CN101251623A - Fusion splicing devices and methods of photon crystal optical fiber - Google Patents
Fusion splicing devices and methods of photon crystal optical fiber Download PDFInfo
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- CN101251623A CN101251623A CNA2008100546227A CN200810054622A CN101251623A CN 101251623 A CN101251623 A CN 101251623A CN A2008100546227 A CNA2008100546227 A CN A2008100546227A CN 200810054622 A CN200810054622 A CN 200810054622A CN 101251623 A CN101251623 A CN 101251623A
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Abstract
The invention discloses a welding device for photonic crystal fiber and a method thereof. A frequency controller (13) of a carbon dioxide laser modulating unit (8), a stress sensor demodulating unit (11) and a three-dimensional alignment controller and a clamp control unit (10) are connected with a processing and control element (9) of the welding device; mechanical transmission mechanisms of a lower three-dimensional motion V-shaped groove device (2) and an upper three-dimensional motion V-shaped groove device (5) are connected with the three-dimensional alignment controller and the three-dimensional alignment controller of the clamp control unit (10); the carbon dioxide laser modulating unit (8) transmits laser to a fiber output point (4) through a transmitting energy fiber (16) to weld a welded fiber (3). The method comprises the following steps of: 1) selecting a welding parameter according to information of a fiber structure; 2) adjusting a clamping force of the V-shaped groove clamp by using the information of the fiber structure; 3) performing a three-dimensional alignment to two fibers to be welded; 4) modulating a carbon dioxide laser by a frequency modulator with a set frequency to transmit laser to the position of welded fibers for welding through the transmitting energy fiber. The welding device for the photonic crystal fiber has the advantages of simple structure, strong capability of anti-interference of vibration, high sensitivity and easy manufacture, and is suitable for welding between photonic crystal fibers with different specifications and between the photonic crystal fiber and a conventional optical fiber.
Description
Technical field
The present invention relates to a kind of photon crystal optical fiber fusion splicing technical field, particularly relate to a kind of fusion splicing devices and method thereof of photonic crystal fiber.
Background technology
Photonic crystal fiber came out in Britain in 1996, this kind optical fiber has the unexistent unusual characteristic of a lot of ordinary optic fibres, as high non-linearity, chromatic dispersion controllability, high birefringence, unlimited unimodular property or the like, can be widely used for fields such as communication, imaging, spectroscopy and biomedicine, its performance study and application and development are the focuses of international photoelectron industry always.And the photon crystal optical fiber fusion splicing technology that is that all right is ripe, still be in the pilot study stage, become the practical problems that must solve in the photonic crystal fiber application and development.
Existing ordinary optic fibre heat sealing machine and Polarization Maintaining Optical Fiber Fusion Splicer all can not high-quality be finished the welding of photonic crystal fiber automatically, and the subject matter of existence has: 1, be easy to cause when welding subsiding of photonic crystal fiber covering airport; 2, be easy to generate bubble during the welding large aperture optical fiber; 3, can't realize welding control of energy accurately.
The research of using carbon dioxide laser welding photonic crystal fiber is also arranged at present, this kind method has center and the laser power that can accurately control laser beam, does not stay advantages such as any residue at weld, can reduce caving in of fibre cladding airport, reduce splice loss, splice attenuation, but the research of this kind method is only at the research that experimentizes of certain specific optical fiber, and can not to photonic crystal fiber radially the energy distribution of diverse location control, in fusion process, be difficult to the degree of caving in controlling packet layer of air hole.
Summary of the invention
In order to overcome the prior art above shortcomings, the invention provides a kind of fusion splicing devices and method thereof of photonic crystal fiber, this invention can realize the energy control of photon crystal optical fiber fusion splicing process, thereby caving in of control fibre cladding airport, high-quality is finished between photonic crystal fiber and the conventional fiber and the welding between photonic crystal fiber and the photonic crystal fiber.
