CN2896311Y

CN2896311Y - MEMS optical switch

Info

Publication number: CN2896311Y
Application number: CN 200620033057
Authority: CN
Inventors: 梁联长
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-02-09
Filing date: 2006-02-09
Publication date: 2007-05-02
Anticipated expiration: 2016-02-09

Abstract

The utility model relates to a MEMS light switch, wherein the upper end face of the base is a work platform and the mid of the base is provided with a sunken cavity; the optical fiber of the input lens, the optical fibers of the primary output lens and the secondary output lens are placed on the work platform; the sunken cavity is provided with a permanent magnetic ring and an aperture is positioned on the base at the central hole of the permanent magnetic ring; a loop is arranged in the central hole of the permanent magnetic ring and the loop is a rectangular loop, the rectangular loop is arranged in the aperture in the form that the input/output end points downward and the closed end points upward, and the upper end surface of the close end is higher than the lower end surface of the optical fiber of the input lens. The optical switch has shot-time shift and the typical time for shift is 0.1mS and the longest time for shift is 0.5mS. Technically, the problems of mutual interference between the beams and instable moving of the optical fiber during the coupling of the light paths are solved, thereby improving the production efficiency. The patent of the utility model has a compact structure, low insertion loss, great interference and small size and is benefit to the system integration and the switch array.

Description

Mems optical switch

(1) technical field:

The utility model relates to a kind of photoswitch, particularly mems optical switch.

(2) background technology:

Along with the fast development of communication and information network technique, people are more and more higher to the requirement of capacity, communication speed etc., and traditional telecommunication has been difficult to meet the demands.A kind of brand-new Fibre Optical Communication Technology-optical cross connection technology that occurs will fundamentally solve the electronic bottleneck problem at present, thereby realize all optical communication.Photoswitch is the Primary Component in optical cross connection and dense wave division multipurpose (DWDM) system.Photoswitch cooperates with dense wave division multiplexer, can realize the free route of each wavelength, realizes full light exchange.In recent years, the research of relevant photoswitch report was seen many day by day, and many manufacturers also begin to release or developing all kinds of photoswitches.Usually, photoswitch can be divided into: electrodynamic mechanical type switch, micro electronmechanical array switch, magneto-optic shutter, liquid crystal shutter, thermo-optical switch, electrooptical switching and acoustooptic switch etc.Exchange media according to photoswitch divides, and photoswitch can be divided into: free space exchange photoswitch and waveguide exchange photoswitch.The electrodynamic mechanical type construction of switch is simple, and is with low cost, but switching speed slow (1～10ms level); Micro electronmechanical array switch manufacture craft requires high, and device costs an arm and a leg; There are slow problem (0.1～1ms level) equally in magneto-optic shutter and liquid crystal shutter.In addition, in electrodynamic mechanical type switch and the micro electronmechanical array switch moving-member is arranged all, therefore long-term the use can influence performance and life-span.The introduction of relevant liquid crystal shutter can (U.S.Patent 5 referring to the patent by Bellcore's application, 414,540): Frequency-selective switch employing afrequency dispersive element, the introduction of the relevant magneto-optic shutter of polarization dispersive element andpolarization modulation elements. can (U.S.Patent 5 referring to the patent by Lucent's application, 933,269): Common-lensreflective magneto-optical switch.

(3) utility model content:

At the weak point of above photoswitch, the utility model is good will provide that a kind of exchange velocity is fast, volume is little, insert the mems optical switch that loss is few, drive current is little.

This mems optical switch comprises pedestal loam cake, pedestal, input lens optical fiber, the first output lens optical fiber and the second output lens optical fiber, and the pedestal upper surface is a workbench, is provided with sagging cavity in the middle of the pedestal; Input lens optical fiber with output port towards cavity and output port end the form on the cavity of being suspended on be positioned on the workbench, an end of cavity; The first output lens optical fiber and the second output lens optical fiber with input port be positioned on the workbench towards the form of cavity, the other end of cavity; The cavity place is provided with driver; Driver comprises permanent-magnetic clamp and the coil that is arranged in the permanent-magnetic clamp center pit, and the range of movement of coil and input lens optical fiber intersect, and the input end of coil is connected with micromotor with output terminal.

