CN2543078Y - Photoswitch device - Google Patents

Abstract

An optical switch comprises an input device, an output device, a light path converting device and a driving device, wherein, the input device and the output device have the same structure, which both comprises a multi optical fiber base pin with a plurality of internally arranged fibers; the light path converting device comprises a first lens and a second lens. Driven by the driving device, the first lens transfers light beam which comes from the input device into light beam which is transmitted along a special direction, the second lens then changes the direction of the light beam and inputs the light beam into the output device.

Description

Optical switch device

[technical field]

The utility model relates to a kind of optical switch device, and especially about a kind of mechanical optical switch device, this optical switch device adopts the mode of relay lens to realize the conversion of light path.

[background technology]

As a kind of each signal path in optical transmission line or the integrated optical circuit is changed or the device of logical operation mutually, photoswitch is widely used in optical fiber telecommunications system, optical fiber network system, optical fiber measurement system and optical fiber sensing system etc.

According to different principle of work, photoswitch can be divided into mechanical optical switch and non-mechanical optical switch two big classes.Mechanical optical switch utilization machinery, electromagnetic mode are moved optical fiber or optical element, thereby realize the switching of light beam between different output ports.Wherein, moving fiber type photoswitch is realized the switching of light path by moving fiber, but because of fibre diameter is little, is easy to produce flexural deformation in the moving process, and it is bigger to cause inserting loss, influences optical signal transmission.And the input end fiber of mobile optical element type photoswitch and output terminal optical fiber maintain static, and by the switching that moving of optical element reached light path, it is lower that this kind photoswitch inserts loss, generally is not more than 2dB; Isolation is higher, generally greater than 45dB; And not being subjected to the influence of wavelength and polarization, is present comparatively a kind of mechanical optical switch of widespread usage.

A kind of prior art mechanical optical switch can be consulted United States Patent (USP) the 5th, 420, and No. 946 (Fig. 1 reference), it comprises a stationary platform 600, an input media 610, a plurality of output unit 620 and a reflection unit 630.Wherein, this stationary platform 600 is used for fixing this input media 610, output unit 620 and reflection unit 630, this input media 610 comprises an input optical fibre 611 and a GRIN Lens 612, each output unit 620 comprises an output optical fibre 621 and a GRIN Lens 622 respectively, reflection unit 630 is arranged in the central mounting hole 601 of stationary platform 600, the pedestal 632 that comprises a catoptron 631 and fixing catoptron 631, this pedestal 632 are offered one and are used for cooperating the external driver device pilot hole 633 of (figure does not show).This input media 610 is perpendicular to stationary platform 600, and with catoptron 631 in angle of 45 degrees, these a plurality of output units 620 are roughly circular to be arranged in around the reflection unit 630, by external driver device selectivity rotary reflection device 630, can make input beam from 621 outputs of different output optical fibres.Because the light path tool reversibility of this photoswitch also can be selected to make input light from the input of one of many output optical fibres 621, and transfer to input media 610.

Yet the prior art mechanical optical switch has some defectives.At first, this photoswitch makes that optical switch construction complexity adjustment process huge and input media 610 and a plurality of output unit 620 is very various because each output unit 620 is discrete each other.Secondly, because each output unit 620 comprises an output optical fibre 621 and a GRIN Lens 622 respectively, make that this photoswitch cost is higher and the insertion loss is big, switching speed is low.Once more, this photoswitch can't expand the number of input media 610, can't realize that promptly the input beam selectivity transfers to one of a plurality of output units from one of a plurality of input medias.

[utility model content]

The purpose of this utility model is to provide a kind of compact conformation, cost is low and switching speed and the preferable optical switch device of other optical property.

The utility model is achieved in that provides a kind of optical switch device that comprises an input media, an output unit, an optical path switching device and a drive unit, wherein, this input media is identical with the output unit structure, include many optical fiber contact pins of a built-in multifiber, this optical path switching device comprises one first lens and one second lens.Under drive unit drives, these first lens will change into along the light beam of specific direction transmission behind the input beam collimation from input media, and these second lens make the direction deviation of this light beam and focus to the interior specific output optical fibre of output unit.

Compared with prior art, the utlity model has following advantage: adopt the combination of many optical fiber contact pins and two lens because of the utility model optical switch device, can greatly reduce the lens number, thereby reduce cost and make overall optical construction of switch compactness, and improve whole optical property.In addition, when many optical fiber contact pins and lens alignment, can realize the adjustment between input optical fibre, output optical fibre and the lens in the lump, thereby reduce work hours.

[description of drawings]

Fig. 1 is the stereographic map of prior art photoswitch.

Fig. 2 is the stereographic map of the utility model optical switch device.

Fig. 3 is the sectional view of Fig. 2 along the III direction.

Fig. 4 is the sectional view of Fig. 2 along the IV direction.

Fig. 5 and Fig. 6 are the light path synoptic diagram of the utility model optical switch device.

[embodiment]

Please refer to Fig. 2 and Fig. 3, the utility model optical switch device 10 comprises the input media 100 of four input optical fibres 101 of a tool, output unit 200, an optical path switching device 300 and a drive unit 400 of four output optical fibres 201 of a tool.This photoswitch 10 further comprises a base 500 in order to the fixing said apparatus, and this base 500 comprises a substrate 501.During work, this optical path switching device 300 makes from the specific output optical fibre 201 of the beam Propagation to of an input optical fibre 101 under drive unit 400 controls.