The technical solution adopted for the present invention to solve the technical problems is: the fusion splicing devices of this photonic crystal fiber and method thereof comprise fusion splicing devices and welding process two parts thereof of photonic crystal fiber:
The fusion splicing devices of described photonic crystal fiber comprises modulation carbon dioxide laser unit 8, three-dimensional motion V-type slot device (2,5), strain gauge demodulating unit 11, three-dimensional alignment controller and anchor clamps control module 10 and processing and control element (PCE) 9.The processing and control element (PCE) 9 of this device is connected with frequency controller, strain gauge demodulating unit 11, three-dimensional alignment controller and the anchor clamps control module 10 of modulation carbon dioxide laser unit 8, to realize the control of said units and obtaining of stress information.The mechanical transmission mechanism of three-dimensional motion V-type slot device (2,5) is connected with the three-dimensional alignment controller of three-dimensional alignment controller and anchor clamps control module 10, and processing and control element (PCE) 9 is realized the aligning of optical fiber by three-dimensional collimator controller is controlled it.Processing and control element (PCE) 9 is by the anchor clamps control module control fiber clamp of three-dimensional alignment controller and anchor clamps control module 10, optical fiber is carried out clamping, upper and lower strain gauge (1,7) is responded to the size of holding force in real time, upper and lower strain gauge (1,7) links to each other with strain gauge demodulating unit 11, the size of power is fed back to processing and control element (PCE) 9 carry out the adjustment of further holding force, finish the control of holding force size with this closed loop.Modulation carbon dioxide laser unit 8 is sent to optical fiber fusion place 4 by energy-transmission optic fibre 16 with laser.This device is realized the three-dimensional control of optical fiber fusion by three-dimensional motion device, realize the modulation of laser instrument by modulation controller, thereby energy, wavelength and the weld time of control laser instrument, to realize the distribution of energy, wavelength and weld time in the different size photon crystal optical fiber fusion splicing process, the degree of subsiding of photonic crystal fiber covering airport realizes the low-loss welding in the control fusion process.
The welding process of described photonic crystal fiber is: the upper and lower photonic crystal fiber (3,6) of welding is clamped in the V-type groove fiber clamp of three-dimensional motion V-type slot device (2,5) of described fusion splicing devices.Afterwards, obtain photonic crystal fiber end face structure information before the welding by three-dimensional microscopic imaging device, described end face structure information comprises size, airport spacing and the airport number of plies of the size of fibre core and shape, covering airport, select the welding parameter with this structural information, described welding parameter comprises modulating frequency, laser wavelength, laser power, weld time and welding number of times etc.The photonic crystal fiber end face structure information that utilization is obtained is determined its maximum holding capacity, adjusts the holding force size of V-type groove fiber clamp then, make its can be very to be held, do not destroy the structure of fibre cladding airport again.After photonic crystal fiber is held, two optical fiber fusion is carried out three-dimensional aim at; Determine the parameters such as modulating frequency of its welding institute energy requirement size, weld time, modulator behind the aligning again according to the fiber end face structural information of obtaining, remove to modulate carbon dioxide laser with the modulator that configures output frequency, make carbon dioxide laser 14 outputs be divided into the identical laser beam of three beams by one minute three photo-coupler 15, light transmission is carried out welding to the molten optical fiber 3 of 4 pairs of quilts of optical fiber output point by energy-transmission optic fibre 16.
Described modulation controller 13 utilizes integrated circuit FPGA XC3S500E to finish, and produces modulation signal, the control output power of laser of different frequency.
Described photo-coupler 15 is used to finish the coupling of light between laser instrument and the energy-transmission optic fibre.The light of laser instrument output is adjusted to the uniform collimated laser beam of energy distribution by the optical device in the photo- coupler 15, and 3 energy-transmission optic fibres 16 are evenly arranged in the collimated laser beam, and laser is coupled in the energy-transmission optic fibre 16 uniformly.
Described processing and control element (PCE) 9 is made of the SEED-Davinci digital platform, and this platform is integrated double-core ARM9+DM64X has Digital Image Processing function and characteristics such as control ability in real time, and Based Intelligent Control and computational analysis are all finished by it.
