CN2546891Y

CN2546891Y - Reflective photoswitch

Info

Publication number: CN2546891Y
Application number: CN01258113U
Authority: CN
Inventors: 廖上秦; 吴熴灿
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2001-11-15
Filing date: 2001-11-15
Publication date: 2003-04-23
Anticipated expiration: 2011-11-15

Abstract

The utility model relates to a reflective optical switch, which adopts two double-side reflective mirrors as an optical path switch device, the two double-face reflective mirrors are arranged fixedly on the same seat and are respectively provided with two parallel reflective faces having inverse reflective directions. The optical path switch device is used for rotation so that the optical path performs the reflection on different reflective faces of the double-face reflective mirror and the input beam can be outputted selectively from different output device, thereby performing optical path switch.

Description

The reflection type optical switch

[technical field]

The utility model is about a kind of photoswitch, particularly about a kind of reflection type optical switch that only utilizes two double mirrors exchange light signal.

[background technology]

Photoswitch is a kind of all signal paths in optical transmission line or the integrated optical circuit to be changed or the device of logical operation mutually, it is widely used in optical communication, can be used for optical fiber telecommunications system, optical fiber network system, optical fiber measurement system and optical fiber sensing system etc., playing the effect that light path is switched, is one of optical element indispensable in the optical communication field.

According to the photoswitch principle of work, it can be divided into mechanical type photoswitch and on-mechanical type photoswitch two big classes.The mechanical type photoswitch is to utilize machinery, electromagnetic mode etc. that optical fiber or optical element are moved, thereby realizes the switching of light beam between different output ports.Wherein moving fiber type photoswitch is to realize the light path switching by moving fiber, and its research and development time is morning, but less because of fibre diameter, occurs flexural deformation easily in frequent switch moving process, causes the light signal loss bigger, influences the optical signal transmission quality.Mobile optical element type photoswitch is another kind of mechanical type photoswitch, moves or rotating optical element by electromechanical means, and input light is connected with different output ports, thereby realizes the switching of light path.It is low that this kind photoswitch inserts loss, generally is not more than 2dB; The isolation height is generally greater than 45dB; And be not subjected to polarization and wavelength affects.The optical element that is applicable to this kind photoswitch comprises catoptron, lens, prism and shield etc.

Be illustrated in figure 1 as United States Patent (USP) the 5th, 436, a kind of photoswitch that is disclosed for No. 986, it comprises four optical fiber: one first input optical fibre 101, one second input optical fibre 103, one first output optical fibre 102, one second output optical fibre 104, each optical fiber is all fixed.Each optical fiber front end is equipped with a gradual index lens 111,112,113 and 114, the input beam that can collimate first input optical fibre 101 and second input optical fibre 103 becomes directional light, and directional light converged makes it to enter respectively first output optical fibre 102 or second output optical fibre 104.

First input optical fibre 101 and second output optical fibre 104 are staggered relatively, and second input optical fibre 103 and first output optical fibre 102 are staggered relatively simultaneously.Arrangement of mirrors 200 is between above-mentioned each relative optical fiber, and it comprises first catoptron 201, second catoptron 202 and base 203.First catoptron 201 and second catoptron 202 all have two reflectings surface in a certain angle, and are fixed on the base 203.Catoptron 201,202 equal triangularities.Arrangement of mirrors 200 can slidably reciprocate on unmagnetized rod 303 with magnetization right cylinder 302 by the fixing rod 301 that links to each other with base 203 under the effect of electric current forward or backwards, and retainer 306,307 is used to limit the extreme position that arrangement of mirrors 200 slides.The coil 304,305 that is wound under the effect of electric current on the soft iron makes the magnetic field of soft iron generation drive magnetization right cylinder 302 in first retainer 306 and 307 slips of second retainer, thereby change the position of arrangement of mirrors 200, switch effect to realize light path.

When feeding forward current, magnetization right cylinder 302 is inhaled mutually with coil 304 heteropoles, and with coil 305 homopolar-repulsions, then arrangement of mirrors 200 is shifted to coil 304 directions, makes arrangement of mirrors 200 leave the exchange light path simultaneously.At this moment, the light signal that first input optical fibre 101 is imported then directly enters second output optical fibre 104 and output, and the light signal that second input optical fibre 103 is imported then directly enters first output optical fibre 102 and output.When feeding inverse current, magnetization right cylinder 302 and coil 304 homopolar-repulsions are inhaled mutually with coil 305 heteropoles simultaneously, and then arrangement of mirrors 200 is shifted to coil 305 directions, makes arrangement of mirrors 200 be arranged in light path.At this moment, the light signal that first input optical fibre 101 is imported then enters first output optical fibre 102 and output through the reflecting surface reflection of catoptron 201 and catoptron 202, and the light signal that second input optical fibre 103 is imported then enters second output optical fibre 104 and output through another reflecting surface reflection of catoptron 201 and catoptron 202.

