CN203312620U - End face protection structure of high-power laser optical fiber - Google Patents
End face protection structure of high-power laser optical fiber Download PDFInfo
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- CN203312620U CN203312620U CN2013202886728U CN201320288672U CN203312620U CN 203312620 U CN203312620 U CN 203312620U CN 2013202886728 U CN2013202886728 U CN 2013202886728U CN 201320288672 U CN201320288672 U CN 201320288672U CN 203312620 U CN203312620 U CN 203312620U
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Abstract
The utility model discloses an end face protection structure of a high-power laser optical fiber. The end face protection structure comprises the high-power laser optical fiber and a glass block which is fused with one end of the high-power laser optical fiber, wherein one end, which is fused with the high-power laser optical fiber, of the glass block is of a cone structure; the cone end face is of a circular or polygonal structure; and the area of the end face is equal to or greater than the area of the optical fiber. According to the end face protection structure, as one piece of conical glass block is fused with the high-power laser optical fiber, the damage to the optical fiber caused by the over-high laser power density generated on the output face of the laser is prevented; the taper of the glass block is greater than the divergence angle of a light beam output by the optical fiber, so that all lights output by optical fiber are transmitted inside the glass block; the size of the fine end of the glass block is small, so that the difficulty for fusion of the glass block and the optical fiber is reduced; the size of the end face of a thick end of the glass block is larger, so that an anti-reflection film is conveniently plated, and the unnecessary energy loss is reduced; and the structure is extremely suitable for the output end of the high-power optical fiber laser and is also suitable for a coupling input end or output end of a high-power semiconductor laser coupled with the optical fiber.
Description
Technical field
The utility model belongs to laser device field, is specifically related to a kind of end face protection structure of high power laser light optical fiber.
Background technology
Fiber laser is due to special gain waveguide structure, make high, the easy heat radiation of its gain, aspect the high power laser light of output high light beam quality, its unique advantage is being arranged, high-capacity optical fiber laser is very extensive in the application of the fields such as national defence, industry at present, but because fiber core is too thin, in optical fiber, the laser power density of transmission is high, makes fiber end face damage easily occur, and this is the major issue faced in the development of high-capacity optical fiber laser and application.
There are at present some safeguard procedures can increase face area, output end face is realized to certain protection; as a kind of method by one section extremely short, the fused fiber splice consistent with the fiber cladding diameter output to fiber laser; but this method is limited to the increase of face area, can not tackle the problem at its root.
Another kind method is that the columned glass blocks of a fritter and fiber end face are carried out to welding, the Output of laser of fiber laser transfers in air after first through columned glass blocks, being dissipated into large-size again, laser power density on air and medium contact face has obtained very large reduction, can effectively prevent output end face generation laser damage, but under this structure, the size of glass blocks and optical fiber differs larger, is difficult to carry out high-quality welding, on technique, is not easy to realize.
Summary of the invention
The purpose of this utility model is to design a kind of end face protection structure of high power laser light optical fiber, can effectively reduce the laser power density of output end face, and easily realize on technique, can guarantee repeatability and reliability, is suitable for industrialized large-scale production.
For achieving the above object, technical solution of the present utility model is:
A kind of end face of high power laser light optical fiber protection structure comprises: high power laser light optical fiber and be fused to the glass blocks of this high power laser light optical fiber one end; Wherein, an end of described glass blocks and high power laser light fused fiber splice is cone structure, the taper end of cone structure and fused fiber splice, this taper end end face be shaped as circle or polygonized structure.
Further, the cone angle of described glass blocks cone structure is greater than the beam divergence angle of optical fiber Output of laser.
The area of described glass blocks cone structure taper end end face equals or is slightly larger than the optical fiber area.
The end that described glass blocks is thicker is cylinder or prism.
The end face of the end that described glass blocks is thicker is coated with the anti-reflection film that can reduce the end face reflection loss.
The end that described glass blocks is thicker is used as the output of fiber laser or laser output or the input of high power laser light coupling device, and the face area size of this end is greater than the laser spot size at this place.
Described high power laser light optical fiber is fiber laser gain fibre used, or for laser, exports the passive energy-transmission optic fibre of coupling.
