CN218728160U

CN218728160U - Low-loss MEMS optical switch

Info

Publication number: CN218728160U
Application number: CN202223000496.1U
Authority: CN
Inventors: 李阳; 陈立勋; 徐云兵; 邓伟松; 薛听雨
Original assignee: Fuzhou Photop Qptics Co ltd
Current assignee: Fuzhou Photop Qptics Co ltd
Priority date: 2022-11-10
Filing date: 2022-11-10
Publication date: 2023-03-24
Anticipated expiration: 2032-11-10

Abstract

The utility model discloses a low-loss MEMS optical switch, which comprises a shell, a two-dimensional optical fiber array, a graded index lens and an MEMS micro-mirror, wherein the two-dimensional optical fiber array, the graded index lens and the MEMS micro-mirror are sequentially arranged and packaged in the shell; the two-dimensional optical fiber array comprises an optical fiber input port and a plurality of optical fiber output ports; the utility model discloses a combination lens that contains the gradual change refractive index lens replaces current single collimating lens, when greatly optimizing the optical system aberration, has promoted fiber array's lateral expansion size, realizes the low small-size high performance MEMS photoswitch that decreases high port number of inserting.

Description

Low-loss MEMS optical switch

Technical Field

The utility model relates to an optical communication device field, concretely relates to low-loss MEMS photoswitch.

Background

Compared with optical switches of other technical platforms, the MEMS optical switch has become the mainstream of the optical switch product series due to its significant advantages of low loss, small size, and fast switching speed. The existing MEMS-based optical switch generally adopts the technical scheme of combining a two-dimensional optical fiber array (containing a corrosion optical fiber array), a single collimation C lens and an MEMS reflector. The two-dimensional optical fiber array is used as an input end and an output end of an optical signal, the single collimation C lens is used as a coupling conversion element of a light beam, the MEMS reflector is used as a control element for switching the optical signal, and the optical signal can be freely switched among output ports of the two-dimensional optical fiber array through two-dimensional rotation of the MEMS reflector.

The single collimation C lens has large off-axis aberrations. As the off-axis distance increases, the coupling effect of the optical signal also deteriorates. The traditional MEMS optical switch is limited by aberration of a single collimating lens, and if the number of input and output optical fibers is increased, only optical fibers with smaller outer diameters can be adopted. However, when the outer diameter of the optical fiber is reduced to a certain level, the optical fiber is easily broken, thereby affecting the reliability of the device. The above factors limit the number of ports of conventional MEMS optical switches.

The conventional MEMS optical switch usually adopts a pair of C lens sets to solve the problem of large channel insertion loss difference caused by large off-axis aberration. However, the increase in the number of lenses drives up the material and production costs of the product. In addition, for broadband applications, the large wavelength dependent loss and channel insertion loss difference of the conventional design are two major problems to be solved.

Disclosure of Invention

In view of this, the utility model provides a compact structure, extend the convenient low-loss MEMS photoswitch of debugging to solve the great insertion loss of traditional design, the problem of passageway insertion loss difference and wavelength dependent loss.

For this purpose, the utility model provides a low-loss MEMS optical switch, which comprises a shell, a two-dimensional fiber array, a graded index lens and an MEMS micro-mirror, wherein the two-dimensional fiber array, the graded index lens and the MEMS micro-mirror are sequentially arranged and packaged in the shell; the two-dimensional optical fiber array comprises an optical fiber input port and a plurality of optical fiber output ports, one side of the two-dimensional optical fiber array corresponding to the graded index lens is an inclined plane, and the inclined plane corresponding to the graded index lens is arranged on the inclined plane corresponding to the two-dimensional optical fiber array; optical signals are input from an optical fiber input port of the two-dimensional optical fiber array, pass through the graded index lens, are reflected by the MEMS micro-mirror, pass through the graded index lens again, and are coupled into an optical fiber output port for output.

A low-loss MEMS optical switch comprises a shell, a two-dimensional optical fiber array, a glass rod, a graded index lens and an MEMS micro-mirror, wherein the two-dimensional optical fiber array, the glass rod, the graded index lens and the MEMS micro-mirror are sequentially arranged and packaged in the shell; the two-dimensional optical fiber array comprises an optical fiber input port and a plurality of optical fiber output ports, one side of the two-dimensional optical fiber array corresponding to the glass rod is an inclined plane, and the inclined plane of the glass rod corresponding to the two-dimensional optical fiber array is provided with an inclined plane corresponding to the inclined plane; optical signals are input from an optical fiber input port of the two-dimensional optical fiber array, sequentially pass through the glass rod and the graded index lens, are reflected by the MEMS micro-mirror, sequentially pass through the graded index lens and the glass rod, and are coupled into an optical fiber output port for output.

Further, the optical fiber heads of the two-dimensional optical fiber array are distributed in a square or circular shape.

