CN201955492U - Doubly clad optical fiber laser coupling device - Google Patents
Doubly clad optical fiber laser coupling device Download PDFInfo
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- CN201955492U CN201955492U CN2010206139138U CN201020613913U CN201955492U CN 201955492 U CN201955492 U CN 201955492U CN 2010206139138 U CN2010206139138 U CN 2010206139138U CN 201020613913 U CN201020613913 U CN 201020613913U CN 201955492 U CN201955492 U CN 201955492U
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Abstract
The utility model relates to the field of optical fiber transmission, and aims to provide a doubly clad optical fiber laser coupling device, which comprises a doubly clad optical fiber. The doubly clad optical fiber is formed by coupling inner sides of a cored optical fiber area and a coreless optical fiber area, while the cored optical fiber area and the coreless optical fiber area are tightly and parallelly arranged. The coreless optical fiber area is connected with an external power transmission optical fiber, and a laser pump is arranged at the other end of the power transmission optical fiber. One of two inner cladding areas of the optical fiber is used for obtaining laser, the other inner cladding area is used as a pump, and thereby semiconductor pump laser in the power transmission optical fiber is coupled to the inner claddings of the doubly clad optical fiber. The doubly clad optical fiber laser coupling device has the advantages that coupling power is high, a plurality of pump power transmission optical fibers can be connected to one doubly clad optical fiber, and the like, is capable of achieving multi-point coupling, and is applied to high-power optical fiber lasers or amplifiers.
Description
Technical field:
The utility model relates to the Optical Fiber Transmission field, particularly doubly clad optical fiber and be used for laser coupled device between the energy-transmission optic fibre of pumping laser in high-capacity optical fiber laser or the amplifier.
Background technology:
In powerful fiber laser and fiber amplifier, need the semiconductor pumped 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 the first collimation of the laser in the energy-transmission optic fibre, focus on then in the inner cladding of coupled into double-clad fiber on the end face of doubly clad optical fiber.Directly the method for welding is that pad always produces certain loss, and 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.Method with discrete optical element coupling is risen by doubly clad optical fiber end face temperature, and end face can be destroyed during as the arrival laser-damaged threshold value, limited the coupling of pumping laser between optical fiber.
Summary of the invention:
The purpose of this utility model is in order to overcome deficiency of the prior art, a kind of laser coupled device that reduces the restriction of fiber end face laser-damaged threshold value is provided, can carry out pumping at the energy-transmission optic fibre of welding more than 2 on the position on the inner cladding of a doubly clad optical fiber, connect by multistage optical fiber, realize a plurality of somes pumpings, avoided concentrating very big laser power, improved laser greatly and can obtain power at fiber end face.
Specifically, technical solution of the present utility model is as follows:
A kind of double-cladding fiber laser coupling device comprises a doubly clad optical fiber, and described doubly clad optical fiber is formed by the inner side coupling scheme by 2 close parallel have core fibre district and coreless fiber districts arranged side by side; Described coreless fiber district links to each other with external energy-transmission optic fibre, and the other end of described energy-transmission optic fibre is provided with laser light pump.
As further improvement of the utility model, described energy-transmission optic fibre has 2, is connected on respectively on the two ends in described coreless fiber district.
As further improvement of the utility model, described coreless fiber is divided into more than 2 sections, and every section two ends all are connected to described energy-transmission optic fibre respectively and link to each other.
As further improvement of the utility model, described doubly clad optical fiber constitutes by linking to each other more than at least 2 sections, and the end face that the core fibre district is arranged of each section links to each other in twos, and the coreless fiber district of each section links to each other in twos with the end face of external described energy-transmission optic fibre respectively.
As further improvement of the utility model, the described opposing end faces that is connected in twos polishes the back laser bonding and links to each other.
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, and fibre core is the single-mode optics fibre core less than 10 micron dimensions, is the multimode fibre core greater than 10 micron dimensions.