This input media 100 is fixed in a location-plate 502 from substrate 501 extensions, and it comprises many optical fiber contact pins 110 of built-in four input optical fibres 101.These many optical fiber contact pins 110 roughly become cylindric, offer a through hole 111 that holds these four input optical fibres 101 in it, the end of this input optical fibre 101 (not indicating) is concordant with an end face 112 of many optical fiber contact pins 110, and for improving return loss, it is the dip plane of 6 degree to 8 degree that this end face 112 is ground into the inclination angle.These many optical fiber contact pins 110 suits are immobilizated in the quartz socket tube 130, for further protecting this input media 100, a sheathed metal sleeve 140 outside quartz socket tube 130.

This output unit 200 is identical with the structure of input media 100, comprises many optical fiber contact pins 210 of built-in four output optical fibres 201.This output unit 200 also is fixed in a location-plate 503 from substrate 501 extensions.

This optical path switching device 300 comprises one first die casting lens 310 and one second die casting lens 320, these first die casting lens 310 will be in order to will be parallel beam and to transfer to the second die casting lens 320 that these 320 on second die casting lens make this parallel beam generation deviation and focus to output unit 200 from the beam collimation of input media 100.These die casting lens 310 roughly become cylindric, itself and many optical fiber contact pins 110 opposing end faces 311 are the aspheric curve structure, other end 312 is the dip plane of 6 degree to 8 degree through grinding also, by refraction law as can be known, beam Propagation is to end face 312, because of incident direction does not overlap with end face 312 normal directions, deviation will take place in light beam.Die casting lens 320 are identical with the structure of die casting lens 310, also can adopt other to have the lens of alignment function, realize light path deviation effect as alternative die casting lens 310,320 such as GRIN Lens.

Cooperate and consult Fig. 4, this drive unit 400 comprises that one cooperates first driving mechanism 410 of the first die casting lens 310, second driving mechanism 430, one second follower 440 that one first follower 420 and cooperates the second die casting lens 320.This first driving mechanism 410 comprises a drive link 411 and is positioned at the driven wheel 412 of drive link 411 1 ends that the other end of drive link 411 then suit is immobilizated in the fixed block 504, and cooperates with external control device (figure does not show).This fixed block 504 extends from substrate 501 and forms, and offers a pilot hole 505 in order to the end of accommodating drive link 411.This first follower 420 comprises a cylindrical body 421, offer one in it in order to accommodate the through hole 422 of these first die casting lens 310 of Gu Na, the both ends of cylindrical body 421 (not indicating) are immobilizated in the follower holder 506, this follower holder 506 forms from substrate 501 extensions, comprise a bottom 507 and 507 two sides 508 of extending from the bottom, the mounting hole 509 in order to the both ends that hold this cylindrical body 421 is all laid in this two side 508, these cylindrical body 421 middle parts form a follower gear 423, the driven wheel 412 of this follower gear 423 in order to cooperate first driving mechanism 410, and then drive 310 rotations of the first die casting lens, will change parallel beam into from the light beam of input media 100 and transfer to the second die casting lens 320.This first driving mechanism 410 also can adopt belt pulley to drive first follower 420.

The structure of this second driving mechanism 430 and second follower 440 is identical with the structure of first driving mechanism 410 and first follower 420, under externally control device drives, drive 320 rotations of the second die casting lens, and then will transfer to output unit 200 behind the light beam generation deviation from the first die casting lens 310.

Please refer to Fig. 5, is the light path synoptic diagram of the utility model optical switch device.Collimate behind the end face 311 of the first die casting lens 310 from the light beam of input optical fibre 1011 and to be directional light, because changing a light beam along the specific direction transmission into, refraction effect is incident to the second die casting lens 320 during end face 312 by the first die casting lens 310, the end face 322 of the second die casting lens 320 makes this beam Propagation direction generation deviation, and this light beam is with after the end face 321 of the second die casting lens 320 converges to specific output optical fibre 2011.In the lump with reference to figure 3 and Fig. 6, rotation by the drive unit 400 controls second die casting lens 320, in the time of can making from the light beam of the first die casting lens 310 by the second die casting lens 320, deviation direction is corresponding changes for it, thereby will focus to different output optical fibre 2012 when the second die casting lens 320.Equally, by the rotation of the drive unit 400 control first die casting lens 310, be incident to second lens 320 after can making light beam generation deviation from different input optical fibres 101.Therefore, drive first lens 310 and/or 320 rotations of second lens, can realize the conducting of different input optical fibres 101 and output optical fibre 201 by drive unit 400.

Claims (9)

1. optical switch device, comprise an input media, an optical path switching device, an output unit and a drive unit, it is characterized in that: this optical path switching device is between input media and output unit, comprise at least two lens, input media comprises many optical fiber contact pins of built-in many input optical fibres, output unit comprises many optical fiber contact pins of built-in many output optical fibres, the rotation under drive unit drives of these at least two lens, thus optionally input beam is transferred to a specific output optical fibre from an input optical fibre.

2. optical switch device as claimed in claim 1 is characterized in that: these lens can be GRIN Lens.

3. optical switch device as claimed in claim 1 is characterized in that: these lens can be the die casting lens.

4. optical switch device as claimed in claim 3 is characterized in that: an end face of these lens can be an inclined-plane, in order to the light beam deviation.

5. optical switch device as claimed in claim 4 is characterized in that: the other end of these lens is an aspheric curve.

6. optical switch device as claimed in claim 1 is characterized in that: this drive unit comprises a plurality of driving mechanisms and a plurality of follower, and each driving mechanism can drive corresponding follower.

7. optical switch device as claimed in claim 6 is characterized in that: a through hole can be offered in this follower inside, to hold respective lens.

8. optical switch device as claimed in claim 7 is characterized in that: these lens can rotate under this follower drives, to select light beam.

9. optical switch device as claimed in claim 1 is characterized in that: this optical switch device further comprises a base, in order to this input media of fixing, output unit, optical path switching device and drive unit.

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