 5, conventional fiber laser light path system, has used fiber grating, diaphragm-type optical-fiber laser couplers 11 of the present invention is integrated optical-fiber laser coupling mechanism and two kinds of functions of fiber grating.
Illustrate, described laser transmission fiber has 2 kinds of combinations, one is 7 105/125 NA=0.22 multimode optical fibers, one is 6 105/125 NA=0.22 multimode optical fibers, middle one is 20-125, NA=0.06 less fundamental mode optical fibre, 7 optical fiber are through in the cylinder 6 that an internal diameter is 380-385um, and the external diameter of cylinder is 2.5mm, and material is aluminum, by filling low-refraction glue, optical fiber is fixed in cylinder, cylinder grinds together with fibre bundle, is coated with 1070-1090nm on 7 root multimode fiber surfaces, and 99% HR is high anti-, to 900-985nm, 99% is thoroughly high; 6 root multimode fibers and a less fundamental mode optical fibre show to be coated with 1070-1090nm, 10% reflection, 900-985nm is thoroughly high; Output coupled fiber can be the Yb doubly clad optical fiber of 20-400 NA=0.06, because doubly clad optical fiber coat is the second covering, so can not make double clad covering directly contact with cylinder in being through at cylinder, cladding light is adsorbed by cylinder, the method solving can make coupled fiber be through in cylinder together with coat, also can use, the optical fiber (or triply coated fiber) that the second covering is airport is as synthetic fibre-optical.The two ends of this optical fiber are coated with AR film.
As shown in Figure 6, two ends that also can 7 optical fiber are coated with AR film, and one end of Yb optical fiber 12 is coated with 1070-1090nm, 10% reflection, and 900-985nm, 99% is thoroughly high; One end is coated with 1070-1090nm in addition, 10% reflection, and 900-985nm, 99% is thoroughly high;
Then two cylinders are through in the sleeve 8 that internal diameter is 2.5+ 0.05mm, after 9 contacts of two ends fiber end face, two cylinders and sleeve are fixed.
Use the light path of the integrated fiber laser of diaphragm-type optical-fiber laser couplers 11 of the present invention to use the rete at two ends to form cavity, replaced traditional FBG, the reliability of whole fiber laser and efficiency are improved significantly.In the light channel structure of fiber laser, 13 105-125 NA=0.22 of pumping pass into 60W, amount to 780W pumping, and whole light path efficiency is greater than 72%, output 500W power, and beam quality is less than 1.2.The pumping coupling efficiency of this fiber laser light path reaches 98.5%, signal differential loss is less than 0.15dB, device performance is better than traditional fused biconical taper coupling mechanism, pump light directly passes into Yb optical fiber 12 in addition, again by exporting by output 13 after another diaphragm-type optical-fiber laser couplers 11, make fiber laser go less multiple fusing a little, when reducing the wastage, also improved efficiency, reduced the risk of system.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. a diaphragm-type optical-fiber laser couplers, comprise many laser transmission fibers and at least one coupled fiber, two cylinders, it is characterized in that: described many laser transmission fibers are fixed in same cylinder, described coupled fiber is fixed in another cylinder, be fixed on the even plated film of each fiber end face of two cylinder one end, fix two cylinders and make the plated film end face of two laser transmission fibers in cylinder and the plated film end contact of coupled fiber.
2. diaphragm-type optical-fiber laser couplers as claimed in claim 1, it is characterized in that: described laser transmission fiber or coupled fiber for through melting, bonding, be arranged in cylinder after drawing cone, burn into grinding and polishing optical fiber after treatment or fiber body, many laser transmission fibers or many coupled fibers to melt to pull into an entirety.
3. diaphragm-type optical-fiber laser couplers as claimed in claim 1 or 2, is characterized in that: the end face of described laser transmission fiber is coated with the combination of one or more retes in antireflective coating, the rete that improves reverse isolation degree, high-reflecting film layer, low anti-rete.
4. diaphragm-type optical-fiber laser couplers as claimed in claim 1 or 2, is characterized in that: the end face of described coupled fiber is coated with the combination of one or more retes in antireflective coating, the rete that improves reverse isolation degree, high-reflecting film layer, low anti-rete.
