CN204256211U - A kind of low loss fiber mould field adaptation with the all-fiber peeling off function - Google Patents
A kind of low loss fiber mould field adaptation with the all-fiber peeling off function Download PDFInfo
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- CN204256211U CN204256211U CN201420652172.2U CN201420652172U CN204256211U CN 204256211 U CN204256211 U CN 204256211U CN 201420652172 U CN201420652172 U CN 201420652172U CN 204256211 U CN204256211 U CN 204256211U
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Abstract
Have a low loss fiber mould field adaptation for the all-fiber peeling off function, this adaptation comprises large mould field output optical fibre, single mode hot core expansion optical fiber, single mode delivery optical fiber, coat; Large mould field output optical fibre comprises large mould field output optical fibre fibre core, large mould field output optical fibre covering; Single mode hot core expansion optical fiber comprises hot core expansion fibre cladding, add thermal enlargement after fibre core; Single mode delivery optical fiber comprises single mode delivery optical fiber covering, single mode delivery optical fiber fibre core; Described hot core expansion fiber core left end is the left end portion that single mode hot core expansion adds the fibre core after thermal enlargement.The left end of described single mode hot core expansion optical fiber is connected with large mould field output optical fibre, and the other end and the single mode delivery optical fiber of single mode hot core expansion optical fiber are structure as a whole; Coat is arranged on the junction of single mode hot core expansion optical fiber left end and large mould field output optical fibre.This mould field adaptation achieves the all-fiber of fiber optic passive device, and the distinguishing feature such as it is little to have volume, and loss is low, cost is low, reliability is high.
Description
Technical field
The utility model relates to fiber laser field, particularly relates to a kind of optical fibre device with the low loss mode field matching feature of the all-fiber peeling off function.
Background technology
Along with developing rapidly of optical fiber technology, MOPA (Master OscillatorPower-Amplifier, master oscillation power amplification) structure obtains the main research approach of high-capacity optical fiber laser, the application of big mode field area fibers restrained effectively the adverse effect of nonlinear fiber and fiber end face damage, realize the Laser output of high power high pulse energy, accelerate the development of high-capacity optical fiber laser and amplifier.But also bring two problems: one is because large mould field optical fiber does not meet single mode condition, causes the reduction of output beam quality simultaneously; Two is high with little core optical fibers splice loss, splice attenuation.
Therefore how to realize big mode field area fibers to be connected with the low-loss of little core optical fibers, realize pattern match therebetween, and ensure the safety and stability of Optical Maser System at high power, and good beam quality is very challenging problem.
Current solution to this problem is generally space lens coupling method, fused biconical taper method, transition light nanofarads and hot core expansion facture.Space lens coupling method, complicated operation, complex structure, and its space structure adds instability and the complicacy of laser instrument, hinders the raising of output power, does not also meet the development trend of fiber ring laser system structure all-fiber; Optical fiber fused tapering technology, higher to accuracy requirement, draw the property symmetrically easily destroying fibre-optic waveguide structure in cone process, be not suitable for the fused fiber splice process that covering difference is less; Transition light nanofarads, is between two kinds of unmatched optical fiber in mould field, add a kind of transition optical fiber to reduce the loss between the optical fiber of optical mode field not of the same race, but have also been introduced insertion loss while adding transition optical fiber, add the instability of laser system; For two kinds of optical fiber that cladding diameter difference is less, the optical fiber less to core diameter directly adopts hot core expansion process, and simple to operate, with low cost, reliability is high.
Summary of the invention
The utility model provides a kind of low loss mode field adaptation with the all-fiber peeling off function, in order to solve at present the problem realizing the model field unbalance of big mode field area fibers and little core diameter single-mode optical fiber, achieve big mode field area fibers to be connected with the low-loss of little core diameter single-mode optical fiber, and ensure the safety and stability of Optical Maser System at high power, and good beam quality.