The invention has the beneficial effects as follows: adopt carbon dioxide laser as the welding energy, can avoid staying any pollution and residue, avoid being fused optical fiber and become fragile, accurately its beam shape of control and center and output power at weld; Adopt modulation controller modulation carbon dioxide laser, can realize the distribution of energy in optical fiber fusion by changing modulating frequency; Adopt three-dimensional micro imaging system to obtain the end face information of optical fiber fusion, select different welding mathematical models for use, thereby select suitable parameters such as welding power, modulating frequency and weld time according to the difference of end face structure parameter; Can control caving in of fibre cladding air to the full extent, make the splice loss, splice attenuation minimum.Of the present invention simple in structure, vibration and interference resistance is strong, and is highly sensitive, easy to manufacture, is applicable to the welding between photonic crystal fiber of the same type and the dissimilar photonic crystal fiber.
Description of drawings
Fig. 1 is the structural representation of the fusion splicing devices of photonic crystal fiber;
Fig. 2 is a V-type groove structural representation;
Fig. 3 is the modulated laser structure synoptic diagram;
Fig. 4 is a photonic crystal fiber end face geometry synoptic diagram.
In above-mentioned accompanying drawing, 1. descend strain gauge, 2. descend three-dimensional motion V-type slot device, 3. descend photonic crystal fiber, 4. the energy-transmission optic fibre output point, 5. go up three-dimensional motion V-type slot device, 6. go up photonic crystal fiber, 7. upper stress sensor, 8. modulation carbon dioxide laser unit, 9. processing and control element (PCE), 10. three-dimensional alignment controller and anchor clamps control module, 11. strain gauge demodulating units, 12. fiber clamps, 13. frequency controller, 14. carbon dioxide laser, 15. photo-couplers, 16. energy-transmission optic fibres, 17. core centre is to the radius of airport layer, 18. core centre, 19. optical fiber jackets, 20. optical fiber airport layers, 21. core centre is to the radius of surrounding layer, 22. fiber core radius.
Embodiment
Embodiment
1. upper and lower photonic crystal fiber (3, the 6) specification of welding is: spot size is 7.5 μ m, and core diameter is 10.9 μ m, and pitch of holes is 3 μ m, and the airport diameter is 2 μ m, and the airport number of plies is 6 layers.The upper and lower photonic crystal fiber (3,6) of welding is installed on the upper and lower three-dimensional motion V-type slot device (2,5).
2. according to following, last photonic crystal fiber (3,6) structural parameters pass through down, upper stress sensor (1,7), strain gauge demodulating unit 11, the FEEDBACK CONTROL of the anchor clamps control module of three-dimensional alignment controller and anchor clamps control module 10 is adjusted under 12 pairs of the fiber clamps automatically, last photonic crystal fiber (3,6) holding force, the maximum pressure that this kind photonic crystal fiber can bear is 0.09N/ μ m, the holding force of using among the embodiment is 0.05N/ μ m, can avoid photonic crystal fiber destroyed in clamping process, can guarantee down again simultaneously, last photonic crystal fiber (3,6) can relative motion in three dimensions.
3. under realizing under the processing of processing and control element (PCE) 9, last photonic crystal fiber (3,6) three-dimensional is aimed at, by to down, last photonic crystal fiber (3,6) end face structure is analyzed (see figure 4), according to the photonic crystal fiber fibre core, the covering airport, the radius of surrounding layer and covering airport size, the number of plies, these parameters of pitch of holes obtain the following of welding, last photonic crystal fiber (3,6) required laser beam, energy, parameters such as modulating frequency, for photonic crystal fiber in the present embodiment, the laser power that need apply is 10W, modulating frequency changes between 50～100Hz according to the difference of each weld time, beam diameter is approximately 500～600 μ m, under 8 pairs of processing and control element (PCE) 9 control modulation carbon dioxide laser unit, last photonic crystal fiber (3,6) carries out welding.Remove to modulate carbon dioxide laser 14 with the frequency controller 13 that configures output frequency, make carbon dioxide laser 14 outputs be divided into the identical laser beam of three beams by one minute three photo-coupler 15, by energy-transmission optic fibre 16 light transmission to three an optical fiber output point 4 is being carried out welding, three optical fiber output point 4 distribution angles are 120 ° of (see figure 3)s.Laser instrument output energy just can be controlled at upper and lower photonic crystal fiber (3 by the modulating frequency that changes frequency controller 13 in modulation carbon dioxide laser unit 8,6) NE BY ENERGY TRANSFER in, make the temperature of photonic crystal fiber fibre core and surrounding layer higher than the temperature of airport layer, also can control simultaneously the Temperature Distribution time of airport layer, thus airport deformation degree during control welding photonic crystal fiber.