The utlity model has following advantage:
1, the contact-making surface of laser transmission medium and air is larger, and laser power density is low, can effectively avoid facet damage.
2, adopt glass blocks and optical fiber with cone angle to carry out welding, due to the size of the thinner end of the glass blocks with cone angle, near fibre diameter, reduced the welding difficulty, more easily realized on technique, can guarantee repeatability and reliability, be suitable for industrialized large-scale production.
3, larger with the thicker end end face of the glass blocks of cone angle, easily plated film, can effectively improve system effectiveness afterwards according to optical maser wavelength plating anti-reflection film.
The accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the structural representation of the utility model glass blocks embodiment mono-.
Fig. 3 is the structural representation of the utility model glass blocks embodiment bis-.
Fig. 4 is the structural representation of the utility model glass blocks embodiment tri-.
Embodiment
Referring to Fig. 1～Fig. 4, the end face of high power laser light optical fiber of the present utility model protection structure comprises: high power laser light optical fiber 1 and be fused to the glass blocks 2 of these high power laser light optical fiber 1 one ends; Described glass blocks 2 is cone structure with an end of high power laser light optical fiber 1 welding, taper end 21 and the fused fiber splice of cone structure, and the end surface shape of this taper end 21 can be circle, also can need to be processed as polygonized structure according to technique.
Further, the cone angle of described glass blocks 2 cone structures is greater than the beam divergence angle of optical fiber Output of laser.
The area of described glass blocks 2 cone structure taper end 21 end faces is equal to or greater than the optical fiber area.The end 22 that described glass blocks is thicker is cylinder or prism.
The end face of the end 22 that described glass blocks 2 is thicker is coated with the anti-reflection film that can reduce the end face reflection loss.
The end 22 that described glass blocks 2 is thicker is used as the output of fiber laser or laser output or the input of high power laser light coupling device, and this end face size is greater than the laser spot size at this place.
Described high power laser light optical fiber 1 is fiber laser gain fibre used, or for laser, exports the passive energy-transmission optic fibre of coupling.
Fig. 1 is preferably specific embodiment of the utility model one, high power laser light optical fiber adopts the LMA-YDF-20/400-M Yb-doped double-cladding optical fiber of Nufern, core diameter is 20 μ m, inner cladding diameter 400 μ m, numerical aperture 0.065, glass blocks adopting quartz glass with cone angle, cone angle taper end end face diameter 1mm, angle of taper 20, conical surface partial-length is 11mm, the face of cylinder is processed in glass blocks butt end side, column part length is 5mm, end face diameter 8mm, laser transmission during to glass blocks butt end end face spot diameter near 1.4mm, the laser power density of end is compared in optical fiber and has been reduced nearly 5000 times, effectively avoided the laser damage of end face.
Referring to Fig. 2～Fig. 4, it is depicted as the various embodiment of the utility model glass blocks 2, the butt end of glass blocks and taper end end face be processed into circle or the square but be not limited to this face type, polyhedral shape all can be processed in side, glass blocks two ends.
In sum, the utility model adopts a glass blocks with cone angle and optical fiber to carry out welding, the end size that glass blocks is thinner equals or is slightly larger than fibre diameter, be easier to carry out welding, the cone angle of glass blocks is greater than the acceptance angle of optical fiber, and laser energy is dissipated into large-size and can not escapes into outside glass blocks in glass blocks, this structure can effectively reduce the laser power density of output end face, and easily realize on technique, can guarantee repeatability and reliability, be suitable for industrialized large-scale production.
Claims (16)
1. the end face of high power laser light optical fiber protection structure comprises: high power laser light optical fiber and be fused to the glass blocks of this high power laser light optical fiber one end; It is characterized in that, an end of described glass blocks and high power laser light fused fiber splice is cone structure, the taper end of cone structure and fused fiber splice, and this taper end end face is circle or polygonized structure.
2. the end face of high power laser light optical fiber as claimed in claim 1 protection structure, is characterized in that, the cone angle of described glass blocks cone structure is greater than the beam divergence angle of optical fiber Output of laser.
