CN203480079U - End cap structure for reducing the entering of feedback light into optical fiber - Google Patents
End cap structure for reducing the entering of feedback light into optical fiber Download PDFInfo
- Publication number
- CN203480079U CN203480079U CN201320599843.9U CN201320599843U CN203480079U CN 203480079 U CN203480079 U CN 203480079U CN 201320599843 U CN201320599843 U CN 201320599843U CN 203480079 U CN203480079 U CN 203480079U
- Authority
- CN
- China
- Prior art keywords
- end cap
- optical fiber
- feedback light
- conical section
- lines
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Optical Couplings Of Light Guides (AREA)
Abstract
The utility model relates to an end cap structure for reducing the entering of feedback light into optical fiber. The end cap structure comprises an end cap cylinder part and an end cap cone part, and is characterized in that the conical surface of the end cap cone part is provided with stepped lines, and the lines are zigzagged in shape when being observed from the side surface of the end cap. The end cap structure is in actual use, the stepped lines on the end cap break through the smooth interface between the conical surface and air, so that the feedback light transmitted to the interface cannot generate full reflection or the reflection of the feedback light can be seriously deviated via the conical surface, thereby achieving the aim of reducing the coupling of the feedback light into the optical fiber.
Description
Technical field
The utility model relates to a kind of end cap structure that feedback light enters optical fiber that reduces, and this structure can effectively reduce reverse feedback light and enter Transmission Fibers, belongs to high power laser light optical fiber transmission technique field.
Background technology
Laser fiber-optic transmission system is widely used in Laser Processing industrial circle.Laser beam is exported after Optical Fiber Transmission, by collimating mirror and focusing system, acts on surface of the work.Compared to traditional space laser transmission, Optical Fiber Transmission can realize reliable long-distance flexible transmission, has greater flexibility.In laser fiber-optic transmission system, laser is from one section of output of Transmission Fibers.Along with the progress of technology, laser output power improves, and in the certain situation of Transmission Fibers output end face area, the laser power density that end face bears improves.
Under middle high power laser light output power, be only that ordinary optic fibre end face cannot bear so high laser power density.Now, need to connect the preceding paragraph fused quartz rod as end cap at optical-fiber laser output terminal.Laser enters end cap, diverging laser beam in the uniform quartzy end cap of refractive index from optical fiber output.Laser beam enters space from end cap output propagate a segment distance in end cap after, now end cap Laser output end face optical power density, compared to being directly greatly decreased to when fiber end face is exported in the reference optical power that quartz surfaces can bear, has increased the reliability of Laser output.End cap Laser output end face can plate the light anti-reflection film of high laser damage threshold simultaneously, reduces the optical power loss producing at end face reflection due to laser.
In order to facilitate the welding of optical fiber and end cap, the part generally the end cap second half section being connected with optical fiber is made into the cone with certain angle, and the facet of cone one end is connected with optical fiber.
In transmission laser system actual application, the laser of workpiece to be machined surface reflection may enter end cap, forms feedback light.The feedback light of the certain angle transmitting in end cap, by end cap side surface cone segments conical surface surface reflection particularly, may be reversed and be coupled into optical fiber, part is occurred the laser of transmission laser system and leading portion to and produce adverse influence.
Utility model content
If the purpose of this utility model is in order to overcome above-mentioned existing end cap problem weak to feedback light protective capacities in application process, and provide a kind of end cap structure that feedback light enters optical fiber that reduces.End cap structure of the present utility model is made zigzag lines on the surface of end cap conical section, break interface level and smooth between cone surface and air, the feedback light that makes to propagate on this interface cannot produce total reflection, or make feedback light through cone surface reflection substantial deviation, thereby reach, reduce the object that feedback light is coupled into optical fiber.
The purpose of this utility model is achieved through the following technical solutions:
A kind ofly reduce the end cap structure that feedback light enters optical fiber, described end cap structure is comprised of end cap columnar part and end cap conical section, it is characterized in that: stepped lines is made on the conical surface surface at end cap conical section, and lines is observed indentation from end cap side.
Described end cap is that the material by fused quartz is made, and output terminal is end cap columnar part, with optical fiber joint end be end cap conical section; The most advanced and sophisticated facet of end cap conical section and fiber end face welding.
The cross-sectional diameter of described end cap columnar part is greater than laser from the spot diameter of end cap output.
The most advanced and sophisticated facet of described end cap conical section is greater than connected fibre cladding diameter and adds both sides sawtooth depth of lines, and cone angle is greater than the angle of divergence that laser is propagated in end cap, guarantees that all laser exports from end cap Laser output end face.
The conical surface zigzag lines density of described end cap conical section is large as much as possible, makes each sawtooth sharp-pointed as far as possible.Requirement depth of lines can not be excessive, can not affect the forward-propagating of light in end cap.