4. after the selection parameter, begin optical fiber is carried out welding, at first use modulating frequency to be the direct prolonged exposure 1s of the light beam of 50Hz, remove the impurity particle on the optical fiber; Use modulating frequency to be the light beam irradiates of 80Hz 3 times then, each time is 2s; Last is the light beam prolonged exposure 1s of 50Hz again with modulating frequency, the impurity after the removing welding, and the splice loss, splice attenuation that records at last is 0.05dB.
Laser power is constant, and the line size is constant, changes the modulating frequency of laser into 150Hz, and same optical fiber is carried out welding, still uses modulating frequency to be the direct prolonged exposure 1s of the light beam of 50Hz, removes the impurity particle on the optical fiber.
Re-use modulating frequency and be the light beam irradiates 3 times of 150Hz, each time is 2s; Last is the light beam prolonged exposure 1s of 50Hz again with modulating frequency, impurity after the removing welding, the splice loss, splice attenuation that records at last is 1.5dB, splice loss, splice attenuation is bigger, cause the covering airport to have significantly by the image welding this time of observing welding point and subside, this is the main cause that causes this splice loss, splice attenuation excessive.
Claims (8)
1. the fusion splicing devices of a photonic crystal fiber is characterized in that: processing and control element (PCE) (9) is connected with frequency controller (13), strain gauge demodulating unit (11), three-dimensional alignment controller and the anchor clamps control module (10) of modulation carbon dioxide laser unit (8); Upper and lower three-dimensional motion V-type slot device (2,5) mechanical transmission mechanism is connected with the three-dimensional alignment controller of three-dimensional alignment controller and anchor clamps control module (10), processing and control element (PCE) (9) is connected with the three-dimensional alignment controller of three-dimensional alignment controller and anchor clamps control module (10), realizes the aligning of optical fiber; Processing and control element (PCE) (9) carries out clamping by the anchor clamps control module control fiber clamp of three-dimensional alignment controller and anchor clamps control module (10) to optical fiber; Processing and control element (PCE) (9) is connected with strain gauge demodulating unit (11), and strain gauge demodulating unit (11) and upper and lower strain gauge (1,7) connect; Modulation carbon dioxide laser unit (8) is sent to optical fiber output point (4) to being carried out welding by molten optical fiber (3) by energy-transmission optic fibre (16) with laser.
2. the fusion splicing devices of photonic crystal fiber according to claim 1, it is characterized in that: the signal wire that upper and lower three-dimensional motion V-type slot device (2,5) mechanical transmission mechanism is drawn connects the three-dimensional alignment controller of three-dimensional alignment controller and anchor clamps control module (10).
3. the fusion splicing devices of photonic crystal fiber according to claim 2, it is characterized in that: upper and lower three-dimensional motion V-type slot device (2,5) V-type groove (2) is equipped with strain gauge (3) and optical fiber clamping plate (12), upper and lower photonic crystal fiber (3,6) be clamped in respectively in the upper and lower three-dimensional motion V-type slot device (2,5).
4. the fusion splicing devices of photonic crystal fiber according to claim 1, it is characterized in that: modulation carbon dioxide laser unit (8) is made up of frequency controller (13), carbon dioxide laser (14), photo-coupler (15) and energy-transmission optic fibre (16), one minute three photo-coupler (15) make carbon dioxide laser output be divided into the identical laser of three beams to be transferred to three optical fiber output points (4) by energy-transmission optic fibre (16), three optical fiber output points (4) distribution angle is 120 °.