3. the end face of high power laser light optical fiber as claimed in claim 1 or 2 protection structure, is characterized in that, the face area of described glass blocks cone structure taper end is equal to or greater than the optical fiber area.
4. the end face of high power laser light optical fiber as claimed in claim 1 or 2 protection structure, is characterized in that, the end that described glass blocks is thicker is cylinder or prism.
5. the end face of high power laser light optical fiber as claimed in claim 3 protection structure, is characterized in that, the end that described glass blocks is thicker is cylinder or prism.
6. the end face of high power laser light optical fiber as claimed in claim 1 or 2 protection structure, is characterized in that, the end face of the end that described glass blocks is thicker is coated with the anti-reflection film that can reduce the end face reflection loss.
7. the end face of high power laser light optical fiber as claimed in claim 3 protection structure, is characterized in that, the end face of the end that described glass blocks is thicker is coated with the anti-reflection film that can reduce the end face reflection loss.
8. the end face of high power laser light optical fiber as claimed in claim 4 protection structure, is characterized in that, the end face of the end that described glass blocks is thicker is coated with the anti-reflection film that can reduce the end face reflection loss.
9. the end face of high power laser light optical fiber as claimed in claim 1 or 2 is protected structure; it is characterized in that; the end that described glass blocks is thicker is used as the output of fiber laser or laser output or the input of high power laser light coupling device, and the face size of this end is greater than the laser spot size at this place.
10. the end face of high power laser light optical fiber as claimed in claim 3 is protected structure; it is characterized in that; the end that described glass blocks is thicker is used as the output of fiber laser or laser output or the input of high power laser light coupling device, and the face size of this end is greater than the laser spot size at this place.
11. the end face of high power laser light optical fiber as claimed in claim 4 protection structure; it is characterized in that; the end that described glass blocks is thicker is used as the output of fiber laser or laser output or the input of high power laser light coupling device, and the face size of this end is greater than the laser spot size at this place.
12. the end face of high power laser light optical fiber as claimed in claim 5 protection structure; it is characterized in that; the end that described glass blocks is thicker is used as the output of fiber laser or laser output or the input of high power laser light coupling device, and the face size of this end is greater than the laser spot size at this place.
13. the end face of high power laser light optical fiber as claimed in claim 6 protection structure; it is characterized in that; the end that described glass blocks is thicker is used as the output of fiber laser or laser output or the input of high power laser light coupling device, and the face size of this end is greater than the laser spot size at this place.
14. the end face of high power laser light optical fiber as claimed in claim 7 protection structure; it is characterized in that; the end that described glass blocks is thicker is used as the output of fiber laser or laser output or the input of high power laser light coupling device, and the face size of this end is greater than the laser spot size at this place.
15. the end face of high power laser light optical fiber as claimed in claim 8 protection structure; it is characterized in that; the end that described glass blocks is thicker is used as the output of fiber laser or laser output or the input of high power laser light coupling device, and the face size of this end is greater than the laser spot size at this place.
16. the end face of high power laser light optical fiber as claimed in claim 1 protection structure is characterized in that described high power laser light optical fiber is fiber laser gain fibre used, or for laser, exports the passive energy-transmission optic fibre of coupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202886728U CN203312620U (en) | 2013-05-23 | 2013-05-23 | End face protection structure of high-power laser optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202886728U CN203312620U (en) | 2013-05-23 | 2013-05-23 | End face protection structure of high-power laser optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203312620U true CN203312620U (en) | 2013-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202886728U Expired - Lifetime CN203312620U (en) | 2013-05-23 | 2013-05-23 | End face protection structure of high-power laser optical fiber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280688A (en) * | 2013-05-23 | 2013-09-04 | 纽敦光电科技（上海）有限公司 | End face protection structure of high-power laser optical fiber |
-
2013
- 2013-05-23 CN CN2013202886728U patent/CN203312620U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280688A (en) * | 2013-05-23 | 2013-09-04 | 纽敦光电科技（上海）有限公司 | End face protection structure of high-power laser optical fiber |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131127 |
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| CX01 | Expiry of patent term |