In order to solve the problems of the technologies described above, the utility model provides a kind of low loss mode field adaptation with the all-fiber peeling off function, comprises large mould field output optical fibre (10), hot core expansion optical fiber (20), single mode delivery optical fiber (30), coat (40); Large mould field output optical fibre (10) comprises large mould field output optical fibre fibre core (11), large mould field output optical fibre covering (12); Single mode hot core expansion optical fiber (20) comprises hot core expansion fibre cladding (21), add thermal enlargement after fibre core (22); Single mode delivery optical fiber (30) comprises single mode delivery optical fiber covering (31), single mode delivery optical fiber fibre core (32); The left end portion that described hot core expansion fiber core left end (23) is hot core expansion fiber core (22).
Described single mode hot core expansion optical fiber (20) left end is connected with large mould field output optical fibre (10), and the other end and the single mode delivery optical fiber (30) of single mode hot core expansion optical fiber (20) are structure as a whole; Coat (40) is arranged on the junction of single mode hot core expansion optical fiber left end (20) and large mould field output optical fibre (10).
The V value of described laser instrument large mould field output optical fibre (10) is greater than 2.405 and is less than 3.83; Described single mode hot core expansion optical fiber (20) utilizes heating directly to carry out hot core expansion process to single mode delivery optical fiber (30) end, fibre core (22) becomes large along fiber axis to expanding gradually, reaches and the mating of large mould field output optical fibre fibre core (12); Arc discharge is utilized directly large mould field output optical fibre (10) to be carried out welding with single mode hot core expansion optical fiber (20) place of coupling, the two coupling part self-assembling formation gradual change optical waveguide structure, achieves large mould field output optical fibre (10) and mates to the optical mode field of single mode delivery optical fiber (30); Then pass through single mode delivery optical fiber (30) by higher order mode filtering, obtain single-mode optics and export; Finally utilize high-index material to apply the fusion point of large mould field output optical fibre (10) with hot core expansion optical fiber left end (20), form one deck even coating layer (40).
Compared with prior art, the present invention has following beneficial effect.
The utility model achieves the optical fibre device of a kind of integrated stripping and mould field matching feature, and this optical fiber mode fields adaptation does not need the labyrinth of Space Coupling, directly achieves large mould field optical fiber and mates with the mould field of single-mode fiber.Relative to Space Coupling labyrinth, the loss that extra transition structure and the doping component of complexity bring, this mould field adaptation achieves the all-fiber of fiber optic passive device, and the distinguishing feature such as it is little to have volume, and loss is low, cost is low, reliability is high.
Simultaneously due to coat that the high-index material applied at large mould field optical fiber and single mode hot core expansion weld is formed, this mould field adaptation is made to have good stripping ability, light in covering can be peeled off, reduce the heat accumulation of fusion point, improve heat treatment capacity, ensure security and the reliability of laser system.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation with the low loss fiber mould field adaptation of the all-fiber peeling off function of embodiment of the present utility model;
Fig. 2 is the refractive index of single-mode fiber before heating in embodiment of the present utility model and the refractive index schematic diagram of the rear single mode hot core expansion optical fiber of heating.
Fig. 3 is the mode field diameter schematic diagram of single mode hot core expansion optical fiber after heating in embodiment of the present utility model;
In figure: 10, large mould field output optical fibre, 20, single mode hot core expansion optical fiber, 30, single mode delivery optical fiber, 40, coat, 11, large mould field output optical fibre fibre core, 12, large mould field output optical fibre covering, 21, hot core expansion fibre cladding, 22, add the fibre core after thermal enlargement, 23, hot core expansion fiber core left end, 31, single mode delivery optical fiber covering, 32, single mode delivery optical fiber fibre core.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, a kind of low loss fiber mould field adaptation with the all-fiber peeling off function of the utility model is described in further detail, in the hope of more clearly setting forth content of the present utility model.
As shown in Figure 1, there is a low loss mode field adaptation for the all-fiber peeling off function, comprise large mould field output optical fibre (10), single mode hot core expansion optical fiber (20), single mode delivery optical fiber (30), coat (40); Large mould field output optical fibre (10) comprises large mould field output optical fibre fibre core (11), large mould field goes out fibre cladding (12); Single mode hot core expansion optical fiber (20) comprises hot core expansion fibre cladding (21), add thermal enlargement after fibre core (22); Single mode delivery optical fiber (30) comprises single mode delivery optical fiber covering (31), single mode delivery optical fiber fibre core (32); Described hot core expansion fiber core left end (23) is for adding the left end portion of the fibre core after thermal enlargement (22).