Because the utility model is to utilize electric signal to come the rotation of control coil in magnetic field, utilizes rotating coil to stir input lens optical fiber, thereby realize the light path switching, therefore simple in structure, with low cost, dependable performance, and be easy to realize.When particularly adopting lens fiber, because thereby this novel photoswitch employing is directly to be coupled between the lens fiber to have shortened light path greatly, owing to there is not other optical element in the middle of the light path, so just improved this device performance greatly, reduced the nonlinear effect in the optical device greatly, therefore this novel photoswitch can be accomplished exchange velocity＜0.5ms level, inserts loss＜0.3dB, crosstalk＞65dB, realized that exchange velocity is fast, the insertion loss is few, drive current is little, volume is little, light path is short, helps targets such as integrated.

Driver of the present utility model can be arranged at and anyly can allow coil toggle it to input lens optical fiber to realize that light path is switched and get final product, but preferably permanent-magnetic clamp is arranged in the cavity, the pedestal of permanent-magnetic clamp central hole is provided with through hole, coil is a square coil, square coil is downward with input and output side, the form that closing end makes progress is arranged in the through hole, and the upper surface of closing end is higher than the lower surface of input lens optical fiber, and closing end is preferably parallel with input lens optical fiber in this scheme, can shorten the coil movement distance like this, improve the sensitivity of photoswitch.

Also have a coil holder of being made by insulating material, coil stationary is on coil holder.

Described coil is the gold thread circle.

Offer on the workbench and be used to hold and to input lens optical fiber, the first output lens optical fiber and the spacing V-shaped groove of the second output lens optical fiber, input lens optical fiber, the first output lens optical fiber and the second output lens optical fiber are arranged in the V-shaped groove.

This practical end face of input lens optical fiber, the first output lens optical fiber and the second output lens optical fiber all can processing is 8 degree inclinations, can also input lens optical fiber, the first output lens optical fiber and the second output lens optical fiber the inclined-plane on plate anti-reflection film, can increase the return loss of light path so well, increase the coupling efficiency of light path.

(4) description of drawings:

Fig. 1 is the cut-open view of a kind of embodiment of the utility model;

Fig. 2 is the structural representation after embodiment shown in Figure 1 removes the support loam cake;

Fig. 3 separate connection (state 1) view;

Fig. 4 light path exchange (state 2) view.

(5) embodiment:

In Fig. 1, embodiment shown in Figure 2, this mems optical switch comprises pedestal loam cake 4, pedestal 5 and input lens optical fiber 1, the first output lens optical fiber 2, the second output lens optical fiber 3, pedestal 5 upper surfaces are workbench 5-1, are provided with sagging cavity 5-2 in the middle of the pedestal 5; Offer the V-shaped groove that is used to hold input lens optical fiber 1, the first output lens optical fiber 2 and the second output lens optical fiber 3 on the workbench 5-1, input lens optical fiber 1 with output port a towards cavity 5-2 and output port a end the form on the cavity 5-2 of being suspended on be positioned over that workbench 5-1 goes up, in the V-shaped groove, the end of cavity 5-2; The first output lens optical fiber 2 and the second output lens optical fiber 3 with input port b, c towards the form of cavity 5-2 be positioned over that workbench 5-1 goes up, in the V-shaped groove, the other end of cavity 5-2; Cavity 5-2 place is provided with driver; Driver comprises permanent-magnetic clamp 6 and the coil 8 that is arranged in permanent-magnetic clamp 6 center pits, and described coil 8 is the gold thread circle; Permanent-magnetic clamp 6 is arranged in the cavity 5-2, and the pedestal 5 of permanent-magnetic clamp 6 central hole is provided with through hole, and permanent-magnetic clamp 6 center pits are provided with the coil holder of being made by insulating material 7, in the groove that coil 8 is offered on being fixed on the coil holder 7.Coil 8 is a square coil, and square coil is downward with input and output side, and the form that closing end makes progress is arranged in the through hole, and the upper surface of closing end is higher than the lower surface of input lens optical fiber 1, closing end parallel with input lens optical fiber 1.The end face of input lens optical fiber 1, the first output lens optical fiber 2 and the second output lens optical fiber 3 all is 8 degree and tilts, and is coated with anti-reflection film on the inclined-plane.