The utility model contrast prior art has following beneficial effect:
The utility model proposes a kind of end cap structure that feedback light enters optical fiber that reduces, surface at end cap conical section makes zigzag lines, break interface level and smooth between cone surface and air, the feedback light that makes to propagate on this interface cannot produce total reflection, or make feedback light through cone surface reflection substantial deviation, thereby reach, reduce the object that feedback light is coupled into optical fiber.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that existing end cap feedback light is coupled into optical fiber;
Fig. 2 is the utility model end cap structural representation;
Fig. 3 is that the utility model end cap is at the schematic diagram having in feedback light situation.
Label declaration:
1 is end cap columnar part, and 2 is end cap conical section, and 3 is optical fiber, and 4 is sawtooth lines, and 5 is end cap cone facet.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As shown in Figure 2, a kind ofly reduce the end cap structure that feedback light enters optical fiber, described end cap structure is comprised of end cap columnar part 1 and end cap conical section 2, it is characterized in that: stepped lines is made on the conical surface surface at end cap conical section 2, and lines is observed and is sawtooth lines 4 from end cap side.Described end cap is that the material by fused quartz is made, and output terminal is end cap columnar part 1, with optical fiber 3 links be end cap conical section 2; Most advanced and sophisticated facet 5 and the optical fiber 3 end face weldings of end cap conical section 2.The cross-sectional diameter of described end cap columnar part 1 is greater than laser from the spot diameter of end cap output.The most advanced and sophisticated facet of described end cap conical section 2 is greater than connected optical fiber 3 cladding diameters and adds both sides sawtooth depth of lines, and cone angle is greater than the angle of divergence that laser is propagated in end cap, guarantees that all laser exports from end cap Laser output end face.Conical surface zigzag line 4 direction densities of described end cap conical section 2 are large as much as possible, make each sawtooth sharp-pointed as far as possible.Requirement depth of lines can not be excessive, can not affect the forward-propagating of light in end cap.
Wherein end cap columnar part 1 diameter and the setting of end cap entire length are suitable, guarantee that all laser is from the outgoing of end cap output end face.End cap conical section 2 cone angles are greater than the laser beam divergent angle of injecting end cap from optical fiber.
The density of zigzag lines is limited by processing technology, and density is large as much as possible, makes each sawtooth more sharply better.The degree of depth of lines is not excessive, and the lines after processing can not hinder the propagation of forward laser beam in end cap, guarantees that forward laser is from the outgoing of end cap end face.
End cap end face output beam spot diameter D and end cap length L have following relation:
Wherein θ is the angle of divergence (full-shape) of light beam in end cap, and d is that laser is from the spot diameter of fiber end face outgoing.End cap actual diameter is greater than end cap end face output beam spot diameter D, guarantees that all Output of lasers go out to inject space from end cap output end face.Select suitable end cap length L to make D large as far as possible, reduce the power density of outgoing hot spot.
End cap conical section facet diameter S need to be greater than connected fibre cladding diameter Ф and add both sides sawtooth depth of lines h:
S＞Ф+2h
End cap conical section cone angle > θ.
As Fig. 1, common end cap, when meeting with the feedback light of certain angle, due to the reflection of the cone conical surface, may be coupled into the optical fiber of connection.As shown in Figure 3, at the conical surface, add after zigzag lines, the feedback light that originally produces reflection on the cone conical surface cannot produce total reflection because interface angle changes, and has changed the reflection direction of feedback light, or by feedback light refraction place end cap, effectively reduced feedback light and entered optical fiber.
Claims (5)
1. one kind is reduced the end cap structure that feedback light enters optical fiber, described end cap structure is comprised of end cap columnar part and end cap conical section, it is characterized in that: stepped lines is made on the conical surface surface at end cap conical section, and lines is observed indentation from end cap side.
2. minimizing feedback light according to claim 1 enters the end cap structure of optical fiber, it is characterized in that: described end cap is that the material by fused quartz is made, and output terminal is end cap columnar part, with optical fiber joint end be end cap conical section; The most advanced and sophisticated facet of end cap conical section and fiber end face welding.
3. minimizing feedback light according to claim 1 enters the end cap structure of optical fiber, it is characterized in that: the cross-sectional diameter of described end cap columnar part is greater than laser from the spot diameter of end cap output.
4. minimizing feedback light according to claim 1 enters the end cap structure of optical fiber, it is characterized in that: the most advanced and sophisticated facet of end cap conical section is greater than connected fibre cladding diameter and adds both sides sawtooth depth of lines, and cone angle is greater than the angle of divergence that laser is propagated in end cap.