5. the welding process of the fusion splicing devices of the described photonic crystal fiber of claim 1 is characterized in that: said method comprising the steps of:
1) the upper and lower photonic crystal fiber (3,6) of welding is clamped in the V-type groove fiber clamp of upper and lower three-dimensional motion V-type slot device (2,5) of described fusion splicing devices;
2) three-dimensional microscopic imaging device obtains the structural information of the preceding photonic crystal fiber end face of welding, selects the welding parameter with this structural information;
3) utilize the end face structure information of photonic crystal fiber to determine its maximum holding capacity, adjust upper and lower three-dimensional motion V-type slot device (2 then, the holding force size of V-type groove fiber clamp (12) 5), make its can be very to be held, do not destroy the structure of fibre cladding airport again;
4) after photonic crystal fiber is held, two optical fiber fusion is carried out three-dimensional aim at;
5) determine the modulating frequency parameter of its welding institute energy requirement size, weld time, modulator after aiming at again according to the fiber end face structural information of obtaining;
6) remove to modulate carbon dioxide laser (14) with the frequency controller (13) that configures output frequency, by one minute three photo-coupler (15) make carbon dioxide laser output be divided into the identical laser of three beams, by energy-transmission optic fibre light transmission is carried out welding to melting the optical fiber place.
6. the welding process of modulation type photonic crystal fiber according to claim 5 is characterized in that: described photonic crystal fiber end face structure information comprises size, airport spacing and the airport number of plies of the size of fibre core and shape, covering airport; Select the welding parameter with this structural information, described welding parameter comprises modulating frequency, laser wavelength, laser power and weld time and welding number of times.
7. the welding process of modulation type photonic crystal fiber according to claim 5, it is characterized in that: under the structural parameters of photonic crystal fiber (3) and last photonic crystal fiber (6) pass through down, upper stress sensor (1,7), strain gauge demodulating system (11), the FEEDBACK CONTROL of the anchor clamps control module of three-dimensional alignment controller and anchor clamps control module (10) is adjusted fiber clamp (12) automatically to following, last photonic crystal fiber (3,6) holding force, make its can be very to be held, do not destroy the structure of fibre cladding airport again, can guarantee down again simultaneously, last photonic crystal fiber (3,6) can relative motion in three dimensions.
8. the welding process of modulation type photonic crystal fiber according to claim 5, it is characterized in that: under the processing of processing and control element (PCE) (9), to upper and lower photonic crystal fiber (3,6) carrying out is three-dimensional to be aimed at, aiming at the back passes through upper and lower photonic crystal fiber (3,6) structure analysis obtains welding to the required laser beam of upper and lower photonic crystal fiber (3,6), energy and modulating frequency parameter.
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| CN101571611B (en) * | 2009-06-05 | 2011-05-18 | 阮双琛 | All-fiber coupling implementation device and method of photonic crystal fiber |
| CN102419462A (en) * | 2011-12-08 | 2012-04-18 | 燕山大学 | Optical fiber fusion point heating device |
| CN102567745A (en) * | 2011-12-29 | 2012-07-11 | 北京航天时代光电科技有限公司 | Automatic detection method of optical fiber fusion quality |
| CN102590946A (en) * | 2012-03-31 | 2012-07-18 | 成都捷康特科技有限公司 | Method for welding fibers by using cutting positioning type fiber welding machine |