As further improvement of the utility model, described the cross section in core fibre district and coreless fiber district is arranged is polygon, as long as there is a plane in 2 zones, just can combine closely in 2 zones.Generally mostly be sexangle or octagon, because sexangle and anise be relatively near circular, therefore can be better and external circular energy-transmission optic fibre welding.
As further improvement of the utility model, described laser light pump is the semiconductor laser optical pumping that has tail optical fiber.
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 can be applied in high-capacity optical 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 double-cladding fiber laser coupling device.
Fig. 2 is the cut-open view of the doubly clad optical fiber end face among Fig. 1.
Fig. 3 is a 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:
Shown in Figure 1 is double-cladding fiber laser coupling device of the present utility model, comprise a doubly clad optical fiber, this doubly clad optical fiber can see clearly in Fig. 2 that in the inside of coat 4 being is hexagonally to have core fibre district 1 and coreless fiber district 2 close parallel ground to arrange to constitute by 2 cross sections, the core that core fibre district 1 is wherein arranged is the fibre core 3 that is mixed with rare earth, and the two can form the transmission of inner side coupling scheme like this.
In Fig. 1, the two ends in coreless fiber district 2 respectively are circumscribed with an energy-transmission optic fibre 6, and the other end of this energy-transmission optic fibre 6 is provided with a semiconductor laser optical pumping 8 that has tail optical fiber; During making, be earlier doubly clad optical fiber to be removed a bit of coat 4 on the position of an outer end, make the short as far as possible and closely contact of exposed part, generally no longer than 10 centimetres, again 2 clad regions are separated from each other, be formed with mix rare earth core fibre district 1 and coreless fiber district 2 arranged; The end that will be used for the energy-transmission optic fibre 6 of pumping semiconductor laser then, also remove a bit of coat 5, be formed with the end, then the exposed coreless fiber of doubly clad optical fiber district 2 is polished and abuts against with energy-transmission optic fibre 6 exposed fibre core end faces, adopt laser welding method, on the surface of contact of two optical fiber, produce fused layers 7, like this can be with semiconductor pumped laser coupled to having in the core fibre district 1 and forming laser by energy-transmission optic fibre 6.
As shown in Figure 3, for example as a full fiberize fiber laser of output laser power 10W, the core diameter of the doubly clad optical fiber after the fiber grating 9 is 20 μ m, the inner cladding diameter is 200 μ m, the laser diode that needs two 10W is as optical pumping 8, and the output optical fibre of laser diode optical pumping 8 is the energy-transmission optic fibre of 200 μ m.In the place of doubly clad optical fiber near fiber grating, keep at a certain distance away and remove two sections surrounding layers and coat respectively, also each removes one section coat respectively to the output terminal of 2 laser diode output optical fibres, then the 200 μ m fibre cores of removing coat are abutted against doubly clad optical fiber and remove on the inner cladding of coat, the surface of contact of two optical fiber is welded together with laser welding method.Make bigger fiber laser if desired, also can will on the position 10 of end face separately, weld respectively on 2 sections doubly clad optical fibers, can obtain more laser power, as obtaining 20W power with 2 sections optical fiber among the figure, wherein fiber grating and output end face are formed laser cavity.
Certainly the utility model double-cladding fiber laser coupling device of more segmentations can also be linked to each other one by one, to obtain more strong big laser power and transmission range.
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 domain of the present utility model.
Claims (7)
1. a double-cladding fiber laser coupling device comprises a doubly clad optical fiber, it is characterized in that, described doubly clad optical fiber is formed by the inner side coupling scheme by 2 close parallel have core fibre district (1) and coreless fiber district (2) arranged side by side; Described coreless fiber district (2) links to each other with external energy-transmission optic fibre (6), and the other end of described energy-transmission optic fibre (6) is provided with laser light pump (8).
2. double-cladding fiber laser coupling device according to claim 1 is characterized in that, described energy-transmission optic fibre (6) has 2, is connected on respectively on the two ends in described coreless fiber district (2).
3. double-cladding fiber laser coupling device according to claim 2 is characterized in that, described coreless fiber district (2) is divided into more than 2 sections, and every section two ends all are connected to described energy-transmission optic fibre (6) respectively and link to each other.