Because the catoptron 201 and 202 of this kind photoswitch has two fixed reflection surfaces separately, this two reflecting surface reflects different light signals respectively, but be fixed on the same catoptron, and move into or shift out light path simultaneously, need adjust the relative position of each catoptron and optical fiber and the relative position between two mirror surfaces simultaneously, so in manufacture process, each state at photoswitch all needs the indivedual positions of two catoptrons, relative position relation and output and input optical fibre position are adjusted simultaneously, the parameter of required adjustment is various, therefore, cause on making degree of difficulty bigger, and the light path of one of them on off state needs through two secondary reflections, and make loss increase.

[summary of the invention]

The purpose of this utility model is to provide the reflection type optical that a kind of processing procedure is simple and loss is less switch.

For realizing the utility model purpose, the utility model reflection type optical switch comprises first optical input device, first light output arrangement, second optical input device, second light output arrangement and an optical path switching device.Wherein, optical path switching device comprises the first, second, third and the 4th reflecting surface, the wherein parallel and opposing setting of the first, the 4th reflecting surface, second, third reflecting surface is parallel and be oppositely arranged, when two pairs of reflectings surface opposing or that be oppositely arranged alternately move into light path, input to output and only can finish the light path conversion through primary event.

Compared to prior art, the light path conversion of the utility model reflection type optical switch only utilizes the reflection of light principle, size and accuracy requirement for reflecting element are lower, be easy to realize, and arbitrary light path of arbitrary switching state is all only through primary event, make the characteristic of each light path more approaching, also reduce through the loss of repeatedly reflecting or refraction causes.

[description of drawings]

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

Fig. 2 is the stereographic map that the utility model reflection type optical switch is in first state.

Fig. 3 is the stereographic map that the utility model reflection type optical switch is in second state.

Fig. 4 is the light path synoptic diagram that the utility model reflection type optical switch is in first state.

Fig. 5 is the light path synoptic diagram that the utility model reflection type optical switch is in second state.

[embodiment]

See also Fig. 2, the utility model reflection type optical switch 80 comprises a lid 12, base 11, first optical input device 20, first light output arrangement 30, second optical input device 40, second light output arrangement 50, optical path switching device 60 and drives electric control gear 70.

Light input and

output unit

20,30,40,50 are fixed in relevant position on the base 11 respectively with retaining element 111, and the centre position of base 11 is provided with a groove 115, this groove 115 can ccontaining optical path switching device 60 in wherein.Lid 12 can cooperate formation one accommodation space to take in elements such as optical path switching device 60, input and

output unit

20,30,40,50 with base 11; the sidewall of lid 12 is provided with four stress buffer devices 121; its position is with respect to the light input and the

output unit

20,30,40,50 that are fixed on the base 11, in order to protect and to prevent that fibre-optical bending from excessively rupturing.

First optical input device 20 is all identical with first output unit 30, second optical input device 40 and second output unit, 50 structures, is the example explanation at this with first optical input device 20, it is to be made of optical fiber 21, sleeve pipe 22 and collimating element 23, wherein in optical fiber 21 insertions and the fixed sleeving 22, it is terminal concordant with sleeve pipe 22 end faces, collimate with collimating element 23 simultaneously, and cementing agents bondings such as sleeve pipe 22 end faces and collimating element 23 employing epoxy resin, and fixed.

Optical path switching device 60 comprises two double mirrors (61,62), a base plate 63 and a rotation platform 64.Wherein first double mirror 61 and second double mirror 62 are fixed on the above-mentioned base plate 63, first double mirror 61 has two reflectings surface 611,612 (showing as Fig. 4), second double mirror 62 has two reflectings surface 621,622 (showing as Fig. 4), first reflecting surface 611 and the 622 opposing settings of the 4th reflecting surface, second reflecting surface 612 and the 3rd reflecting surface 621 are provided with in opposite directions, and above-mentioned reflecting surface 611,612,621,622 is parallel to each other and perpendicular to plane, input and output light beam place, between input and the formed light path of output beam.Rotation platform 64 is placed in the groove 115 of above-mentioned base 11 centres, and base plate 63 is fixed on the rotation platform 64.Driving electric control gear 70 can adopt the step-servo motor of microprocessor control or relay that rotation platform 64 is rotated.The power that is fixed in the driving electric control gear 70 that two double mirrors (61,62) on the base plate 63 can transmit by rotation platform 64 simultaneously is rotated, make the different reflectings surface 611,622 or 612,621 of

double mirror

61,62 move into or shift out light path, thereby realize the light path switching.