The hot core expansion optical fiber left end (20) of described single mode hot core expansion optical fiber (20) is connected with large mould field output optical fibre (10), and the other end and the single mode delivery optical fiber (30) of hot core expansion optical fiber (20) are structure as a whole; Coat (40) is arranged on the junction of hot core expansion optical fiber left end (20) and large mould field output optical fibre (10).
The V value of described laser instrument large mould field output optical fibre (10) is greater than 2.405 and is less than 3.83; Described single mode hot core expansion optical fiber (20) utilizes heating directly to carry out hot core expansion process to single mode delivery optical fiber (30) end, hot core expansion fiber core (22) becomes large along fiber axis to expanding gradually, the fibre core left end (23) after adding thermal enlargement is reached with large mould field output optical fibre fibre core (12) and mates; Arc discharge is utilized directly large mould field output optical fibre (10) to be carried out welding with single mode hot core expansion optical fiber (20) place of coupling, the two coupling part self-assembling formation gradual change optical waveguide structure, realizes large mould field output optical fibre (10) and mates to the optical mode field of single mode hot core expansion optical fiber (20); Then pass through single mode delivery optical fiber (30) by higher order mode filtering, obtain single-mode optics and export; Finally utilize high-index material to apply the fusion point of large mould field output optical fibre (10) with single mode hot core expansion optical fiber left end (20), form one deck even coating layer (40).
Described single mode hot core expansion optical fiber (20) directly adds hot core expansion process to single mode delivery optical fiber (30) end, without the need to adding other components and parts or transition optical fiber, decreases complicacy and the instability of laser system.
Described single mode hot core expansion fiber core (22) forms gradual change conical region, and expand gradually along heating region, the heat time is longer, and fibre core expansion is more obvious.
Expand size by expansion to the heat time and heating and temperature control single mode hot core expansion fiber core, single mode hot core expansion fiber core left end (23) is mated completely with large mould field output optical fibre fibre core (12) right-hand member.
Described mould field adaptation is from large mould field output optical fibre (10) to single mode hot core expansion optical fiber (20), instead of from single mode delivery optical fiber (30) to large mould field output optical fibre (10).
The laser mode field diameter exported in described laser instrument large mould field output optical fibre fibre core (12) is greater than the laser mode field diameter of transmission in single mode delivery optical fiber fibre core (32).
Single-mode output optical fiber (10) does not support higher order mode, higher order mode can be peeled off effectively, obtains single-mode laser export finally by single mode delivery optical fiber (30).
The higher order mode light leaked in covering is peeled off by described coat (40), reduces the heat accumulation of the fusion point of large mould field output optical fibre (10) and single mode hot core expansion optical fiber (20) left end.
Embodiment
The V value of large mould field output optical fibre (10) of the laser instrument adopted in the present embodiment is greater than 2.405 and is less than 3.83, belongs to multimode optical fiber, there is higher order mode in fibre core.
Described a kind of low loss fiber mould field adaptation with the all-fiber peeling off function, also comprise single mode hot core expansion optical fiber (20), single mode hot core expansion optical fiber (20) is by covering (21) and add the fibre core after thermal enlargement (22) and form.Single mode hot core expansion optical fiber (20) directly adds hot core expansion process to single mode delivery optical fiber (30) end, without the need to adding other components and parts or transition optical fiber.
More specifically, in the present embodiment, the type of heating of single mode hot core expansion optical fiber (20) utilizes oxyhydrogen flame to heat, and other type of heating also can be selected to heat, such as arc heated, other modes such as high-temperature heater.Single mode hot core expansion optical fiber (20) its fibre core (22) part forms gradual change cone row region, and expand gradually along heating region, the heat time is longer, and fibre core expansion is more obvious.