Further, the MEMS micro-mirror includes a micro-mirror and a micro-electromechanical system for adjusting rotation of the micro-mirror in a horizontal plane and a vertical plane.

Adopt foretell technical scheme, compared with the prior art, the utility model, its beneficial effect who has is: according to the scheme, the C lens is replaced by the glass rod with the inclined plane and the graded index lens or the independent graded index lens, so that the optical system aberration is greatly optimized, the transverse expansion size of the optical fiber array is increased, the low insertion loss high port number is realized, the insertion loss angular sensitivity of a product and the insertion loss difference of different channels are remarkably reduced, and therefore the low-loss MEMS optical switch of a higher channel can be realized.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;

fig. 2 is a schematic structural diagram of embodiment 2 of the present invention;

fig. 3 is a schematic diagram of the end face structure of the middle two-dimensional optical fiber array of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

As shown in fig. 1, embodiment 1 of the present invention includes a housing 10, and a two-dimensional optical fiber array 12, a glass rod 14, a graded index lens 15, and a MEMS micromirror 13 sequentially arranged and packaged inside the housing; the two-dimensional optical fiber array comprises an optical fiber input port and a plurality of optical fiber output ports 11, one side of each optical fiber output port corresponding to the glass rod 14 is an inclined plane, and the inclined plane of the glass rod 14 corresponding to the two-dimensional optical fiber array is provided with an inclined plane corresponding to the inclined plane; an optical signal is input from an optical fiber input port of the two-dimensional optical fiber array 12, sequentially passes through the glass rod 14 and the graded index lens 15, is reflected by the MEMS micro-mirror 13, sequentially passes through the graded index lens 15 and the glass rod 14, and is coupled into an optical fiber output port for output.

Example 2

As shown in fig. 2, embodiment 2 of the present invention includes a housing 20, and a two-dimensional fiber array 22, a graded index lens 24, and a MEMS micromirror 23 sequentially arranged and packaged inside the housing; the two-dimensional optical fiber array 22 comprises an optical fiber input port and a plurality of optical fiber output ports, one side of the two-dimensional optical fiber array corresponding to the graded index lens 23 is an inclined plane, and the inclined plane corresponding to the inclined plane of the graded index lens 23 corresponding to the two-dimensional optical fiber array 22 is provided with an inclined plane corresponding to the inclined plane; an optical signal is input from an optical fiber input port of the two-dimensional optical fiber array 22, passes through the graded index lens 24, is reflected by the MEMS micro-mirror 23, passes through the graded index lens 24 again, and is coupled into an optical fiber output port for output.

In a further development of the two embodiments, the fiber heads of the two-dimensional fiber array are arranged in a square shape (see fig. 3) or in a circular shape.

In a further refinement of both embodiments, the MEMS micro-mirror comprises a micromirror and a micro-electromechanical system for adjusting the rotation of the micromirror in a horizontal plane and a vertical plane.

Claims

1. A low-loss MEMS optical switch is characterized by comprising a shell, a two-dimensional optical fiber array, a graded index lens and an MEMS micro-mirror, wherein the two-dimensional optical fiber array, the graded index lens and the MEMS micro-mirror are sequentially arranged and packaged in the shell; the two-dimensional optical fiber array comprises an optical fiber input port and a plurality of optical fiber output ports, one side of the two-dimensional optical fiber array corresponding to the graded index lens is an inclined plane, and the inclined plane corresponding to the graded index lens is arranged on the inclined plane corresponding to the two-dimensional optical fiber array; an optical signal is input from an optical fiber input port of the two-dimensional optical fiber array, passes through the graded index lens, is reflected by the MEMS micro-mirror, passes through the graded index lens again, and is coupled into an optical fiber output port for output.

2. A low-loss MEMS optical switch is characterized by comprising a shell, a two-dimensional optical fiber array, a glass rod, a graded index lens and an MEMS micro-mirror, wherein the two-dimensional optical fiber array, the glass rod, the graded index lens and the MEMS micro-mirror are sequentially arranged and packaged in the shell; the two-dimensional optical fiber array comprises an optical fiber input port and a plurality of optical fiber output ports, one side of the two-dimensional optical fiber array corresponding to the glass rod is an inclined plane, and the inclined plane of the glass rod corresponding to the two-dimensional optical fiber array is provided with an inclined plane corresponding to the inclined plane; optical signals are input from an optical fiber input port of the two-dimensional optical fiber array, sequentially pass through the glass rod and the graded index lens, are reflected by the MEMS micro-mirror, sequentially pass through the graded index lens and the glass rod, and are coupled into an optical fiber output port for output.

3. A low loss MEMS optical switch according to claim 1 or 2, wherein the optical fiber tips of the two-dimensional optical fiber array are distributed in a square or circle.

4. A low loss MEMS optical switch according to claim 1 or 2, wherein the MEMS micro-mirror comprises a micro-mirror and a micro-electromechanical system for adjusting the rotation of the micro-mirror in the horizontal and vertical planes.