CN203037892U - High power optical fiber collimator - Google Patents
High power optical fiber collimator Download PDFInfo
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- CN203037892U CN203037892U CN 201220722475 CN201220722475U CN203037892U CN 203037892 U CN203037892 U CN 203037892U CN 201220722475 CN201220722475 CN 201220722475 CN 201220722475 U CN201220722475 U CN 201220722475U CN 203037892 U CN203037892 U CN 203037892U
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- optical fiber
- collimator
- fiber collimator
- high power
- conical transition
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Abstract
The utility model relates to an optical fiber collimator. According to the technical problem to be solved, the high power optical fiber collimator which reduces the reflection loss of an end face is provided in view of the defects of the prior art. The high power optical fiber collimator is characterized in that the optical fiber collimator is formed by integrally welding an optical fiber and a multimode optical fiber preform; the back end of the multimode optical fiber preform which plays a self-focusing lens effect is provided with a conical transition region; the diameter of the last end of the conical transition region is equal to the diameter of the optical fiber; and the front end of the optical fiber and the last end of the conical transition region are welded. According to the utility model, the silica-based multimode optical fiber perform and the optical fiber are well welded together; the multimode optical fiber preform has the characteristic of a gradient refractive index and can realize the function of a self-focusing lens; due to the fact that the self-focusing lens and the optical fiber are welded together, an air gap between the self-focusing lens and the optical fiber can be eliminated, and the damage of a high power light to the end face is reduced; and the high light damage resistance of the high power optical fiber collimator is enhanced.
Description
Technical field
The utility model relates to optical fiber collimator.
Technical background
Optical fiber collimator is the basic optical device in optical fiber communication and the optical fiber sensing system.It is made up of tail optical fiber and collimation lens (GRIN Lens or C-Lens), has to insert that loss is low, return loss is high, operating distance is long, operating wavelength range is wide, beam divergence angle is little and stable and reliability is high, volume is little, characteristics such as in light weight.Optical fiber collimator is that the divergent beams with outgoing in the optical fiber are transformed to parallel beam, perhaps parallel beam assembled and high-level efficiency is coupled into optical fiber to improve the coupling efficiency of fibre system, and be the basic device of making multiple optical device.It can be advantageously used in multiple optical passive component, as attenuator, optical splitter, isolator, wave filter, photoswitch and wavelength division multiplexer etc.
Optical fiber collimator can be divided into single mode fiber collimator and multimode optical fiber collimating apparatus according to the difference of optical fiber.Wherein, the multimode optical fiber collimating apparatus is widely used in biography energy aspect owing to its coupling efficiency is high.According to the type difference of used lens, existing optical fiber collimator can be divided into three major types, is respectively self-focusing lens type collimating apparatus, C-lens lens-type collimating apparatus and globe lens type collimating apparatus.
Optical fiber collimator structure of the prior art is the two-piece-dress formula, lens or lens combination by optical fiber contact pins and a collimating effect are constituted, debug optical power value maximum to outgoing beam by the relative position of regulating optical fiber head and collimation lens, at last optical fiber contact pins and glass bushing gluing are fixedly finished the preparation of whole optical fiber collimator.Have the gap between the fiber end face of the optical fiber collimator of this structure and the lensed endface, thereby the reflection loss that causes producing on two end faces of collimating apparatus is easy to damage end face, has reduced the photo-damage resistance of fiber optic passive device.
The utility model content
Technical problem to be solved in the utility model is at the deficiencies in the prior art, and a kind of high-power optical fiber collimator is provided, and can reduce the reflection loss of end face, improves the photo-damage resistance of optical fiber collimator.
For solving the problems of the technologies described above, technical solution of the present utility model is:
A kind of high-power optical fiber collimator is characterized in that: described optical fiber collimator is integrally formed by optical fiber 1 and multimode optical fiber preform 4 weldings; Describedly have a conical transition zone 3 for multimode optical fiber preform 4 rear ends of playing the GRIN Lens effect, the diameter of the rearmost end of described conical transition zone 3 is suitable with the diameter of optical fiber; Optical fiber 1 front end and described conical transition zone 3 rearmost end phase weldings.
The diameter d of described multimode optical fiber preform 4
2Be optical fiber 1 diameter d
13 ~ 5 times; The described entire length L that has the multimode optical fiber preform 4 of conical transition zone 3
2Be 7.7mm ± 0.4mm; The length of described conical transition zone 3 is 2.9mm ± 0.2mm.