| CN103837933A (en) * | 2012-11-21 | 2014-06-04 | 武汉拓尔奇光电技术有限公司 | Method for carrying out coating stripping, end face processing and fused fiber splice through laser galvanometers |
| CN104297849A (en) * | 2014-11-06 | 2015-01-21 | 成磊 | Welding method for photonic crystal fibers |
| CN105676362A (en) * | 2016-04-19 | 2016-06-15 | 安徽理工大学 | Optical fiber fusion splicing method and device thereof |
| CN106443885A (en) * | 2016-07-05 | 2017-02-22 | 中国航空工业集团公司西安飞行自动控制研究所 | Method of realizing low-loss welding of pohotonic crystal fiber and solid fiber |
| CN110501782A (en) * | 2019-07-27 | 2019-11-26 | 复旦大学 | A kind of low-loss of large mode area pcf, high-intensitive welding process |
| CN112719585A (en) * | 2020-12-16 | 2021-04-30 | 深圳市讯泉科技有限公司 | Fusion control method, device, equipment and computer readable storage medium |
| CN117724209A (en) * | 2024-02-08 | 2024-03-19 | 苏州英谷激光有限公司 | Butt joint method suitable for large-mode-field polarization-maintaining photonic crystal fiber |
| CN117948883A (en) * | 2024-01-31 | 2024-04-30 | 江苏宇特光电科技股份有限公司 | Fusion power detection method for optical fiber end face |
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| CN101571611B (en) * | 2009-06-05 | 2011-05-18 | 阮双琛 | All-fiber coupling implementation device and method of photonic crystal fiber |
| CN102419462A (en) * | 2011-12-08 | 2012-04-18 | 燕山大学 | Optical fiber fusion point heating device |
| CN102567745A (en) * | 2011-12-29 | 2012-07-11 | 北京航天时代光电科技有限公司 | Automatic detection method of optical fiber fusion quality |
| CN102567745B (en) * | 2011-12-29 | 2013-10-16 | 北京航天时代光电科技有限公司 | Automatic detection method of optical fiber fusion quality |
| CN102590946A (en) * | 2012-03-31 | 2012-07-18 | 成都捷康特科技有限公司 | Method for welding fibers by using cutting positioning type fiber welding machine |
| CN102590946B (en) * | 2012-03-31 | 2013-05-01 | 成都捷康特科技有限公司 | Method for welding fibers by using cutting positioning type fiber welding machine |
| CN103837933A (en) * | 2012-11-21 | 2014-06-04 | 武汉拓尔奇光电技术有限公司 | Method for carrying out coating stripping, end face processing and fused fiber splice through laser galvanometers |
| CN103837933B (en) * | 2012-11-21 | 2016-03-02 | 武汉拓尔奇光电技术有限公司 | A kind of laser galvanometer mode shell cover, the method for end face processing, welding optical cable |
| CN104297849B (en) * | 2014-11-06 | 2017-04-19 | 成磊 | Welding method for photonic crystal fibers |
| CN104297849A (en) * | 2014-11-06 | 2015-01-21 | 成磊 | Welding method for photonic crystal fibers |
| CN105676362A (en) * | 2016-04-19 | 2016-06-15 | 安徽理工大学 | Optical fiber fusion splicing method and device thereof |
| CN106443885A (en) * | 2016-07-05 | 2017-02-22 | 中国航空工业集团公司西安飞行自动控制研究所 | Method of realizing low-loss welding of pohotonic crystal fiber and solid fiber |
| CN106443885B (en) * | 2016-07-05 | 2019-02-15 | 中国航空工业集团公司西安飞行自动控制研究所 | A method of realizing photonic crystal fiber and solid core fibres low loss welding |
| CN110501782A (en) * | 2019-07-27 | 2019-11-26 | 复旦大学 | A kind of low-loss of large mode area pcf, high-intensitive welding process |
| CN112719585A (en) * | 2020-12-16 | 2021-04-30 | 深圳市讯泉科技有限公司 | Fusion control method, device, equipment and computer readable storage medium |
| CN112719585B (en) * | 2020-12-16 | 2022-06-17 | 深圳市讯泉科技有限公司 | Fusion splicing control method, device, equipment and computer readable storage medium |
| CN117948883A (en) * | 2024-01-31 | 2024-04-30 | 江苏宇特光电科技股份有限公司 | Fusion power detection method for optical fiber end face |
| CN117948883B (en) * | 2024-01-31 | 2024-08-23 | 江苏宇特光电科技股份有限公司 | Fusion power detection method for optical fiber end face |
| CN117724209A (en) * | 2024-02-08 | 2024-03-19 | 苏州英谷激光有限公司 | Butt joint method suitable for large-mode-field polarization-maintaining photonic crystal fiber |
| CN117724209B (en) * | 2024-02-08 | 2024-06-04 | 苏州英谷激光科技股份有限公司 | Butt joint method suitable for large-mode-field polarization-maintaining photonic crystal fiber |
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