CN103454730A - Optical fiber collimator - Google Patents
Optical fiber collimator Download PDFInfo
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- CN103454730A CN103454730A CN2013104421912A CN201310442191A CN103454730A CN 103454730 A CN103454730 A CN 103454730A CN 2013104421912 A CN2013104421912 A CN 2013104421912A CN 201310442191 A CN201310442191 A CN 201310442191A CN 103454730 A CN103454730 A CN 103454730A
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- optical fiber
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Abstract
The invention provides an optical fiber collimator which comprises an optical fiber and a quartz lens, wherein the optical fiber is in butt joint with the quartz lens. A coating layer is arranged on the surface of the optical fiber, and the optical fiber is further provided with a butt-joint end without the coating layer. The quartz lens is provided with an input end and an output end, the input end of the quartz lens and the butt-joint end of the optical fiber are smoothly welded into a whole, the output end of the quartz lens serves as a focusing lens, and adjustment of parameters of the optical fiber collimator is achieved through adjustment of the curvature radius of the focusing lens. The optical fiber collimator is simple in manufacturing method, compact in structure and applicable to high-power laser output.
Description
Technical field
The present invention relates to a kind of optical fiber collimator, relate in particular to a kind of optical fiber collimator that is applied to high-capacity optical fiber laser.
Background technology
Optical fiber collimator is an important assembly in optical passive component, very general application is arranged in optical communication system, also the basis that makes other multiple Miniature optical passive devices, as polarizer, isolator, optical splitter, wave filter, photoswitch and wavelength division multiplexer etc. simultaneously.The optical fiber collimator structure adopted at present is that optical fiber is placed on the focal plane of lens (common lens have GRIN lens and C-lens), mode by Space Coupling, realization is transformed to parallel beam by the divergent beams of fiber end face outgoing, or parallel beam can be focused on and is coupled in optical fiber.
Optical fiber collimator structure commonly used as shown in Figure 1, in figure, 101 is optical fiber, 102 is the optical fiber head that optical fiber 101 and optical fiber kapillary form, 103 is optical collimation lens, 104 sleeve pipes that are fixed fiber head 102 and collimation lens 103, and 105 is the air-gap between optical fiber head and collimation lens, 106 epoxide-resin glues that are fixed fiber, by adjusting the position of optical fiber head, make it be placed in the focus place of optical collimation lens 103, can make optical fiber collimator.
, there is clearance in structure owing to adopting Space Coupling between optical fiber and lens, therefore higher to the requirement of manufacture craft.Easily produce fiber end face and lens focal plane misalignment in manufacturing process, and the phenomenon of fiber axis and lens axis mismatch, thereby affect output couple efficiency and the beam quality of collimating apparatus.In addition, when Laser output, particularly high power laser output, the fiber-optic output face often produces damage and deformation because a power density is too high, limited the collimating apparatus of this structure at laser instrument, particularly the application in high power laser.
Therefore, develop and a kind ofly make that simple, compact conformation, coupling efficiency are high, can to bear the optical fiber collimator of high power laser transmission most important for the development of the lifting of optical communication system performance, high power fiber laser.
Summary of the invention
Technical matters to be solved by this invention is: provide a kind of making simple, not only can be applied to lower powered Laser output, also can be applied to high power laser output, the novel optical fiber collimator that coupling efficiency is high.
Optical fiber collimator proposed by the invention, comprise optical fiber and lens.
Wherein, the surface of optical fiber is provided with coat, and the one end is the butt end without coat; Lens can adopt quartz lens, this quartz lens is cylinder, and body diameter is greater than fibre diameter, lens one end is input end, the other end is output terminal, the butt end welding of described input end and optical fiber is an integral body, and the fibre core of optical fiber and lens center be on same axis, and described output terminal is condenser lens.
Also plated film not of one deck antiradar reflectivity film can be plated in the surface of described quartz lens.The end face of its output terminal needs rubbing down smooth, and this end face can be taper surface, can be also plane.The condenser lens of described output terminal can be spherical lens, can be also non-spherical lens.The diameter of described quartz lens, spherical lens or aspheric radius-of-curvature and length can be set according to the actual requirements.
Described quartz lens.The end face of its input end needs rubbing down smooth, and this end face can be taper surface, can be also plane.The condenser lens of described output terminal can be spherical lens, can be also non-spherical lens, and also plated film not of one deck anti-reflection film can be plated in surface.The diameter of described quartz lens, spherical lens or aspheric radius-of-curvature and length can be set according to the actual requirements.
The welding of described optical fiber and quartz lens can adopt the high-temperature soldering mode, as laser bonding, also can adopt the welding of arc discharge mode.
