CN203337857U - A precise fiber delay line based on a pyramid prism - Google Patents
A precise fiber delay line based on a pyramid prism Download PDFInfo
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- CN203337857U CN203337857U CN2013203467806U CN201320346780U CN203337857U CN 203337857 U CN203337857 U CN 203337857U CN 2013203467806 U CN2013203467806 U CN 2013203467806U CN 201320346780 U CN201320346780 U CN 201320346780U CN 203337857 U CN203337857 U CN 203337857U
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- prism
- corner cube
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- delay line
- line based
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Abstract
The utility model discloses a precise fiber delay line based on a pyramid prism. The precise fiber delay line comprises fiber collimators, a pyramid prism, a ball screw, and a packaging casing. The two fiber collimators are installed on one end of the packaging casing. The pyramid prism and the ball screw are disposed in the packaging casing. The chord surface of the pyramid prism is opposite to the light emitting ports of the fiber collimators and is plated with an antireflection film. Three conical surfaces of the pyramid prism are plated with reflection-enhancing films. The pyramid prism is fixed in a lens rack. The lens rack is connected with the ball screw through a connection block. The precise fiber delay line has characteristics of reasonable design, easy use, high delay precision, low insertion loss, and simple structure, and is beneficial to achievement of instrumentation and engineering.
Description
Technical field
The utility model relates to split-second precision delay technology field, particularly relates to a kind of accurate fibre delay line based on prism of corner cube.
Background technology
Optical-fibre precise postpones to be mainly used in the fields such as phased-array radar, Optical Sampling.Especially in Optical Sampling, sampling precision directly is decided by postpone precision.The shortcomings such as optical delay, mainly by stretching optical fiber, adopts the methods such as prism is reflected at present, and wherein the stretching optical fiber method exists loss large, uncontrollable, irrecoverable; Adopt the free space related method thereof to there is extremely strong operability, the general prism that adopts is reflected, like this prism is debug to accuracy requirement very high, and Insertion Loss is larger in moving forward and backward process, consider the problems such as physical construction kinematic accuracy, this kind of method postponing there is larger problem aspect precision and insertion loss always simultaneously.
Therefore, how to design a kind of precision lag line high and that insertion loss is little and become the direction that these those skilled in the art make great efforts.
The utility model content
The purpose of this utility model just is to provide a kind of accurate fibre delay line based on prism of corner cube, solved the problem that prior art is difficult to realize high precision and low insertion loss simultaneously.
The purpose of this utility model realizes by following technical proposals:
A kind of accurate fibre delay line based on prism of corner cube, comprise optical fiber collimator, prism of corner cube, ball-screw and package casing, two optical fiber collimators are arranged on an end of package casing, prism of corner cube and ball-screw are placed in package casing, the string face of prism of corner cube is relative with the optical emission exit of optical fiber collimator, and the string face of described prism of corner cube is coated with anti-reflection film, and three conical surfaces are coated with and increase anti-film, prism of corner cube is fixed in lens mount, and lens mount is connected with ball-screw by contiguous block.
The characteristics of above-mentioned prism of corner cube are: no matter incident beam is with which kind of angle incident, reflected light is all parallel with incident light, and and incident light with respect to the prism of corner cube Central Symmetry.Therefore, can guarantee the absolute parallel of incident light and emergent light.
Further, described optical fiber collimator comprises single-mode fiber, stainless-steel tube, GRIN Lens and globe lens, and GRIN Lens and globe lens are installed in stainless-steel tube successively, and stainless-steel tube connects single-mode fiber near an end of GRIN Lens.
This GRIN Lens and globe lens are optical fibre microlens, volume is small and exquisite, light wave is transmitted by single-mode fiber, after GRIN Lens, waist radius obviously reduces, but the angle of divergence of light beam has certain increase on the original basis, so globe lens is set after GRIN Lens, its effect is exactly the angle of divergence that reduces input beam.By adopting the combination of above-mentioned GRIN Lens and globe lens, change waist radius and the angle of divergence of incident beam, make the parallel ejaculation of light beam.
Further, described ball-screw comprises adjusting knob, shaft coupling, ball screw, feed screw nut one, feed screw nut two and motion circle, adjusting knob is connected with ball screw by shaft coupling, feed screw nut one is threaded with ball screw, feed screw nut two and motion snare are connected on ball screw, and feed screw nut two circle that will move connects as one with feed screw nut one.
