CN201937160U - Low-power optical fiber laser device - Google Patents
Low-power optical fiber laser device Download PDFInfo
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- CN201937160U CN201937160U CN2011200314301U CN201120031430U CN201937160U CN 201937160 U CN201937160 U CN 201937160U CN 2011200314301 U CN2011200314301 U CN 2011200314301U CN 201120031430 U CN201120031430 U CN 201120031430U CN 201937160 U CN201937160 U CN 201937160U
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- optical fiber
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Abstract
The utility model relates to the field of optical fiber transmission and aims to provide a low-power optical fiber laser device. The device comprises a dual-cladding optical fiber formed by a core optical fiber zone and a coreless optical fiber zone tightly and parallelly arranged in an internal side coupling manner, wherein the coreless optical fiber zone is in fusion welding with an energy-transmitting optical fiber with a coating thereof removed; and a collimating lens used for converting divergent laser into parallel beam is arranged at one end of the core optical fiber zone, and the other end of the core optical fiber zone is in fusion welding with an FBG (Fiber Bragg Grating). In the utility model, the core optical fiber zone and the coreless optical fiber zone are effectively coupled, so that the optical fiber laser can obtain higher laser power; the device has a simple and compact structure, can be arranged in a small case, can be applied in the optical fiber laser device or an amplifier, can bear high-power laser, and can realize multi-point coupling.
Description
Technical field:
The utility model relates to the Optical Fiber Transmission field, specifically, is a kind of small-power fiber laser device.
Background technology:
In common fiber laser and fiber amplifier, need the pumping laser in the energy-transmission optic fibre be transferred in the inner cladding of doubly clad optical fiber.If the diameter of two optical fiber is identical or close, then directly the end face of two optical fiber is welded together, if the diameter difference of two optical fiber is bigger, then adopt discrete optical element straight, focus on then in the inner cladding of coupled into double-clad fiber on the end face of doubly clad optical fiber the calibration earlier of the laser in the energy-transmission optic fibre.Adopt the directly method of welding, because the optical fiber size is different, always produce certain loss at pad, therefore the tolerant laser power of pad is less than the damage threshold of optical fiber itself usually, and, the laser that produces in the fibre core of doubly clad optical fiber turns back in the energy-transmission optic fibre easily, causes the damage of the laser diode pumping source that links together with energy-transmission optic fibre; And the method that adopts discrete optical element to be coupled should be subjected to the restriction of the laser-damaged threshold value of doubly clad optical fiber end face, is subjected to the environmental impact of fiber work again.Present stage lacks a kind of small-power fiber laser device that the two can be integrally combined and occurs.
Summary of the invention:
The purpose of this utility model is in order to overcome deficiency of the prior art, a kind of compact low-power fiber laser device to be provided, avoided fiber end face should settle light optical grating reflection mirror, passing through the restriction of semiconductor optical pumping again; The utility model can also be applied to the pump light coupling in high-capacity optical fiber laser or the high-power fiber amplifier.
To achieve these goals, technical solution of the present utility model is as follows:
A kind of small-power fiber laser device comprises a doubly clad optical fiber, and described doubly clad optical fiber is formed by the inner side coupled modes by 2 close parallel have core fibre district and coreless fiber districts arranged side by side; Described coreless fiber district and the energy-transmission optic fibre welding of removing coat; Described have an end in core fibre district to be provided with the collimating lens that the laser that is used for dispersing becomes collimated light beam, the other end and fiber grating welding.
As further improvement of the utility model, described welding is the laser welding of carrying out after the opposing end surface of optical fiber polishes.
As further improvement of the utility model, described the core in core fibre district is arranged is the fibre core that is mixed with rare earth.
As further improvement of the utility model, described fibre core is single mode or multimode.
As further improvement of the utility model, described the cross section in core fibre district and coreless fiber district is arranged is polygon.
As further improvement of the utility model, described device is located in the sealing box.
As further improvement of the utility model, be provided with the small-sized air-cooled blower fan that is used to cool off in the described box.
The utility model device is the optical fiber with 2 inner cladding regions, one has the in-core clad region to obtain laser, an inner cladding region is as pumping, so that the semiconductor pumped laser coupled in the energy-transmission optic fibre is advanced in the inner cladding of doubly clad optical fiber, it is big to have coupled power, can connect characteristics such as a plurality of pumping energy-transmission optic fibres on a doubly clad optical fiber.Technical solution principle of the present utility model is: the one section surrounding layer and the coat of energy-transmission optic fibre and novel doubly clad optical fiber are removed, centreless inner cladding with energy-transmission optic fibre fibre core and novel doubly clad optical fiber welds then, the laser of its transmission is not because the refractive index of air much smaller than the refractive index of fiber optic materials, therefore can leak.The utility model has core district and centreless district effectively to be coupled by novel optical fiber, can make optical-fiber laser obtain higher laser power.The utility model is located in the capsule, and is simple and compact for structure, can be applied in fiber laser or the amplifier, and it is big to have the laser power that can bear simultaneously, can realize characteristics such as multiple spot coupling.
Description of drawings:
Fig. 1 is the structural representation of the utility model small-power fiber laser device.
Fig. 2 is a kind of specific embodiment of the present utility model.
