Mechanically actuated MXN optical switch matrix

• US 6,424,759 B1
• Filed: 10/12/1999
• Issued: 07/23/2002
• Est. Priority Date: 10/12/1999
• Status: Expired due to Fees

• Current Assignee: Primawave Photonics, Inc.
• Original Assignee: Primawave Photonics, Inc.
• Inventors: Jing, Xingliang
• Primary Examiner(s): Font, Frank G.
• Assistant Examiner(s): Mooney, Michael P.
• Application Number:
  US09/416,441
• Time in Patent Office: 1,015 Days
• Field of Search: 385/16-18, 385/22, 385/24, 385/33-37, 385/23, 385/47, 359/618, 359/627-629
• US Class Current: 385/17
• CPC Class Codes: G02B 6/3514 the reflective optical element moving along a line so as to translate into and out of the beam path, i.e. across the beam path
• CPC Class Codes: G02B 6/3546 NxM switch, i.e. a regular array of switches elements of matrix type constellation
• CPC Class Codes: G02B 6/3548 1xN switch, i.e. one input and a selectable single output of N possible outputs
• CPC Class Codes: G02B 6/3572 Magnetic force magnetic forces controlling reflecting elements in general G02B26/085; magneto-optic devices G02F1/09
• CPC Class Codes: H04Q 11/0005 Switch and router aspects
• CPC Class Codes: H04Q 2011/0026 using free space propagation (e.g. lenses, mirrors)
• CPC Class Codes: H04Q 2011/005 Arbitration and scheduling
• CPC Class Codes: H04Q 2011/0058 Crossbar; Matrix

Abstract

An M×N mechanically actuated optical switch matrix includes a plurality of optical reflectors arranged in an array comprising a plurality of columns and rows, at least some of which are movable between their on and off positions, a plurality of primary optical ports and a plurality of secondary optical ports. More than one optical reflector may be switched on simultaneously to establish optical signal channels between respective primary and secondary optical ports.

Claims

1. An optical switch, comprising:

(a) a plurality of primary optical ports arranged in a row;

(b) a plurality of secondary optical ports arranged in a column;

(c) a perforated support plate having first and second surfaces opposite each other, the perforated support plate having at least one aperture through the first and second surfaces;

(d) a reflector array comprising a plurality of movable optical reflectors arranged in a plurality of columns and rows, each of the movable optical reflectors individually movable with respect to the support plate, each of the movable optical reflectors capable of occupying an on position to intercept incoming light on a respective first optical path from a respective one of the primary optical ports or an off position away from the respective first optical path, each of the movable optical reflectors having a reflection surface angled with respect to the respective first optical path when the movable optical reflector is in the on position to reflect the light onto a respective second optical path leading to a respective one of the secondary optical ports,

wherein each of the movable optical reflectors is switched from the on position to the off position by moving toward the aperture away from the respective first optical path, and

wherein each of the movable optical reflectors is switched from the off position to the on position by moving away from the aperture onto the respective first optical path;

(e) means for switching the movable optical reflectors between their on and off positions;

(f) a plurality of primary lenses arranged in a row, each of the primary lenses positioned adjacent a-respective one of the primary optical ports to collimate the incoming light on the respective first optical path; and

(g) a plurality of secondary lenses arranged in a column, each of the secondary lenses positioned adjacent a respective one of the secondary optical ports to collimate light on the respective second optical path.

2. The optical switch of claim 1, wherein the actuators comprise relay switches.

3. The optical switch of claim 1, wherein the means for switching the movable optical reflectors comprise a plurality of actuators disposed on the second surface of the support plate.

4. The optical switch of claim 3, wherein the means for switching the movable optical reflectors further comprise a plurality of levers connected between the actuators and the movable optical reflectors, each of the levers movably positioned through the aperture to drive a respective one of the movable optical reflectors between its on and off positions.

5. The optical switch of claim 3, wherein at least two of the optical reflectors in different columns and rows are capable of being selected at a time to be switched to their on positions to reflect light from the respective first optical paths onto the respective second optical paths leading to the respective secondary optical ports.

6. The optical switch of claim 1, wherein the movable optical reflectors comprise mirrors.

7. The optical switch of claim 1, wherein the movable optical reflectors comprise prisms.

8. The optical switch of claim 1, wherein the reflection surface of each of the movable optical reflectors is angled at 45°

with respect to the first optical path.

9. The optical switch of claim 1, further comprising:

(h) a plurality of input optical fibers connected to the primary optical ports respective; and

(i) a plurality of output optical fibers connected to the secondary optical ports respectively.

10. The optical switch of claim 1, wherein the reflector array further comprises a fixed optical reflector connected to the first surface of the support plate to reflect light from the respective first optical path onto the respective second optical path when all of the movable optical reflectors are in their off positions.