CN203480085U - Fiber laser beam combiner - Google Patents
Fiber laser beam combiner Download PDFInfo
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- CN203480085U CN203480085U CN201320599753.XU CN201320599753U CN203480085U CN 203480085 U CN203480085 U CN 203480085U CN 201320599753 U CN201320599753 U CN 201320599753U CN 203480085 U CN203480085 U CN 203480085U
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- fibre bundle
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Abstract
The utility model relates to a fiber laser beam combiner including a plurality of laser input fibers, an end cap, a mechanical member, and an optical cable. The fiber laser beam combiner is characterized in that one ends of the laser input fibers are combined into a fiber bundle by means of fused biconical taper, the fiber bundle is welded with the end cap, the fiber bundle and the end cap are fixed in the mechanical member, and the plurality of laser input fibers are fixed in the optical cable to combine an integral body. The fiber bundle and the end cap are directly welded, so that the plurality of laser input fibers are combined into a bundle to reduce loss and the light beam quality deterioration caused by mode influence. The fiber laser beam combiner realizes the functions of laser beam combination and laser transmission on one device and has the advantages of small size, high reliability, and high integration; moreover, the fiber laser beam combiner can realize high-power laser beam combination on the basis of guaranteeing the high beam quality.
Description
Technical field:
The utility model belongs to fiber laser technology field, relates to a kind of optical-fiber laser bundling device, for by the signal of multiplex high power laser instrument input, synthesizes an output, reaches the object that improves fiber laser output power, guarantees beam quality simultaneously.
Background technology:
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 instrument cutting and the welding of thick sheet metal in the industries such as automobile making, propagation manufacture, wish that the output power of fiber laser reaches thousands of watts to tens of kilowatts.
Although the output power of simple optical fiber has broken through 2000W at present, but only limit to laboratory level, and the restriction due to physical mechanisms such as the nonlinear effect in doped fiber and fire damages, the further lifting of simple optical fiber output power will be very difficult, and the ripe general power of single fiber laser power cell is in 1500W left and right at present.
For improving the output power of fiber laser, this just need to be combined into a branch of output by a plurality of fiber laser power cells, mainly contains relevant synthetic and two kinds of methods of Incoherent beam combining.The relevant composite structure of fiber laser is comparatively complicated, and is difficult for regulating, and reliability, stability are not good, and report is realized peak power only for thousands of watts both at home and abroad at present, is not suitable for being applied in high-capacity optical fiber laser product.The Incoherent beam combining of fiber laser mainly contains raster method, volume Bragg grating method etc., but these free space element precision prescribeies are high and poor stability, are not also suitable for manufacturing high-capacity optical fiber laser product.
Traditional optic fiber power beam combiner generally adopts multifiber to draw cone, become a branch of, then with a fused fiber splice, last and optical patchcord welding, exports as output terminal.This scheme is because optical-fiber bundling device and optical patchcord are two parts, reliability is greatly declined and cost very high; Owing to there are two fusion points, the loss of device is higher, for the above high power of 1KW, and the loss of every increase by 0.5%, device reliability, stability can decline more than 10%; Owing to there is very long one section of multimode optical fiber in the middle of device, after overcoupling, beam quality greatly affects.
Summary of the invention:
Defect and problem that the purpose of this utility model exists in order to overcome prior art, a kind of optical-fiber laser bundling device is provided, having overcome that relevant synthetic power is not high, poor stability, the synthetic beam quality of conventional power is poor, high in cost of production defect problem, realized multiple laser, high power, high light beam quality synthesize.
The utility model relates to for fiber laser power synthetic laser bundling device and transmission system, comprises multi-path laser input signal, laser bundling device, high power end cap, and fixedly holder and the optical fiber cable of said apparatus.Described laser bundling device is characterized in that, input end is multi-path laser signal, by passing through fused biconical taper, be combined into a branch of fibre bundle, by welding, fibre bundle is combined with output end cap, this fibre bundle and end cap are fixed in a mechanical parts, multiple beams of optical fiber bundle is fixed in optical cable, makes to be combined into one.The utility model, by fibre bundle and the direct welding mode of end cap, makes multiple laser close bundle, has reduced loss, has reduced the beam quality deterioration that pattern impact causes.This invention has realized the function of a plurality of devices on a device, has that volume is little, reliability is high, and integrated level advantages of higher can on the basis of high light beam quality, realize high power laser light and close bundle guaranteeing.