Embodiment:
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:
As shown in Figure 1, doubly clad optical fiber 1 in the utility model is that polygonal core fibre district 3 and coreless fiber district 5 close parallel are arranged the arrangement constitutes by the cross section, the two forms the mode of inner side coupling and carries out the transmission of optical fiber, and the core that core fibre district 3 is wherein arranged is single mode or the multimode fibre core 8 that is mixed with rare earth; After removing one section coat 2, core fibre district 3 and coreless fiber district 5 will be arranged separately, allowed core fibre district 3 and fiber grating 4 weldings, coreless fiber district 5 and energy-transmission optic fibre 7 weldings of removing the semiconductor optical pumping 6 of coat; Have the other end in core fibre district 3 that collimating lens 9 is housed outward, the laser that is used for dispersing becomes collimated light beam; Whole device can be located in the box of a sealing, and the small-sized air-cooled blower fan 10 that is used to cool off semiconductor optical pumping 6 is installed in the box again.
Shown in Figure 2 the is fiber laser of the full fiberize of an output laser power 5W for example, with the doubly clad optical fiber of fiber grating 4 welding the diameter in core district 3 being arranged is 200 μ m, wire core diameter is 20 μ m.Coreless fiber district 5 needs 10W semiconductor laser diode (LD) as pumping source, and the tail optical fiber output optical fibre of this laser diode is the energy-transmission optic fibre 7 of diameter 200 μ m, coreless fiber district 5 welding of it and novel doubly clad optical fiber inner cladding.For fusion face 11,12, require to remove part coat to be welded respectively, and end face is polished, combine closely, with laser welding method two optical fiber are welded together, the pumping laser of laser diode output is just by in the inner cladding of this fusion face coupled into double-clad fiber.
Whole laser can be installed in a 5cm * 16.5cm * 16.5cm capsule, makes structure compact more.
At last, it is also noted that what more than enumerate only is a specific embodiment of the present utility model.Obviously, the utility model can also have many distortion, and all distortion that those of ordinary skill in the art can directly derive or associate from the disclosed content of the utility model all should be thought protection range of the present utility model.
Claims (7)
1. a small-power fiber laser device comprises a doubly clad optical fiber, it is characterized in that, described doubly clad optical fiber is formed by the inner side coupled modes by 2 close parallel have core fibre district (3) and coreless fiber district (5) arranged side by side; Described coreless fiber district (5) and energy-transmission optic fibre (7) welding of removing coat; Described have an end in core fibre district (3) to be provided with the collimating lens (9) that the laser that is used for dispersing becomes collimated light beam, the other end and fiber grating (4) welding.
2. small-power fiber laser device according to claim 1 is characterized in that, described welding is the laser welding of carrying out after the opposing end surface of optical fiber polishes.
3. small-power fiber laser device according to claim 1 is characterized in that, described the core in core fibre district (3) is arranged is the fibre core (8) that is mixed with rare earth.
4. small-power fiber laser device according to claim 3 is characterized in that, described fibre core (8) is single mode or multimode.
5. small-power fiber laser device according to claim 1 is characterized in that, described the cross section of core fibre district (3) and coreless fiber district (5) is arranged is polygon.
6. small-power fiber laser device according to claim 1 is characterized in that, described device is located in the sealing box.
7. small-power fiber laser device according to claim 6 is characterized in that, is provided with the small-sized air-cooled blower fan (10) that is used to cool off in the described box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200314301U CN201937160U (en) | 2011-01-28 | 2011-01-28 | Low-power optical fiber laser device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200314301U CN201937160U (en) | 2011-01-28 | 2011-01-28 | Low-power optical fiber laser device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201937160U true CN201937160U (en) | 2011-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200314301U Expired - Lifetime CN201937160U (en) | 2011-01-28 | 2011-01-28 | Low-power optical fiber laser device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201937160U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107561635A (en) * | 2017-10-13 | 2018-01-09 | 中国工程物理研究院激光聚变研究中心 | Gradual change absorption coefficient gain fibre and optical system |
| CN109085677A (en) * | 2017-06-14 | 2018-12-25 | 福州高意光学有限公司 | A kind of high-power optical-fiber coupling structure of ultralow Insertion Loss |
-
2011
- 2011-01-28 CN CN2011200314301U patent/CN201937160U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109085677A (en) * | 2017-06-14 | 2018-12-25 | 福州高意光学有限公司 | A kind of high-power optical-fiber coupling structure of ultralow Insertion Loss |
| CN107561635A (en) * | 2017-10-13 | 2018-01-09 | 中国工程物理研究院激光聚变研究中心 | Gradual change absorption coefficient gain fibre and optical system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Huawei Medical Article Co., Ltd., Hangzhou Assignor: Hangzhou Huawei Pharmaceutical Co., Ltd. Contract record no.: 2012330000156 Denomination of utility model: Low-power optical fiber laser device Granted publication date: 20110817 License type: Exclusive License Record date: 20120409 |
|
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 311400 No. 89 Golf Road, Fuyang District, Zhejiang, Hangzhou Patentee after: HANGZHOU HUAWEI PHARMACEUTICAL LLC Address before: 311400 No. 89 Golf Road, Hangzhou, Zhejiang, Fuyang Patentee before: Hangzhou Huawei Pharmaceutical Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110817 |