5. diaphragm-type optical-fiber laser couplers as claimed in claim 1 or 2, is characterized in that: the end face of described laser transmission fiber or coupled fiber and fixing cylinder end face have certain interval.
6. as the diaphragm-type optical-fiber laser couplers of right 1 or 2, it is characterized in that: described laser transmission fiber is single mode, multimode, few mould, protect partially, the combination of one or more optical fiber in double clad, photonic crystal fiber.
7. as the diaphragm-type optical-fiber laser couplers of right 1 or 2, it is characterized in that: described coupled fiber for single mode, multimode, few mould, protect partially, the combination of one or more optical fiber in double clad, photonic crystal fiber.
8. as the diaphragm-type optical-fiber laser couplers of right 1 or 2, it is characterized in that: the cylinder of the cylinder of fixed laser Transmission Fibers and fixed coupling optical fiber, connect or be fixed in same sleeve by flange, making the plated film end face of two laser transmission fibers in cylinder and the plated film end contact of coupled fiber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210279265.0A CN102809783B (en) | 2012-08-08 | 2012-08-08 | Diaphragm type fiber laser coupler |
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| CN201210279265.0A CN102809783B (en) | 2012-08-08 | 2012-08-08 | Diaphragm type fiber laser coupler |
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| CN102809783A CN102809783A (en) | 2012-12-05 |
| CN102809783B true CN102809783B (en) | 2014-06-11 |
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| US4900118A (en) * | 1987-05-22 | 1990-02-13 | Furukawa Electric Co., Ltd. | Multiple-fiber optical component and method for manufacturing of the same |
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| CN1372155A (en) * | 2002-03-20 | 2002-10-02 | 燕山大学 | Laser optical fibre coupler |
| JP2008275996A (en) * | 2007-05-01 | 2008-11-13 | Fujifilm Corp | Light guide member |
| CN201159786Y (en) * | 2007-10-30 | 2008-12-03 | 河南大学 | Semiconductor laser-optical fibre coupler |
| CN101915960A (en) * | 2009-10-14 | 2010-12-15 | 博创科技股份有限公司 | Optical wavelength reflector and manufacture method thereof |
| CN202837591U (en) * | 2012-08-08 | 2013-03-27 | 武汉锐科光纤激光器技术有限责任公司 | Diaphragm type optical fiber laser coupler |
| JP5210059B2 (en) * | 2008-06-17 | 2013-06-12 | 株式会社ユーシン | Operating device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05210059A (en) * | 1992-01-31 | 1993-08-20 | Matsushita Electric Works Ltd | Optical fiber driving relay |
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Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0201028A1 (en) * | 1985-05-03 | 1986-11-12 | Siemens Aktiengesellschaft | Optical switching element |
| US4900118A (en) * | 1987-05-22 | 1990-02-13 | Furukawa Electric Co., Ltd. | Multiple-fiber optical component and method for manufacturing of the same |
| CN2213345Y (en) * | 1994-05-03 | 1995-11-22 | 河南大学 | Laser optical fibre movable coupler |
| CN1372155A (en) * | 2002-03-20 | 2002-10-02 | 燕山大学 | Laser optical fibre coupler |
| JP2008275996A (en) * | 2007-05-01 | 2008-11-13 | Fujifilm Corp | Light guide member |
| CN201159786Y (en) * | 2007-10-30 | 2008-12-03 | 河南大学 | Semiconductor laser-optical fibre coupler |
| JP5210059B2 (en) * | 2008-06-17 | 2013-06-12 | 株式会社ユーシン | Operating device |
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Address after: 430074 East Lake science and technology zone, Wuhan province high tech Avenue, No. 999, the future of science and technology city of the city of Hubei Patentee after: WUHAN RAYCUS FIBER LASER TECHNOLOGIES CO., LTD. Address before: 430223 East Lake New Technology Development Zone, Huazhong University of Science and Technology, Wuhan science and technology park innovation base, building No. 10, building No. Patentee before: Wuhan Raycus Fiber Laser Technologies Co., Ltd. |