A kind of optical-fiber laser bundling device, comprise many laser input optical fibres, end cap, mechanical parts, optical cable, it is characterized in that: fused biconical taper is passed through in one end of many laser input optical fibres, be combined into a branch of fibre bundle, fibre bundle and end cap welding, and fibre bundle and end cap are fixed in a mechanical parts, many laser input optical fibres are fixed in optical cable, are combined into one.
Laser input optical fibre is single-mode fiber or multimode optical fiber.
Laser input optical fibre is single cladded-fiber, multi-clad, photonic crystal fiber, polarization maintaining optical fibre, multi-core fiber, fibre bundle or Active Optical Fiber.
One end of many laser input optical fibres is combined into a branch of fibre bundle by fused biconical taper, and fibre bundle end makes its end face by cutting or grinding and polishing.
Many laser input optical fibres are beaten strand or are worn in a sleeve pipe by rotation, are combined into a branch ofly, by melting, draw cone to make to be bonded to each other, and oxyhydrogen flame, graphite silk, laser or electrode discharge mode are used in fused biconical taper heating; The mode of heating is direct heat contact or indirect thermal conduction.
After fibre bundle end face, a direct and end cap welding, adopts oxyhydrogen flame, graphite silk, laser or the welding of electrode discharge mode.
The material of described end cap is high-purity fused quartz, calcium fluoride, it is mould to fluoridize, jewel, silicon or zinc selenide.
One end of described end cap and fibre bundle welding, one end grinding and polishing is circular-arc, end face coating in addition.
The utility model, by fibre bundle and the direct welding mode of end cap, makes many laser input optical fibres close bundle, reduces loss, reduces the beam quality deterioration that pattern impact causes.The utility model has been realized a plurality of functions such as sharp combiner and Laser Transmission on a device, has that volume is little, reliability is high, and integrated level advantages of higher can on the basis of high light beam quality, realize high power laser light and close bundle guaranteeing.
Accompanying drawing explanation:
Fig. 1 be the utility model embodiment provide front view.
Fig. 2 is fibre bundle cutting rear end face schematic diagram of the present utility model.
Fig. 3,4 is respectively laser propagation schematic diagram after fibre bundle of the present utility model and end cap welding.
Fig. 5 is that 7 bundle laser of the present utility model are at end cap end face light beam schematic diagram.
Embodiment:
As shown in Figure 1, the utility model comprises many laser input optical fibres 16, end cap 11, mechanical parts 12, optical cable 13, one end of many laser input optical fibres 16, by fused biconical taper, is combined into a branch of fibre bundle 14, and fibre bundle 14 ends make its end face as shown in Figure 2 by cutting or grinding and polishing; Fibre bundle 14 and end cap 11 weldings, end cap other one end grinding and polishing is circular-arc, end face coating; And fibre bundle 14 is fixed in a mechanical parts 12 with end cap 11, and many laser input optical fibres 16 are fixed in optical cable 13, are combined into one.Fused biconical taper adopts existing apparatus to realize.After fibre bundle and end cap welding, laser propagation as shown in Figure 3, Figure 4.
The fiber-optic signal that the laser input optical fibre of take is 7 is example, and its preparation method is as follows:
1,7 road laser input optical fibres are the doubly clad optical fiber of core diameter 20um, cladding diameter 400um, NA=0.065, laser beam quality M2<1.2;
2, the doubly clad optical fiber that is core diameter 20um, cladding diameter 400um by 7 optical fiber, is through in a quartz socket tube, uses oxyhydrogen flame to draw cone machine, and drawing cone machine is existing apparatus, and fibre bundle is drawn and bore to 300um, 7 optical fiber, single covering is 80um;
3, use this to draw cone machine, cutting in the middle of La Zhuizhui district, cutting end plane angle is less than 0.5 °;
4,, the quartz pushrod two ends grinding and polishing of a 10mm, end face grinding and polishing roughness is less than 0.5nm, one end plating anti-reflection film, and anti-reflection film transmitance is higher than 99.9%, and surface damage threshold value is higher than 20J/cm
2.One end and above-mentioned fibre bundle welding in addition, welding adopts hydrogen, the welding of oxygen flame;
5, above-mentioned end cap and fibre bundle integral body are fixed in a copper pipe, copper pipe is fixed in a metal sleeve, and 7 laser input optical fibres are through in a metal armouring, and metal armouring is connected, is fixed into as a whole with metal sleeve.
6, end cap exit end is fixed a laser radiation window, mode contamination by dust end cap end face.
Based on the method, we have successfully realized 7 bundle laser inputs, efficiency is greater than 99.8%, BPP<1.5, when 7 bundle laser are inputted simultaneously, end cap end face is used CCD test hot spot to distribute, as shown in Figure 5, whole hot spot is evenly distributed, and does not distort, and the fine beam quality that guarantees every Shu Jiguang of the method is described.