5. minimizing feedback light according to claim 1 enters the end cap structure of optical fiber, it is characterized in that: the conical surface zigzag lines density of end cap conical section is large as much as possible, makes each sawtooth sharp-pointed as far as possible.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320599843.9U CN203480079U (en) | 2013-09-27 | 2013-09-27 | End cap structure for reducing the entering of feedback light into optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320599843.9U CN203480079U (en) | 2013-09-27 | 2013-09-27 | End cap structure for reducing the entering of feedback light into optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203480079U true CN203480079U (en) | 2014-03-12 |
Family
ID=50228387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320599843.9U Expired - Lifetime CN203480079U (en) | 2013-09-27 | 2013-09-27 | End cap structure for reducing the entering of feedback light into optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203480079U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017191194A (en) * | 2016-04-13 | 2017-10-19 | 三菱電線工業株式会社 | Optical fiber/quartz block junction structure and method of manufacturing the same |
| JP2017223780A (en) * | 2016-06-14 | 2017-12-21 | 株式会社フジクラ | Optical device and laser apparatus |
| CN109994918A (en) * | 2018-01-02 | 2019-07-09 | 深圳市创鑫激光股份有限公司 | Laser export head and laser with the laser export head |
| WO2020162058A1 (en) * | 2019-02-05 | 2020-08-13 | 株式会社フジクラ | Production method |
| WO2020196562A1 (en) * | 2019-03-27 | 2020-10-01 | 古河電気工業株式会社 | End part structure of optical fiber and semiconductor laser module |
-
2013
- 2013-09-27 CN CN201320599843.9U patent/CN203480079U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017191194A (en) * | 2016-04-13 | 2017-10-19 | 三菱電線工業株式会社 | Optical fiber/quartz block junction structure and method of manufacturing the same |
| JP2017223780A (en) * | 2016-06-14 | 2017-12-21 | 株式会社フジクラ | Optical device and laser apparatus |
| CN109994918A (en) * | 2018-01-02 | 2019-07-09 | 深圳市创鑫激光股份有限公司 | Laser export head and laser with the laser export head |
| WO2020162058A1 (en) * | 2019-02-05 | 2020-08-13 | 株式会社フジクラ | Production method |
| JP2020126161A (en) * | 2019-02-05 | 2020-08-20 | 株式会社フジクラ | Manufacturing method |
| WO2020196562A1 (en) * | 2019-03-27 | 2020-10-01 | 古河電気工業株式会社 | End part structure of optical fiber and semiconductor laser module |
| JP7479348B2 (en) | 2019-03-27 | 2024-05-08 | 古河電気工業株式会社 | Optical fiber end structure and semiconductor laser module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203480079U (en) | End cap structure for reducing the entering of feedback light into optical fiber | |
| CN201017078Y (en) | High-power laser injection optical fiber coupling device | |
| CN204790085U (en) | Fiber combiner | |
| CN103975263A (en) | Optical fiber combiner and laser device employing same | |
| CN204536604U (en) | Optical coupling device and optical module | |
| CN103412369A (en) | Optical fiber beam combiner and preparation method thereof | |
| CN102650717A (en) | Multi-mode/single-mode optical fiber connector based on double-clad optical fiber | |
| CN108490546B (en) | Optical waveguide mode converter for improving optical waveguide transmission characteristics | |
| CN102967981A (en) | Super-continuous spectrum light source based on multicore photonic crystal fiber | |
| CN203037892U (en) | High power optical fiber collimator | |
| EP2211216B1 (en) | Monolithic optical fiber pump coupler for high-aspect ratio solid-state gain waveguide | |
| CN110501782B (en) | Low-loss and high-strength welding method for large-mode-field photonic crystal fiber | |
| CN101833132A (en) | Method for laser coupling between optical fibers | |
| CN102882128B (en) | Based on the high-power and high-luminance LASER Light Source of optical fiber cone coupling | |
| CN203480074U (en) | Connecting structure of embedded end cap and fiber | |
| CN110768089A (en) | Method for preventing laser from feeding back light | |
| CN104051937A (en) | High-power multi-core optical fiber laser device | |
| CN107925212A (en) | For to the two directional pump optical fiber of cladding-pumped fiber transmission energy | |
| CN205263347U (en) | Optic fibre that match optic fibre mould field | |
| CN204790068U (en) | High -power optical collimator | |
| CN203025420U (en) | Optical fiber beam combiner | |
| CN204765913U (en) | Wave system that closes of multichannel laser is united | |
| CN103825190A (en) | Method and device for outputting high-energy fundamental mode laser in large-core-diameter optical fibre based on stimulated Brillouin scattering technology | |
| CN203480073U (en) | Fiber combiner | |
| CN203164480U (en) | Long distance loose coupling fiber coupler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 430074 East Lake science and technology zone, Wuhan province high tech Avenue, No. 999, the future of science and technology city of the city of Hubei Patentee after: WUHAN RAYCUS FIBER LASER TECHNOLOGIES Co.,Ltd. Address before: 430223 East Lake New Technology Development Zone, Huazhong University of Science and Technology, Wuhan science and technology park innovation base, building No. 10, building No. Patentee before: WUHAN RAYCUS FIBER LASER TECHNOLOGIES Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20140312 |
|
| CX01 | Expiry of patent term |