4. according to each described double-cladding fiber laser coupling device in the claim 1 to 3, it is characterized in that, described doubly clad optical fiber constitutes by linking to each other more than at least 2 sections, the end face that core fibre district (1) is arranged of each section links to each other in twos, and the coreless fiber district (2) of each section links to each other in twos with the end face of external described energy-transmission optic fibre (6) respectively.
5. double-cladding fiber laser coupling device according to claim 4 is characterized in that, the described opposing end faces that is connected in twos polishes the back laser bonding and links to each other.
6. double-cladding fiber laser coupling device according to claim 1 is characterized in that, described the cross section of core fibre district (1) and coreless fiber district (2) is arranged is polygon.
7. double-cladding fiber laser coupling device according to claim 1 is characterized in that, described laser light pump (8) is for having the semiconductor laser optical pumping of tail optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206139138U CN201955492U (en) | 2010-11-18 | 2010-11-18 | Doubly clad optical fiber laser coupling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206139138U CN201955492U (en) | 2010-11-18 | 2010-11-18 | Doubly clad optical fiber laser coupling device |
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| Publication Number | Publication Date |
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| CN201955492U true CN201955492U (en) | 2011-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010206139138U Expired - Fee Related CN201955492U (en) | 2010-11-18 | 2010-11-18 | Doubly clad optical fiber laser coupling device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102081195A (en) * | 2010-11-18 | 2011-06-01 | 杭州华威药业有限公司 | Device and method for coupling double cladding optical fiber laser |
| CN103056513A (en) * | 2012-12-14 | 2013-04-24 | 武汉锐科光纤激光器技术有限责任公司 | Laser processing system |
| CN103633543A (en) * | 2012-08-27 | 2014-03-12 | 福州高意通讯有限公司 | Multi-fiber laser gain system and fiber laser |
| CN103913804A (en) * | 2013-01-08 | 2014-07-09 | 江苏天元激光科技有限公司 | Long-distance weak-coupling optical fiber coupler and application thereof |
| CN109031527A (en) * | 2018-07-06 | 2018-12-18 | 江苏大学 | A kind of high-power fiber end cap and its manufacturing method |
| CN109286440A (en) * | 2018-10-11 | 2019-01-29 | 东南大学 | A kind of laser power supply based on doubly clad optical fiber and total road information back system |
-
2010
- 2010-11-18 CN CN2010206139138U patent/CN201955492U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102081195A (en) * | 2010-11-18 | 2011-06-01 | 杭州华威药业有限公司 | Device and method for coupling double cladding optical fiber laser |
| CN103633543A (en) * | 2012-08-27 | 2014-03-12 | 福州高意通讯有限公司 | Multi-fiber laser gain system and fiber laser |
| CN103633543B (en) * | 2012-08-27 | 2016-06-29 | 福州高意通讯有限公司 | A kind of many optical-fiber lasers gain system and optical fiber laser |
| CN103056513A (en) * | 2012-12-14 | 2013-04-24 | 武汉锐科光纤激光器技术有限责任公司 | Laser processing system |
| CN103056513B (en) * | 2012-12-14 | 2014-12-10 | 武汉锐科光纤激光器技术有限责任公司 | Laser processing system |
| CN103913804A (en) * | 2013-01-08 | 2014-07-09 | 江苏天元激光科技有限公司 | Long-distance weak-coupling optical fiber coupler and application thereof |
| CN109031527A (en) * | 2018-07-06 | 2018-12-18 | 江苏大学 | A kind of high-power fiber end cap and its manufacturing method |
| CN109031527B (en) * | 2018-07-06 | 2020-03-31 | 江苏大学 | High-power optical fiber end cap and manufacturing method thereof |
| CN109286440A (en) * | 2018-10-11 | 2019-01-29 | 东南大学 | A kind of laser power supply based on doubly clad optical fiber and total road information back 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: Device and method for coupling double cladding optical fiber laser Granted publication date: 20110831 License type: Exclusive License Record date: 20120409 |
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| 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. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110831 Termination date: 20181118 |