The utility model can bring following beneficial effect:
The utility model adopts multimode optical fiber preform and the optical fiber of silica based well to be welded together, and multimode optical fiber preform has the characteristic of graded index, thereby can expand, collimate light beam, realizes the function of GRIN Lens; Because GRIN Lens and fused fiber splice are together, can eliminate clearance between the two, reduced the damage of high power light to end face, thereby strengthened the high photo-damage resistance of high-power optical fiber collimator.
Description of drawings
Fig. 1: the structural representation of an embodiment of the utility model
Fig. 2: adopt the separator system theory diagram of making embodiment illustrated in fig. 1
Fig. 3: adopt the filter system theory diagram of making embodiment illustrated in fig. 1
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.
Design concept of the present utility model is as follows: the high-power fiber passive device, as wave filter, isolator etc., its inside is made of a plurality of optical elements, so a plurality of component interface are arranged, therefore has very big reflection loss.So many interface not only can produce big loss, and, be difficult to crystal and optical fiber are melted easy optical thin film generation damage to the crystal element surface though produce a large amount of heat after in general high-intensity light passes through.Because the discrete component distance is very near, is easy to cause the film damage of other optical elements after the film damage of an optical element, thereby destroys whole passive device.In fibre optic isolater and wave filter, generally all adopt GRIN Lens that light path is expanded, collimates, and the reflection loss of the generation on two end faces of collimating apparatus can reduce the high photo-damage resistance of entire device greatly.Therefore, the high photo-damage resistance of passive device be strengthened, the quantity of discrete component will be on the basis that guarantees optical property, reduced as far as possible.
The structure of the high-power optical fiber collimator of an embodiment of the present utility model as shown in Figure 1.1 is optical fiber among Fig. 1, and 2 is the welding area, and 3 is conical transition zone, and 4 has been the multimode optical fiber preform of GRIN Lens effect.Play the diameter d of the multimode optical fiber preform 4 of GRIN Lens effect in the present embodiment
2Diameter d for optical fiber 1
14 times; L
1=4.8mm; L
2=7.7mm.
This structure optical fiber 1 that device is used is welded together with multimode optical fiber preform 4.The rear end of multimode optical fiber preform 4 has conical transition zone 3, and the diameter of the diameter of the rearmost end of conical transition zone 3 and optical fiber 1 is suitable.Adopt the benefit of this structure to have: multimode optical fiber preform 4 has the characteristic of graded index on the one hand, thereby can expand, collimate light beam, realizes the function of GRIN Lens; On the other hand, because GRIN Lens and optical fiber 1 are welded together, can eliminate clearance between the two, reduce the damage of high power light to end face, thereby strengthened the high photo-damage resistance of high-power optical fiber collimator.The multimode optical fiber preform 4 of employing graded index is that prefabricated rods 4 is silica based as the main cause of GRIN Lens, its fusing point and optical fiber basically identical.And general GRIN Lens contains multiple composition, and its fusing point is lower, is difficult to carry out welding with optical fiber 1.
The fibre optic isolater that the employing high-power optical fiber collimator makes up and the system principle diagram of wave filter are respectively shown in Fig. 2,3.
In separator system theory diagram shown in Figure 2, be transmitted as example with the light beam forward principle of work of high-power optical fiber collimator in isolator is described.Beam collimation enters birefringece crystal P then behind the high-power optical fiber collimator 1 that light beam is made of through multimode optical fiber preform the optical fiber input
1, light beam is divided into o light and e light, its polarization direction is vertical mutually, the direction of propagation is an angle, when they during through 45 ° of Faraday rotators, the o light of outgoing and e polarization surface are respectively rotated 45 °, because second birefringece crystal P
2Crystallographic axis just in time be 45 ° of angles with respect to first crystal, so o light and e light are by P
2Be refracted to together, synthetic two interfasciculars enter high-power optical fiber collimator 2 then and are coupled in the fiber cores apart from very little directional light.
In filter system theory diagram shown in Figure 3, beam collimation enters filter plate then (filter plate is passband to certain wavelength coverage behind the high-power optical fiber collimator 1 that light beam is made of through multimode optical fiber preform optical fiber input, wavelength beyond this bandwidth range is stopband, thereby form required filtering characteristic), enter high-power optical fiber collimator 2 then and be coupled in the fiber cores.