Compared with prior art, the present invention greatly reduces the difficulty of manufacture craft, make the manufacture craft of optical fiber collimator simple, and compact conformation, mode by quartz lens and the direct welding of optical fiber, there do not is clearance between fiber-optic output face and lens, when the transmission high power laser, the light beam of fiber end face output can directly expand through quartz lens, reduced the some power density of light beam, fiber end face and lensed endface are not easy to produce deformation and damage, protected the end face of optical fiber and lens, therefore make optical fiber collimator not only go for lower powered fiber laser output, can also be applicable to high power fiber laser output, have wide range of applications.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention will be described in detail, wherein:
The structural representation that Fig. 1 is the existing fiber collimating apparatus;
The structural representation that Fig. 2 is optical fiber collimator of the present invention;
The A-A cut-open view that Fig. 3 is Fig. 2.
Embodiment
As shown in Figure 2 and Figure 3, the optical fiber collimator that one embodiment of the invention proposes, comprise the output optical fibre 301 that is positioned at left side and the lens 201 that are positioned at right side.
In the present embodiment, output optical fibre 301 has adopted doubly clad optical fiber, comprises successively from inside to outside fibre core 304, covering 303, coat 302.Lens 201 adopt columniform quartz lens, and the one end is input end, and the other end is output terminal, and the diameter of quartz lens is greater than the diameter of optical fiber, and the spot diameter that the concrete diameter of quartz lens can be exported is as required selected.The end face of input end can be taper surface, it can also be plane, output terminal 202 can be spherical lens or non-spherical lens, one deck antiradar reflectivity film can be plated in the surface of quartz lens, the reflectivity of antiradar reflectivity film is less than 0.3%, plating antiradar reflectivity film can improve the transfer efficiency of light, makes the light transmissioning efficiency of collimating apparatus higher, thus the better effects if reached.
During docking, because coat adopts polymeric material, make, hold high temperature that can't stand welding, so an end of output optical fibre need to peel off coat 302, form the butt end 305 without coat, and the end face of butt end 305 to cut smoothly, be convenient to welding.Corresponding, the input end of quartz lens 201 also rubbing down is smooth, then directly be fused into an integral body with the butt end of optical fiber, and in the integral body after welding, fiber core 304 and quartz lens 201 centers are aimed at, the Gaussian beam of optical fiber output could be passed through the conversion of quartz lens like this, and the light beam that quartz lens is exported collimates.The input end of quartz lens can be the smooth flat formed by the lens cross section, but for different collimating apparatuss, the diameter of quartz lens may be very large, make fibre core be difficult to aim at the center of quartz lens, manufacture difficulty is very high, and therefore, the input end of quartz lens can also be made a taper, reduce the diameter on welding plane, greatly reduce the difficulty of making.
In above-mentioned docking operation, by output optical fibre and lens center, welding is as a whole alignedly, this is an emphasis of the present invention, optical fiber and air do not have direct interphase like this, can not damage too greatly the end face of optical fiber and lens because of luminous power, therefore, can be applied in high power laser output, and, output couple efficiency and the beam quality of collimating apparatus have also been improved, effectively solved in prior art when optical fiber docks with lens, be not easy to aim at, and the shortcoming of optical fiber week and axis of lens mismatch.
In the present embodiment, the core diameter of this doubly clad optical fiber is 25 um, and cladding diameter is 250 um, and the diameter of quartz lens is 4 mm, and its overall length is 15mm.By adjusting the radius-of-curvature of quartz lens output terminal 202, the spot diameter with a tight waist that can obtain this optical fiber collimator is 0.7 mm, and operating distance is 150 mm, and the angle of divergence is 2.0 mrad.
The foregoing is only embodiments of the invention, be not limited to the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. an optical fiber collimator is characterized in that comprising: an optical fiber, and its surface is provided with coat, and the one end is the butt end without coat;
One cylindrical lens, its diameter is greater than described optical fiber, and the butt end welding of the input end of described lens and optical fiber is an integral body, and the fibre core of optical fiber and lens center be on same axis, and the output terminal of described lens is condenser lens.
2. optical fiber collimator as claimed in claim 1, it is characterized in that: the end face that described lens are input end is taper surface or plane.
3. optical fiber collimator as claimed in claim 1, it is characterized in that: the output terminal of described lens is spherical lens or non-spherical lens.
4. optical fiber collimator as claimed in claim 1, it is characterized in that: described lens surface is coated with reflectance coating, and the reflection ratio of reflectance coating is less than 0.3%.