Further illustrate, by regulating the parameter of oxyhydrogen flame, heat time, the parameters such as heated length in the present embodiment, ensure that single mode hot core expansion fiber core left end (23) reaches to mate completely with large mould field output optical fibre fibre core (12) right-hand member, the mould field coupling of both realizations.Fig. 2 is the refractive index of single-mode fiber before heating and the refractive index schematic diagram of the rear single mode hot core expansion optical fiber of heating.
Arc discharge is utilized directly large mould field output optical fibre (10) right-hand member and single mode hot core expansion optical fiber (20) left end to be carried out welding in the present embodiment, both realizations connect, coupling part self-assembling formation gradual change optical waveguide structure, realizes large mould field output optical fibre (10) and mates to the optical mode field of single mode delivery optical fiber (30).Wherein it should be noted that the mould field from large mould field output optical fibre (10) to single mode hot core expansion optical fiber (20) is mated, instead of mate from single-mode fiber (20) to the mould field of large mould field output optical fibre (10).The welding mode of the two can also adopt additive method.Fig. 3 heats the mode field diameter schematic diagram of rear single mode hot core expansion optical fiber.
The characteristic of higher order mode is by higher order mode filtering effectively to utilize single mode delivery optical fiber (30) not support in the present embodiment, obtains single-mode laser and exports.
Utilize the fusion point of high-index material to large mould field output optical fibre (10) right-hand member and hot core expansion optical fiber (20) left end to apply in the present embodiment, form one deck even coating layer (40).The higher order mode be leaked in covering is peeled off by the coat (40) that this high-index material is formed, reduce the heat accumulation of the fusion point of large mould field output optical fibre (10) right-hand member and hot core expansion optical fiber (20) left end, avoid optical fiber to cause damage because temperature is too high to optical fiber, affect the use of optical fiber and the stability of system.
Above to the utility model a kind ofly there is the low loss fiber mould field adaptation of all-fiber peeling off function be described in detail, apply specific case herein to set forth principle of the present utility model and embodiment, the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (6)
1. there is a low loss fiber mould field adaptation for the all-fiber peeling off function, it is characterized in that: this adaptation comprises large mould field output optical fibre (10), hot core expansion optical fiber (20), single mode delivery optical fiber (30), coat (40); Large mould field output optical fibre (10) comprises large mould field output optical fibre fibre core (11), large mould field output optical fibre covering (12); Single mode hot core expansion optical fiber (20) comprises covering (21), add thermal enlargement after fibre core (22); Single mode delivery optical fiber (30) comprises single mode delivery optical fiber covering (31), single mode delivery optical fiber fibre core (32); The left end portion that described hot core expansion fiber core left end (23) is hot core expansion fiber core (22);
Described single mode hot core expansion optical fiber (20) left end is connected with large mould field output optical fibre (10), and the other end and the single mode delivery optical fiber (30) of single mode hot core expansion optical fiber (20) are structure as a whole; Coat (40) is arranged on the junction of hot core expansion optical fiber (20) left end and large mould field output optical fibre (10);
The V value of described laser instrument large mould field output optical fibre (10) is greater than 2.405 and is less than 3.83; Described single mode hot core expansion optical fiber (20) utilizes heating directly to carry out hot core expansion process to single mode delivery optical fiber (30) end, fibre core (22) becomes large along fiber axis to expanding gradually, reaches and the mating of large mould field output optical fibre fibre core (12); Arc discharge is utilized directly large mould field output optical fibre (10) to be carried out welding with single mode hot core expansion optical fiber (20) place of coupling; Utilize high-index material to apply the fusion point of large mould field output optical fibre (10) with single mode hot core expansion optical fiber (20) left end, form one deck even coating layer (40).
2. a kind of low loss fiber mould field adaptation with the all-fiber peeling off function according to claim 1, is characterized in that: single mode hot core expansion optical fiber (20) directly adds hot core expansion process to single mode delivery optical fiber (30) end.