Please cooperate with reference to Fig. 2 and Fig. 4, when reflection type optical switch 80 is in first state, first reflecting surface 611 of first double mirror 61 and the 4th reflecting surface 622 of second double mirror 62 are arranged in light path, and first reflecting surface 611 and the 4th reflecting surface 622 are relative with first optical input device 20 and second optical input device 40 respectively, the light beam of first optical input device, 20 inputs is reflected by first reflecting surface 611, and through 30 outputs of first light output arrangement; Light beam from 40 inputs of second optical input device is reflected by the 4th reflecting surface 622 simultaneously, and through 50 outputs of second light output arrangement.After optical path switching device 60 rotates 180 °, reflection type optical switch 80 also has identical functions, but, first reflecting surface 611 is reflection light beams from second optical input device 40, through 50 outputs of second light output arrangement, and the 4th reflecting surface 622 is reflection light beams from first optical input device 20, through 30 outputs of first output unit.

Please be simultaneously with reference to Fig. 3 and Fig. 5, when reflection type optical switch 80 is in second state, behind optical path switching device 60 half-twists, first reflecting surface 611 and the 4th reflecting surface 622 shift out light path, second reflecting surface 612 and the 3rd reflecting surface 621 move into light path, then after light beam incident second reflecting surface 612 reflections of first optical input device, 20 inputs, from 50 outputs of second light output arrangement; Simultaneously after light beam incident the 3rd reflecting surface 621 reflections of second optical input device, 40 inputs, from 30 outputs of first light output arrangement.Or after optical path switching device 60 rotates 270 °, reflection type optical switch 80 also has identical functions, but, second reflecting surface 611 is reflection light beams from second optical input device 40, through 30 outputs of first light output arrangement, and the 3rd reflecting surface 621 is reflection light beams from first optical input device 20, through 50 outputs of first output unit.

Embodiment of the present utility model is as optical path switching device with two double mirrors, but, be appreciated that ground, also two double mirrors can be replaced into four catoptrons, or two pairs of coefficient catoptrons are divided on the different bases, alternately move in and out light path, can finish the light path conversion that each state only needs primary event equally.

Claims

1. reflection type optical switch, it comprises: one first optical input device, in order to input optical signal to photoswitch; One second optical input device, in order to input optical signal to photoswitch; One first light output arrangement is selected to accept to export from photoswitch from the light signal of one of first optical input device or second optical input device; One second light output arrangement is selected to accept to export from photoswitch from the light signal of one of first optical input device or second optical input device; An and optical path switching device, it is characterized in that: this optical path switching device comprises the first, second, third and the 4th reflecting surface, the wherein parallel and opposing setting of the first, the 4th reflecting surface, second, third reflecting surface is parallel and be oppositely arranged, when two pairs of reflectings surface opposing or that be oppositely arranged alternately move into light path, input to output and only can finish the light path conversion through primary event.

2. reflection type optical switch according to claim 1 is characterized in that: wherein first, second reflecting surface of this optical path switching device forms first double mirror.

3. reflection type optical switch according to claim 2 is characterized in that: the 3rd, the 4th reflecting surface of this optical path switching device forms second double mirror.

4. reflection type optical switch according to claim 3 is characterized in that: this first, second double mirror is parallel to each other.

5. reflection type optical switch according to claim 3 is characterized in that: this first, second double mirror is perpendicular to input, plane, output beam place.

6. reflection type optical switch according to claim 1 is characterized in that: this optical path switching device can further comprise base plate, is used for fixing above-mentioned two double mirrors.

7. reflection type optical switch according to claim 6 is characterized in that: this base plate is fixed in one by on the rotation platform that drive unit drove.

8. reflection type optical switch according to claim 1 is characterized in that: the first, the 4th reflecting surface is located at same base, and second, third reflecting surface is located at another base simultaneously, and this two base drives two pairs of reflectings surface and alternately moves in and out light path.

9. reflection type optical switch according to claim 8 is characterized in that: four reflectings surface of this optical path switching device are all perpendicular to input, plane, output beam place.