CN1427277A - 1*2 mechanical optical switch - Google Patents
1*2 mechanical optical switch Download PDFInfo
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- CN1427277A CN1427277A CN 02145327 CN02145327A CN1427277A CN 1427277 A CN1427277 A CN 1427277A CN 02145327 CN02145327 CN 02145327 CN 02145327 A CN02145327 A CN 02145327A CN 1427277 A CN1427277 A CN 1427277A
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- prism
- platform
- collimating apparatus
- relay
- optical switch
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Abstract
A 1X2 mechanical light switch for optical signal switching is composed of a fixed prism on the second platform of base, a movable prism fixed to the end of the cantilever of relay, input collimator and two output collimators. Said collimators are parallelly arranged on a fixture. Its advantages are electromagnetic drive, short switching time, no light beam interference, compact structure and small size.
Description
Technical field
The present invention relates to a kind of 1 * 2 mechanical optical switch, particularly relate to a kind of light path of 1 * 2 mechanical optical switch.The present invention is applied to the light signal exchange in light communication system, optical fiber network system, optical fiber measurement system or instrument and the optical fiber sensing system.
Background technology
In optical fiber network system, transmission of Information is transmitted realization by light signal in optical fiber.Though transmission and electric signal the transmission in plain conductor of light signal in optical fiber has certain similarity, however well-known be to switch to the different output optical fibres light signal more much more difficult by the switching of electronic switch from input optical fibre than electric signal.
Can realize easily when electric signal transmits in plain conductor connecting, and light signal will enter output optical fibre from input optical fibre point-device coupling must be arranged, otherwise the loss of light intensity will be very serious.Now, the xsect of the single-mode fiber that generally uses in optical network system is very little, and its core diameter only is about 9 microns, and its acceptable angle (numerical aperture) is also very little, in order to ensure transfer efficiency, incident light must be positioned in the numerical aperture.Therefore, be used for that the photoswitch that input light switches to different output ports must be had very high precision.
Because the application of photoswitch is very extensive, formerly technology has a lot of patents of invention about photoswitch.The patent No. that United States Patent (USP) trademark office announced on May 7th, 1984 be 4589726 " rotary photoswitch " it be mainly used in 2 * 2 photoswitches, one right-angle prism rotation, 90 degree are finished the switching of light path with stepper motor.This invention exists the following problem, at first is that the switch speed of stepper motor is very slow, and switching time is usually more than 15 milliseconds, and Modern Communication System to the requirement of photoswitch switching time usually below 10 milliseconds; Secondly a prism has only been adopted in this invention, in adjustment, exist the problem of very thorny mutual interference, because the switching of light path is to guarantee by the rotation of prism on mutual direction, after adjusting what a direction, just be difficult to guarantee the coupling of light path on another direction, and the adjustment of light path expends time in very much, therefore should invention have very big problem on manufacturability.
The patent No. that United States Patent (USP) trademark office announced on May 9th, 1993 is the invention of 4589726 " equipment and the methods that are used for signal exchange between the optical fiber ", this invention by the isosceles right angle total reflection prism of two relative right angle faces plating reflectance coatings immigration and shift out light path and realize that light signal exchanges.In this invention, because a prism must be between two GRIN Lens when prism shifts out light path, therefore the relative broad of distance between two GRIN Lens, it is very big that thereby the size that causes whole switch becomes, and can not satisfy the Modern Communication System demand more and more littler to the switch dimensional requirement; Secondly, each prism need plate highly reflecting films in this invention on two right angle faces, has increased the cost of switch; In addition, the input end of light signal and output terminal are positioned at the both sides of switch in this invention, are not easy in the optical communication system integrated to switch.
Summary of the invention
Mechanical optical switch of the present invention provides a kind of 1 * 2 mechanical optical switch in order to overcome the deficiency of technology formerly, with the light channel structure of novelty, realizes 1 * 2 photoswitch.
The structure of 1 * 2 mechanical optical switch of the present invention is shown in Fig. 1,2,3,4,5,6,7,8.It comprises: the pedestal 1 of band loam cake 9, first platform, 101, the second platforms 102 and collimating apparatus anchor clamps 103 on the pedestal 1, relay 2, semi-girder 3, fixed prism 4, movable prism 5, input collimating apparatus 6, the first output collimators, 7, the second output collimators 8 and loam cake 9.
Being second platform 102 on the centre position on the pedestal 1, is first platform 101 on second platform 102 pedestal 1 on one side, is collimating apparatus anchor clamps 103 on the another side pedestal 1 of second platform 102.Fixed prism 4 is seated on second platform 102.Input collimating apparatus 6, first output collimator 7 and second output collimator 8 are seated on the same collimating apparatus anchor clamps 103 in parallel to each other.On first platform 101, be equipped with relay 2, have semi-girder 3 on the relay 2, on the end of semi-girder 3, be fixed with movable prism 5.