3. a kind of low loss fiber mould field adaptation with the all-fiber peeling off function according to claim 1, it is characterized in that: the fibre core (22) of described single mode hot core expansion optical fiber (20) forms gradual change conical region, expands gradually along heating region.
4. a kind of low loss fiber mould field adaptation with the all-fiber peeling off function according to claim 1, it is characterized in that: expand size by expansion to the heat time and heating and temperature control single mode hot core expansion fiber core, single mode hot core expansion fiber core left end (23) is mated completely with large mould field output optical fibre fibre core (12) right-hand member.
5. a kind of low loss fiber mould field adaptation with the all-fiber peeling off function according to claim 1, is characterized in that: described mould field adaptation is from large mould field output optical fibre (10) to single mode hot core expansion optical fiber (20).
6. a kind of low loss fiber mould field adaptation with the all-fiber peeling off function according to claim 1, is characterized in that: the laser mode field diameter exported in described laser instrument large mould field output optical fibre fibre core (12) is greater than the laser mode field diameter of transmission in single mode delivery optical fiber fibre core (32).
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| CN201420652172.2U CN204256211U (en) | 2014-11-04 | 2014-11-04 | A kind of low loss fiber mould field adaptation with the all-fiber peeling off function |
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| CN201420652172.2U CN204256211U (en) | 2014-11-04 | 2014-11-04 | A kind of low loss fiber mould field adaptation with the all-fiber peeling off function |
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| CN109799572A (en) * | 2018-12-12 | 2019-05-24 | 桂林电子科技大学 | A kind of Gauss-annular mould field adapter that fiber is integrated |
| CN110542949A (en) * | 2019-09-20 | 2019-12-06 | 光越科技(深圳)有限公司 | optical fiber manufacturing method and heating device for silicon optical waveguide connection and coupling |
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| CN111624701A (en) * | 2020-05-10 | 2020-09-04 | 桂林电子科技大学 | Multi-core optical fiber micro-collimator |
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| CN107765368B (en) * | 2017-10-13 | 2020-01-17 | 北京工业大学 | Welding method of hollow anti-resonance optical fiber |
| CN107765368A (en) * | 2017-10-13 | 2018-03-06 | 北京工业大学 | A kind of welding process of hollow antiresonance optical fiber |
| CN108333685A (en) * | 2018-02-24 | 2018-07-27 | 长飞光纤光缆股份有限公司 | A kind of welding process of single mode optical fiber and multimode fibre |
| CN112789534A (en) * | 2018-10-03 | 2021-05-11 | 鲁曼斯蒂有限公司 | Optical waveguide adapter assembly |
| US11960119B2 (en) | 2018-10-03 | 2024-04-16 | Microsoft Technology Licensing, Llc | Optical waveguide adapter assembly |
| CN111045151A (en) * | 2018-10-12 | 2020-04-21 | 深圳市杰普特光电股份有限公司 | Optical fiber mode field adapter, preparation method thereof and laser equipment |
| CN109799572A (en) * | 2018-12-12 | 2019-05-24 | 桂林电子科技大学 | A kind of Gauss-annular mould field adapter that fiber is integrated |
| CN110542949A (en) * | 2019-09-20 | 2019-12-06 | 光越科技(深圳)有限公司 | optical fiber manufacturing method and heating device for silicon optical waveguide connection and coupling |
| CN111290086A (en) * | 2020-02-25 | 2020-06-16 | 尚华 | Medical optical fiber guide wire converter |
| CN111965757A (en) * | 2020-05-10 | 2020-11-20 | 桂林电子科技大学 | Multi-core fiber fan-in fan-out beam splitter based on direct alignment coupling of collimated beams |
| CN111624701A (en) * | 2020-05-10 | 2020-09-04 | 桂林电子科技大学 | Multi-core optical fiber micro-collimator |
| CN112630888A (en) * | 2020-12-22 | 2021-04-09 | 光越科技(深圳)有限公司 | Mode field conversion system |
| CN113031156A (en) * | 2021-03-31 | 2021-06-25 | 湖南大科激光有限公司 | Optical fiber mode field adapter with cladding power stripping function and preparation method thereof |
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