Further, lens mount is connected with the motion circle by contiguous block.
Further, on lens mount, symmetry is offered spring eye, mounting spring in spring eye, and spring, in compressive state, arranges steel ball between spring and package casing inwall.
This precision fibre delay line regulates by ball-screw the distance that light is propagated in free space, realizes precision time delay control; Realize low insertion loss by optical fiber collimator.
Compared with prior art, the beneficial effects of the utility model are: reasonable in design, easy to use, postpone precision high, and insertion loss is little, simple in structure, is conducive to realize instrumentation and through engineering approaches.
The accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present utility model;
Fig. 2 is confined state schematic diagram of the present utility model;
Fig. 3 is the structural representation of optical fiber collimator in the utility model;
Fig. 4 is the structural representation of prism of corner cube in the utility model;
Fig. 5 is the structural representation of ball-screw in the utility model;
Fig. 6 is A-A cut-open view in Fig. 5;
Fig. 7 is the partial enlarged drawing at B place in Fig. 6;
Fig. 8 is the three-dimensional structure diagram of ball-screw in the utility model.
Embodiment
Below in conjunction with specific embodiments and the drawings, the utility model is further described.
As shown in Figures 1 to 8, a kind of accurate fibre delay line based on prism of corner cube, comprise optical fiber collimator 1, prism of corner cube 2, ball-screw 3 and package casing 4, two optical fiber collimators 1 are installed in parallel in an end of package casing 4, prism of corner cube 2 and ball-screw 3 are placed in package casing 4, the string face of prism of corner cube 2 is relative with the optical emission exit of optical fiber collimator 1, the string face 21 of described prism of corner cube 2 is coated with the anti-reflection film to optical wavelength 1550nm, three conical surfaces 22 are coated with the anti-film of increasing of optical wavelength 1550nm, whole reflectivity reaches more than 95%, prism of corner cube 2 is fixed in lens mount 5, lens mount 5 is connected with ball-screw 3 by contiguous block 6.
As shown in Figure 3, described optical fiber collimator 1 comprises single-mode fiber 11, stainless-steel tube 12, GRIN Lens 13 and globe lens 14, GRIN Lens 13 and globe lens 14 are installed in stainless-steel tube 12 successively, and stainless-steel tube 12 connects single-mode fiber 11 near an end of GRIN Lens 13.This optical fiber collimator 1 launch spot diameter 4.2mm, insertion loss is less than 0.2dB, and the emergent light angle of divergence is less than 0.0166 °, and in 0～1m scope, these two optical fiber collimator 1 coupling losses are lower than 0.8dB.
As shown in Fig. 5 to Fig. 8, described ball-screw 3 comprises adjusting knob 31, shaft coupling 32, ball screw 33, feed screw nut 1, feed screw nut 2 35 and motion circle 36, adjusting knob 31 is connected with ball screw 33 by shaft coupling 32, feed screw nut 1 is threaded with ball screw 33, feed screw nut 2 35 and motion circle 36 are socketed on ball screw 33, and feed screw nut 2 35 circle 36 that will move connects as one with feed screw nut 1, and lens mount 5 encloses 36 by contiguous block 6 and motion and is connected.
On lens mount 5, symmetry is offered spring eye (not shown in FIG.), mounting spring in spring eye (not shown in FIG.), and spring, in compressive state, arranges steel ball (not shown in FIG.) between spring and package casing 4 inwalls.
Above-mentioned ball-screw 3 can the Precision trimming delay distance.And symmetria bilateralis contacts with encapsulating housing 4 inwalls with steel ball by Compress Spring, thereby realize steadily postponing to regulate.
When this lag line assembling, need to be proofreaied and correct to guarantee that two optical fiber collimator 1 emergent lights are parallel, concrete steps are as follows:
1. will be fixed on lens mount 5 by optical cement for the prism of corner cube 2 of reflection, lens mount 5 is connected with ball-screw 3 by contiguous block 6, and then integral body is packed in package casing 4;
2. the front end of two optical fiber collimators 1 stretches in package casing 4, and relative with the string face of prism of corner cube 2, the rear end of two optical fiber collimators 1 is fixed on sextuple adjusting bracket by fixture, 11 1 of the single-mode fibers of two optical fiber collimators 1 connect light source, a connection light power meter, regulate sextuple adjusting bracket, while monitoring optical power meter reading, when Output optical power is 90% when above, fine setting optical fiber collimator 1 position is until light power meter reading maximum, now, two optical fiber collimator 1 emergent lights are parallel;
3. adopt optical cement that two optical fiber collimators 1 are fixed on to package casing 4 ends, until optical cement takes off sextuple adjusting bracket again after solidifying fully, can effectively avoid like this optical fiber collimator 1 change in location that in the optical cement process of setting, stress causes.