Claims (2)
1. high-power optical fiber collimator is characterized in that: described optical fiber collimator is integrally formed by optical fiber (1) and multimode optical fiber preform (4) welding; Describedly have a conical transition zone (3) for the multimode optical fiber preform that plays the GRIN Lens effect (4) rear end, the diameter of the rearmost end of described conical transition zone (3) is suitable with the diameter of optical fiber; Optical fiber (1) front end and the welding of described conical transition zone (3) rearmost end phase.
2. according to the described a kind of high-power optical fiber collimator of claim 1, it is characterized in that: the diameter d of described multimode optical fiber preform (4)
2Be optical fiber (1) diameter d
13 ~ 5 times; The described entire length L that has the multimode optical fiber preform (4) of conical transition zone (3)
2Be 7.7mm ± 0.4mm; The length of described conical transition zone (3) is 2.9mm ± 0.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220722475 CN203037892U (en) | 2012-12-25 | 2012-12-25 | High power optical fiber collimator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220722475 CN203037892U (en) | 2012-12-25 | 2012-12-25 | High power optical fiber collimator |
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| Publication Number | Publication Date |
|---|---|
| CN203037892U true CN203037892U (en) | 2013-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220722475 Expired - Fee Related CN203037892U (en) | 2012-12-25 | 2012-12-25 | High power optical fiber collimator |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676051A (en) * | 2013-11-29 | 2014-03-26 | 深圳市创鑫激光技术有限公司 | Myriawatt-level high-power optical fiber end cap |
| 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 |
| WO2017096697A1 (en) * | 2015-12-08 | 2017-06-15 | 北京凯普林光电科技股份有限公司 | Input end structure of optical fiber |
| CN108390245A (en) * | 2018-04-28 | 2018-08-10 | 无锡市德科立光电子技术有限公司 | Microminiature fiber amplifier |
| CN112346178A (en) * | 2020-11-12 | 2021-02-09 | 中国人民解放军国防科技大学 | Integrated collimating optical fiber end cap capable of cutting off light beam and collimating optical fiber end cap array |
| CN113219674A (en) * | 2020-01-21 | 2021-08-06 | 朗美通经营有限责任公司 | Graded-index fiber and phase element for beam shaping and transformation in fiber |
| CN114911009A (en) * | 2022-04-28 | 2022-08-16 | 上海拜安传感技术有限公司 | Optical fiber filter |
-
2012
- 2012-12-25 CN CN 201220722475 patent/CN203037892U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676051A (en) * | 2013-11-29 | 2014-03-26 | 深圳市创鑫激光技术有限公司 | Myriawatt-level high-power optical fiber end cap |
| CN103676051B (en) * | 2013-11-29 | 2015-09-30 | 深圳市创鑫激光股份有限公司 | Myriawatt-level high-power optical fiber end cap |
| WO2017096697A1 (en) * | 2015-12-08 | 2017-06-15 | 北京凯普林光电科技股份有限公司 | Input end structure of optical fiber |
| 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 |
| CN108390245A (en) * | 2018-04-28 | 2018-08-10 | 无锡市德科立光电子技术有限公司 | Microminiature fiber amplifier |
| CN113219674A (en) * | 2020-01-21 | 2021-08-06 | 朗美通经营有限责任公司 | Graded-index fiber and phase element for beam shaping and transformation in fiber |
| CN112346178A (en) * | 2020-11-12 | 2021-02-09 | 中国人民解放军国防科技大学 | Integrated collimating optical fiber end cap capable of cutting off light beam and collimating optical fiber end cap array |
| CN112346178B (en) * | 2020-11-12 | 2022-09-02 | 中国人民解放军国防科技大学 | Integrated collimating optical fiber end cap capable of cutting off light beam and collimating optical fiber end cap array |
| CN114911009A (en) * | 2022-04-28 | 2022-08-16 | 上海拜安传感技术有限公司 | Optical fiber filter |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160119 Address after: 200437 Shanghai city Yangpu District Yixian Road No. 135 Building 1 Room 408 Patentee after: CETC Day Star Laser Technology (Shanghai) Co., Ltd. Address before: 200437 Shanghai City, Yangpu District Shanghai Yixian Road, No. 135 Patentee before: No.23 Inst., Chinese Electronic Science-Technology Group |
|
| 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: 20130703 Termination date: 20201225 |