The power bundling device of the equal classification in market, efficiency is greater than 98%, BPP<2.5, and the bundling device that our method is made improves a lot compared with its performance.
Claims (8)
1. an optical-fiber laser bundling device, comprise many laser input optical fibres, end cap, mechanical parts, optical cable, it is characterized in that: fused biconical taper is passed through in one end of many laser input optical fibres, be combined into a branch of fibre bundle, fibre bundle and end cap welding, and fibre bundle and end cap are fixed in a mechanical parts, many laser input optical fibres are fixed in optical cable, are combined into one.
2. optical-fiber laser bundling device as claimed in claim 1, is characterized in that: laser input optical fibre is single-mode fiber or multimode optical fiber.
3. optical-fiber laser bundling device as claimed in claim 1, is characterized in that: laser input optical fibre is single cladded-fiber, multi-clad, photonic crystal fiber, polarization maintaining optical fibre, multi-core fiber, fibre bundle or Active Optical Fiber.
4. optical-fiber laser bundling device as claimed in claim 1, is characterized in that: one end of many laser input optical fibres is combined into a branch of fibre bundle by fused biconical taper, and fibre bundle end makes its end face by cutting or grinding and polishing.
5. the optical-fiber laser bundling device as described in claim 1 or 4, it is characterized in that: many laser input optical fibres are beaten strand or worn in a sleeve pipe by rotation, be combined into a branch of, by melting, draw cone to make to be bonded to each other, oxyhydrogen flame, graphite silk, laser or electrode discharge mode are used in fused biconical taper heating; The mode of heating is direct heat contact or indirect thermal conduction.
6. optical-fiber laser bundling device as claimed in claim 1, is characterized in that: a direct and end cap welding after fibre bundle end face, adopts oxyhydrogen flame, graphite silk, laser or the welding of electrode discharge mode.
7. the optical-fiber laser bundling device as described in claim 1 or 6, is characterized in that: the material of described end cap is high-purity fused quartz, calcium fluoride, it is mould to fluoridize, jewel, silicon or zinc selenide.
8. the optical-fiber laser bundling device as described in claim 1 or 6, is characterized in that: one end of described end cap and fibre bundle welding, one end grinding and polishing is circular-arc, end face coating in addition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320599753.XU CN203480085U (en) | 2013-09-27 | 2013-09-27 | Fiber laser beam combiner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320599753.XU CN203480085U (en) | 2013-09-27 | 2013-09-27 | Fiber laser beam combiner |
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| CN203480085U true CN203480085U (en) | 2014-03-12 |
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| CN201320599753.XU Expired - Lifetime CN203480085U (en) | 2013-09-27 | 2013-09-27 | Fiber laser beam combiner |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487901A (en) * | 2013-09-27 | 2014-01-01 | 武汉锐科光纤激光器技术有限责任公司 | Optical fiber laser bundle combining device |
| CN108152889A (en) * | 2018-03-19 | 2018-06-12 | 江苏斯德雷特通光光纤有限公司 | It is a kind of to be used to make the device and method that high-precision low loss fiber Y divides device |
| AU2015301630B2 (en) * | 2014-08-13 | 2021-02-18 | Ipg Photonics Corporation | Multibeam fiber laser system |
| WO2021077572A1 (en) * | 2019-10-24 | 2021-04-29 | 武汉锐科光纤激光技术股份有限公司 | Method for changing laser output divergence angle |
-
2013
- 2013-09-27 CN CN201320599753.XU patent/CN203480085U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487901A (en) * | 2013-09-27 | 2014-01-01 | 武汉锐科光纤激光器技术有限责任公司 | Optical fiber laser bundle combining device |
| AU2015301630B2 (en) * | 2014-08-13 | 2021-02-18 | Ipg Photonics Corporation | Multibeam fiber laser system |
| CN108152889A (en) * | 2018-03-19 | 2018-06-12 | 江苏斯德雷特通光光纤有限公司 | It is a kind of to be used to make the device and method that high-precision low loss fiber Y divides device |
| CN108152889B (en) * | 2018-03-19 | 2023-07-14 | 江苏斯德雷特光纤科技有限公司 | Device and method for manufacturing high-precision low-loss optical fiber Y-splitter |
| WO2021077572A1 (en) * | 2019-10-24 | 2021-04-29 | 武汉锐科光纤激光技术股份有限公司 | Method for changing laser output divergence angle |
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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. |
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Granted publication date: 20140312 |
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| CX01 | Expiry of patent term |