5. optical fiber collimator as claimed in claim 1, it is characterized in that: described optical fiber is doubly clad optical fiber, and its core diameter is 25um, and cladding diameter is 250um; Described lens are quartz lens, and its diameter is 3mm, and length is 15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104421912A CN103454730A (en) | 2013-09-26 | 2013-09-26 | Optical fiber collimator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104421912A CN103454730A (en) | 2013-09-26 | 2013-09-26 | Optical fiber collimator |
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| CN103454730A true CN103454730A (en) | 2013-12-18 |
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| CN2013104421912A Pending CN103454730A (en) | 2013-09-26 | 2013-09-26 | Optical fiber collimator |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941348A (en) * | 2014-03-27 | 2014-07-23 | 鞍山创鑫激光技术有限公司 | Multi-input and high-power multi-mode optical fiber collimator |
| CN104865646A (en) * | 2015-06-10 | 2015-08-26 | 武汉锐科光纤激光器技术有限责任公司 | High-power optical collimator |
| CN105511098A (en) * | 2016-01-25 | 2016-04-20 | 中国工程物理研究院应用电子学研究所 | Fiber laser integrated collimation optical device |
| CN108572420A (en) * | 2018-07-20 | 2018-09-25 | 中国人民解放军国防科技大学 | Bidirectional optical fiber end cap with laser beam expanding output and reflection functions and application thereof |
| CN110045463A (en) * | 2018-01-15 | 2019-07-23 | 中国科学院上海光学精密机械研究所 | A kind of connector and method of fused fiber splice |
| CN110967795A (en) * | 2019-12-11 | 2020-04-07 | 瑞尔通(苏州)医疗科技有限公司 | Coupling structure applying end cap lens |
| CN111045152A (en) * | 2018-10-11 | 2020-04-21 | 朗美通经营有限责任公司 | Optical fiber coupler |
| CN113238323A (en) * | 2021-05-19 | 2021-08-10 | 福州高意通讯有限公司 | Method for marking high and low ends of optical fiber head and lens based on laser principle |
| CN113805259A (en) * | 2021-09-24 | 2021-12-17 | 南京格奥光电科技有限公司 | C-shaped aspheric lens and optical fiber coupler with same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1438503A (en) * | 2001-12-05 | 2003-08-27 | Jds尤尼费斯公司 | High-power optical-fiber coupling |
| CN1781041A (en) * | 2002-12-31 | 2006-05-31 | 康宁股份有限公司 | Small mode-field fiber lens and manufacture thereof |
| CN102520490A (en) * | 2012-01-16 | 2012-06-27 | 天津工业大学 | Large-mode-area single-mode fiber connector and manufacture method |
| CN103246020A (en) * | 2013-05-23 | 2013-08-14 | 深圳市天阳谷科技发展有限公司 | Optical fiber collimator and production method thereof |
| CN203561768U (en) * | 2013-09-26 | 2014-04-23 | 深圳朗光科技有限公司 | Optical collimator |
-
2013
- 2013-09-26 CN CN2013104421912A patent/CN103454730A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1438503A (en) * | 2001-12-05 | 2003-08-27 | Jds尤尼费斯公司 | High-power optical-fiber coupling |
| CN1781041A (en) * | 2002-12-31 | 2006-05-31 | 康宁股份有限公司 | Small mode-field fiber lens and manufacture thereof |
| CN102520490A (en) * | 2012-01-16 | 2012-06-27 | 天津工业大学 | Large-mode-area single-mode fiber connector and manufacture method |
| CN103246020A (en) * | 2013-05-23 | 2013-08-14 | 深圳市天阳谷科技发展有限公司 | Optical fiber collimator and production method thereof |
| CN203561768U (en) * | 2013-09-26 | 2014-04-23 | 深圳朗光科技有限公司 | Optical collimator |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941348A (en) * | 2014-03-27 | 2014-07-23 | 鞍山创鑫激光技术有限公司 | Multi-input and high-power multi-mode optical fiber collimator |
| CN104865646A (en) * | 2015-06-10 | 2015-08-26 | 武汉锐科光纤激光器技术有限责任公司 | High-power optical collimator |
| CN105511098A (en) * | 2016-01-25 | 2016-04-20 | 中国工程物理研究院应用电子学研究所 | Fiber laser integrated collimation optical device |
| CN110045463A (en) * | 2018-01-15 | 2019-07-23 | 中国科学院上海光学精密机械研究所 | A kind of connector and method of fused fiber splice |
| CN108572420A (en) * | 2018-07-20 | 2018-09-25 | 中国人民解放军国防科技大学 | Bidirectional optical fiber end cap with laser beam expanding output and reflection functions and application thereof |
| CN108572420B (en) * | 2018-07-20 | 2024-02-02 | 中国人民解放军国防科技大学 | Bidirectional optical fiber end cap with laser beam expansion output and reflection functions and application thereof |
| CN111045152A (en) * | 2018-10-11 | 2020-04-21 | 朗美通经营有限责任公司 | Optical fiber coupler |
| CN110967795A (en) * | 2019-12-11 | 2020-04-07 | 瑞尔通(苏州)医疗科技有限公司 | Coupling structure applying end cap lens |
| CN113238323A (en) * | 2021-05-19 | 2021-08-10 | 福州高意通讯有限公司 | Method for marking high and low ends of optical fiber head and lens based on laser principle |
| CN113805259A (en) * | 2021-09-24 | 2021-12-17 | 南京格奥光电科技有限公司 | C-shaped aspheric lens and optical fiber coupler with same |
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Application publication date: 20131218 |