Said relay 2 is the relay of single-pole double-throw (SPDT), and it comprises: power supply input pin 201, the movable terminal 202 on the relay 2, input pin 203,204,205, contact 206,207.
Said fixed prism 4 is an isosceles right angle total reflection prism, comprising: inclined-plane 401, the first right angle faces, 402, the second right angle faces 403.Be coated with the anti-reflection film of penetrating on the surface on inclined-plane 401.Fixed prism 4 places on second platform 102, and its inclined-plane 401 is perpendicular to the central axis of input collimating apparatus 6.And aim at and import the collimating apparatus 6 and first output collimator 7.
Said movable prism 5 is a rhombic prism, comprising: beam incident surface 501, the first reflectings surface, 502, the second reflectings surface 503 and light beam exit facet 504.Beam incident surface 501 and light beam exit facet 504 are parallel to each other, and two surfaces are coated with the anti-reflection film of penetrating.Movable prism 5 is to be fixed on the end of semi-girder 3.Two reflectings surface 502,503 are parallel to each other.When movable prism 5 moves into light path, the beam incident surface 501 of movable prism 5 and inclined-plane 401 opposing parallel of fixed prism 4.The light beam exit facet 504 of movable prism 5 is aimed at second output collimator 8.And perpendicular to the central axis of second output collimator 8.
Loam cake 9 as Fig. 8 is to be used for the core parts that are seated on the pedestal 1 are built, and seals.
The relative position of fixed prism 4 and movable prism 5: as shown in Figure 2, the 4 logical light time of fixed prism, isosceles right angle total reflection prism as fixed prism 4 is positioned at the place ahead of importing the collimating apparatus 6 and first output collimator 7, and inclined-plane 401 is that beam incident surface is vertical with incident light; When the movable 5 logical light time of prism, as shown in Figure 5, movable prism 5 is between fixed prism 4 and two output collimators 7,8, and the beam incident surface 501 of movable prism 5 is the light beam exit facet of fixed prism 4 facing to the inclined-plane 401 of fixed prism 4.The light beam exit facet 504 of movable prism 5 is facing to second output collimator 8.
As Fig. 4, shown in Figure 5, after relay 2 energisings, relay 2 produces suction, adhesive movable terminal 202, thus the movable prism 5 that drives semi-girder 3 ends inserts in the light path.Movable terminal 202 drives contact 206 disconnections simultaneously, contact 207 adhesives, the duty of the relay 2 just conducting between 203 and 204 becomes conducting between 204 and 205, if external circuits just can be realized judgement to the photoswitch input/output state on pin.This moment, incident light was through inclined-plane 401 incidents of input collimating apparatus 6 from fixed prism 4, through 401 outgoing from the inclined-plane again after twice total reflection of right-angle side 402,403, reenter the beam incident surface 501 that is mapped to movable prism 5, twice total reflection of two reflectings surface 502,503 of the movable prism 5 of process, from 504 outgoing of light beam exit facet, received by second output collimator 8.
As Fig. 1, Fig. 2, shown in Figure 3, after relay 2 outages, the electromagnetic force that relay 2 is kept the adhesive effect disappears, movable terminal 202 bounce-backs, thus the movable prism 5 that drives semi-girder 3 ends shifts out light path.Movable terminal 202 drives contact 207 disconnections simultaneously, contact 206 adhesives, the duty of the relay 2 just conducting between 204 and 205 becomes conducting between 204 and 203, if external circuits just can be realized judgement to photoswitch light path input/output state on pin.At this moment, inclined-plane 401 incidents that incident light passes fixed prism 4 through input collimating apparatus 6, through the first right angle face 402 of fixed prism 4 and twice total reflection of the second right angle face 403, light beam passes the inclined-plane 401 of fixed prism 4 once more, and through 7 outgoing of first output collimator.
The invention has the beneficial effects as follows and adopted an isosceles right angle total reflection prism and a rhombic prism, utilize total reflection principle to realize the exchange of light path.Compare with the invention of the patent No. 4589726 of the United States Patent (USP) trademark office announcement of technology formerly, the present invention is owing to adopted Electromagnetic Drive, and light signal is short switching time, and be 6 milliseconds typical switching time, and be 10 milliseconds switching time the longest; The present invention has solved the mutual interference problem when beam path alignment well owing to adopted an isosceles right angle total reflection prism and a rhombic prism, and production efficiency is greatly improved.Compare with the patent No. 5436986 of the United States Patent (USP) trademark office announcement of technology formerly, each prism only needs to provide cost savings at the anti-reflection film of penetrating of plane of incidence plating among the present invention; Secondly, the distance among the present invention between the collimating apparatus is very little, and compact conformation has reduced the size of switch; Also have the present invention that incident end and exit end are placed a side, not only optimized space layout, further given prominence to compact conformation, advantage that volume is little, be convenient to very much the integrated of system.