Mems optical switch described in the utility model has two kinds of duties, i.e. separate connection (state 1) and light path exchange (state 2).In state 1, as shown in Figure 3, the input lens optical fiber (1) and the first output lens optical fiber (2) are a-b, and in state 2, as shown in Figure 3, the port of the input lens optical fiber (1) and the second output lens optical fiber (3) is connected situation and is: a-c.

At first state 1 is discussed, and the track of following the tracks of a certain road light is analyzed.From the light signal of the port a of input lens optical fiber 1 input, the centre not through any optical element but directly with the 2 coupling outputs of the first output lens optical fiber, and input lens optical fiber 1 and the first output lens optical fiber 2 are all on same plane.

In state 2, be applied to the electric signal on the driver gold thread circle 8, make the coil holder 7 of driver produce action with gold thread circle 8, promoting input lens optical fiber 1 makes input lens optical fiber 1 be displaced downwardly to the second output lens optical fiber 3, directly, make this light beam be coupled to the second road optical output port again with 3 couplings of the second output lens optical fiber.And input lens optical fiber 1, the second output lens optical fiber 3 are all on same plane.

Above embodiment is only for the usefulness that the utility model is described, but not to restriction of the present utility model, person skilled in the relevant technique, under the situation that does not break away from spirit and scope of the present utility model, can also make various conversion or variation, therefore all technical schemes that are equal to also should belong in the category of the present utility model, are limited by each claim.

Claims

1, mems optical switch comprises pedestal, input lens optical fiber, the first output lens optical fiber and the second output lens optical fiber, it is characterized in that: pedestal (5) upper surface is workbench (5-1), is provided with sagging cavity (5-2) in the middle of the pedestal (5); Input lens optical fiber (1) is positioned over towards cavity (5-2) and output port (a) end the form on the cavity (5-2) of being suspended on output port (a) that workbench (5-1) is gone up, an end of cavity (5-2); The first output lens optical fiber (2) and the second output lens optical fiber (3) are positioned over towards the form of cavity (5-2) with input port (b, c) that workbench (5-1) is gone up, the other end of cavity (5-2); Cavity (5-2) locates to be provided with driver; Driver comprises permanent-magnetic clamp (6) and is arranged at coil (8) in permanent-magnetic clamp (6) center pit, and the range of movement of coil (8) and input lens optical fiber (1) intersect, and the input end of coil (8) is connected with micromotor with output terminal.

2, mems optical switch according to claim 1, it is characterized in that: permanent-magnetic clamp (6) is arranged in the cavity (5-2), the pedestal (5) of permanent-magnetic clamp (6) central hole is provided with through hole, coil (8) is a square coil, square coil is downward with input and output side, the form that closing end makes progress is arranged in the through hole, and the upper surface of closing end is higher than the lower surface of input lens optical fiber (1).

3, mems optical switch according to claim 2 is characterized in that: the square coil closing end is parallel with input lens optical fiber (1).

4, mems optical switch according to claim 2, it is characterized in that: offer the V-shaped groove that is used to hold input lens optical fiber (1), the first output lens optical fiber (2) and the second output lens optical fiber (3) on the workbench (5-1), input lens optical fiber (1), the first output lens optical fiber (2) and the second output lens optical fiber (3) are arranged in the V-shaped groove.

5, mems optical switch according to claim 2 is characterized in that: the end face of input lens optical fiber (1), the first output lens optical fiber (2) and the second output lens optical fiber (3) all is 8 degree and tilts.

6, mems optical switch according to claim 5 is characterized in that: be coated with anti-reflection film on the inclined-plane of input lens optical fiber (1), the first output lens optical fiber (2) and the second output lens optical fiber (3).

7, mems optical switch according to claim 2 is characterized in that: also have a coil holder of being made by insulating material (7), coil (8) is fixed on the coil holder (7).

8, mems optical switch according to claim 7 is characterized in that: described coil (8) is the gold thread circle, and the gold thread circle is arranged in the groove of being offered on the coil holder (7).