In use, light wave penetrates and beats on prism of corner cube 2 from an optical fiber collimator 1, and then after Rotate 180 °, parallel returning enters another optical fiber collimator 1 and export.Drive ball screw 33 rotations by rotation adjusting knob 31, feed screw nut 1 is converted into rectilinear motion by rotatablely moving of ball screw 33, thereby driving prism of corner cube 2 moves around along ball screw 33, adjust the distance between optical fiber collimator 1 and prism of corner cube 2, reach the purpose of accurate control lag.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (5)
1. the accurate fibre delay line based on prism of corner cube, it is characterized in that: comprise optical fiber collimator, prism of corner cube, ball-screw and package casing, two optical fiber collimators are arranged on an end of package casing, prism of corner cube and ball-screw are placed in package casing, the string face of prism of corner cube is relative with the optical emission exit of optical fiber collimator, the string face of described prism of corner cube is coated with anti-reflection film, three conical surfaces are coated with and increase anti-film, prism of corner cube is fixed in lens mount, and lens mount is connected with ball-screw by contiguous block.
2. the accurate fibre delay line based on prism of corner cube according to claim 1, it is characterized in that: described optical fiber collimator comprises single-mode fiber, stainless-steel tube, GRIN Lens and globe lens, GRIN Lens and globe lens are installed in stainless-steel tube successively, and stainless-steel tube connects single-mode fiber near an end of GRIN Lens.
3. the accurate fibre delay line based on prism of corner cube according to claim 2, it is characterized in that: described ball-screw comprises adjusting knob, shaft coupling, ball screw, feed screw nut one, feed screw nut two and motion circle, adjusting knob is connected with ball screw by shaft coupling, feed screw nut one is threaded with ball screw, feed screw nut two and motion snare are connected on ball screw, and feed screw nut two circle that will move connects as one with feed screw nut one.
4. the accurate fibre delay line based on prism of corner cube according to claim 3 is characterized in that: lens mount is connected with the motion circle by contiguous block.
5. the accurate fibre delay line based on prism of corner cube according to claim 4, it is characterized in that: on lens mount, symmetry is offered spring eye, mounting spring in spring eye, spring, in compressive state, arranges steel ball between spring and package casing inwall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203467806U CN203337857U (en) | 2013-06-18 | 2013-06-18 | A precise fiber delay line based on a pyramid prism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203467806U CN203337857U (en) | 2013-06-18 | 2013-06-18 | A precise fiber delay line based on a pyramid prism |
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| Publication Number | Publication Date |
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| CN203337857U true CN203337857U (en) | 2013-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203467806U Expired - Fee Related CN203337857U (en) | 2013-06-18 | 2013-06-18 | A precise fiber delay line based on a pyramid prism |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293604A (en) * | 2013-06-18 | 2013-09-11 | 中国工程物理研究院流体物理研究所 | Pyramid-prism-based precise FDL (fiber delay line) and method for precise delay control |
| CN107346050A (en) * | 2017-07-31 | 2017-11-14 | 美国通用光电公司 | A kind of compact optical delayer |
-
2013
- 2013-06-18 CN CN2013203467806U patent/CN203337857U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293604A (en) * | 2013-06-18 | 2013-09-11 | 中国工程物理研究院流体物理研究所 | Pyramid-prism-based precise FDL (fiber delay line) and method for precise delay control |
| CN103293604B (en) * | 2013-06-18 | 2015-11-18 | 中国工程物理研究院流体物理研究所 | Based on the accurate fibre delay line of prism of corner cube and the method for accurate Time delay control |
| CN107346050A (en) * | 2017-07-31 | 2017-11-14 | 美国通用光电公司 | A kind of compact optical delayer |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131211 Termination date: 20140618 |
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| EXPY | Termination of patent right or utility model |