Description of drawings
Fig. 1 is the schematic side view of 4 logical light time of 1 * 2 mechanical optical switch fixed prism of the present invention.
Fig. 2 is the light path synoptic diagram of 4 logical light time of 1 * 2 mechanical optical switch fixed prism of the present invention.
Fig. 3 is the general effect synoptic diagram figure of 4 logical light time of 1 * 2 mechanical optical switch fixed prism of the present invention.
Fig. 4 is 1 * 2 mechanical optical switch of the present invention schematic side view of movable 5 logical light time of prism.
Fig. 5 is 1 * 2 mechanical optical switch of the present invention light path synoptic diagram of movable 5 logical light time of prism.
Fig. 6 is 1 * 2 a mechanical optical switch decomposing schematic representation of the present invention.
Fig. 7 is after 1 * 2 mechanical optical switch of the present invention removes loam cake 9, inner general structure synoptic diagram.
Fig. 8 is the synoptic diagram of the loam cake 9 of 1 * 2 mechanical optical switch of the present invention.Fig. 8-the 1st wherein, the schematic internal view of loam cake 9.Fig. 8-the 2nd, the outer shape synoptic diagram of loam cake 9.
Embodiment
The structure of the invention described above shown in Fig. 1,2,3,4,5,6,7,8 dropped in actual the use, be applied in the light top and bottom path module (OADM) of optical communication system.
Said pedestal 1 is that stainless steel is made.Relay 2 is relays of single-pole double-throw (SPDT), 5 volts of rated voltages, 28.1 milliamperes of rated current.Semi-girder 3 on the relay 2 is iron-nickel alloy materials.The material of fixed prism 4 and movable prism 5 is a K9 glass.Movable prism 5 usefulness glue are fixed on the end of semi-girder 3.Fixed prism 4 usefulness glue are fixed on second platform 102.
The characteristic dimension of photoswitch of the present invention is 38 millimeters of length, 14 millimeters of width, 13 millimeters of height, ideal format is: light signal switching time is 8 milliseconds, inserting loss one end (fixed prism 4 logical light) is 0.35dB, and the other end (movable prism 5) is 0.40dB, switches repeatability ± 0.02dB, return loss 62dB, serviceable life 1 * 10
7Inferior.
Claims (4)
1, a kind of 1 * 2 mechanical optical switch, comprise the pedestal (1) that has loam cake (9), fixed prism (4), second platform (102) on the pedestal (1) and collimating apparatus anchor clamps (103), input collimating apparatus (6), first output collimator (7) and second output collimator (8), it is characterized in that said second platform (102) is on the centre position of pedestal (1), on second platform (102) pedestal (1) on one side is first platform (101), on the another side pedestal (1) of second platform (102), be collimating apparatus anchor clamps (103), fixed prism (4) is seated on second platform (102), input collimating apparatus (6), first output collimator (7) and second output collimator (8) are seated on the same collimating apparatus anchor clamps (103) in parallel to each other, on first platform (101), be equipped with relay (2), have semi-girder (3) on the relay (2), be fixed with movable prism (5) at the end of semi-girder (3).
2,1 * 2 mechanical optical switch according to claim 1, it is characterized in that said fixed prism (4) is an isosceles right angle total reflection prism, it places on second platform (102), its inclined-plane (401) is perpendicular to the central axis of input collimating apparatus (6), and aim at input collimating apparatus (6) and first output collimator (7), the surface of inclined-plane (401) is coated with the anti-reflection film of penetrating.
3,1 * 2 mechanical optical switch according to claim 1 and 2, it is characterized in that said movable prism (5) is a rhombic prism, its beam incident surface (501) and light beam exit facet (504) are two faces that are parallel to each other, the surface is coated with the anti-reflection film of penetrating, two parallel surfaces (502,503) are reflectings surface in addition, inclined-plane (401) opposing parallel of its beam incident surface (501) and fixed prism (4), its light beam exit facet (504) is perpendicular to the central axis of second output collimator (8), and aims at second output collimator (8).
4,1 * 2 mechanical optical switch according to claim 1 is characterized in that said relay (2) is the relay of single-pole double-throw (SPDT).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02145327 CN1427277A (en) | 2002-11-21 | 2002-11-21 | 1*2 mechanical optical switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02145327 CN1427277A (en) | 2002-11-21 | 2002-11-21 | 1*2 mechanical optical switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1427277A true CN1427277A (en) | 2003-07-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02145327 Pending CN1427277A (en) | 2002-11-21 | 2002-11-21 | 1*2 mechanical optical switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1427277A (en) |
-
2002
- 2002-11-21 CN CN 02145327 patent/CN1427277A/en active Pending
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |