Method for transparent switching and controlling optical signals using mirror designs

• US 6,529,654 B1
• Filed: 05/02/2001
• Issued: 03/04/2003
• Est. Priority Date: 05/02/2001
• Status: Expired due to Fees

• Current Assignee: Nayna Networks, Inc.
• Original Assignee: Nayna Networks, Inc.
• Inventors: Wolfson, Michael Barrett, Wong, Richard Koonwai, Chen, Jenghung, Yang, Xiao, Sheh, Edgar D.
• Primary Examiner(s): Kim, Robert H.
• Assistant Examiner(s): Barber, Therese
• Application Number:
  US09/847,868
• Time in Patent Office: 671 Days
• Field of Search: 385/16, 385/17, 385/18, 385/27
• US Class Current: 385/16
• CPC Class Codes: G02B 2006/12104 Mirror; Reflectors or the like
• CPC Class Codes: G02B 6/3518 the reflective optical element being an intrinsic part of a MEMS device, i.e. fabricated together with the MEMS device MEMS devices in general B81B; manufacture of MEM devices in general B81C; micromechanical devices controlling the direction of light G02B26/0833
• CPC Class Codes: G02B 6/357 Electrostatic force electrostatic forces controlling reflecting elements in general G02B26/0841
• CPC Class Codes: G02B 6/359 of the position of the moving element itself during switching, i.e. without monitoring the switched beams

Abstract

A method for switching signals using one of a plurality of mirrors in an array structure. The method includes determining an optical path to be formed between an input fiber and an output fiber. The method also includes determining a set of mirrors to be used to form the optical path. The set of mirrors includes at least a first mirror. The first mirror is coupled to a mechanical spring assembly and an actuation assembly. The method captures an analog signal indicative of a spatial position of the first mirror using a position sensing device. The sensing device is coupled to the mirror. The method also converts the signal analog signal into a digital signal. The method processes the digital signal indicative of the spatial position of the mirror using the digital signal processing device to obtain a characteristic of the mirror. The method provides a control signal based upon the characteristic of the mirror. The converts the control signal into an analog control signal. The method uses the analog control signal with the actuation assembly to set a desired position of the first mirror.

Claims

1. A method for switching signals using one of a plurality of mirrors in an array structure, the method comprising:

determining an optical path to be formed between an input fiber and an output fiber;

determining a set of mirrors to be used to form the optical path, the set of mirrors including at least a first mirror, the first mirror being coupled to a mechanical spring assembly, and an actuation assembly;

capturing an analog signal indicative of a spatial position of the first mirror using a position sensing device, the sensing device being coupled to the mirror;

converting the signal analog signal into a digital signal;

processing the digital signal indicative of the spatial position of the mirror using the digital signal processing device to obtain a characteristic of the mirror; and

providing a control signal based upon the characteristic of the mirror;

converting the control signal into an analog control signal; and

using the analog control signal with the actuation assembly to set a desired position of the first mirror.

2. The method of claim 1 wherein the characteristic comprises position information.

3. The method of claim 1 wherein the characteristic comprises position information including angular deflection, angular velocity, or angular velocity.

4. The method of claim 1 wherein the sensing device is selected from an optical device, an electrical device, a magnetic device, an electro-optic device, and a mechanical device.

5. The method of claim 1 wherein the set of mirrors includes the first mirror and a second mirror, the first mirror deflects an optical signal to the second mirror, the second mirror deflects the optical signal to the output fiber.

6. The method of claim 1 wherein the array comprises at least sixteen mirror devices.

7. The method of claim 1 wherein the mirror device has a spatial surface diameter of about 3 millimeters in size and less.

8. The method of claim 1 wherein the mirror is made of a silicon bearing material.

9. The method of claim 1 wherein the high density array is at least 64 devices.

10. The method of claim 1 wherein the mechanical spring is selected from a torsion bar assembly, a cantilever assembly, a hinged assembly, and a spring assembly.

11. The method of claim 1 wherein the determining is provided using a user interface device.

12. The method of claim 1 wherein the determining is provided using a user interface device coupled to a network.

14. The system of claim 1 wherein the characteristic comprises position information.

15. The system of claim 1 wherein the characteristic comprises position information including angular deflection, angular velocity, or angular velocity.

16. The system of claim 1 wherein the sensing device is selected from an optical device, an electrical device, a magnetic device, an electro-optic device, and a mechanical device.

17. The system of claim 1 wherein the set of mirrors includes the first mirror and a second mirror, the first mirror deflects an optical signal to the second mirror.

13. A system for controlling and switching optical signals using selection of optical paths from a first fiber bundle to a second fiber bundle in a transparent manner, the system comprising:

a client device including a graphical user interface for input of switching information by a user, the client device being substantially free from interaction by the user to optimize an optical path;

a network coupled to the client device for receiving the switching information;

a switch control apparatus coupled to the network and a switch device coupled to the switch control apparatus, the switch control device comprising;

a fiber input device;

a set of mirrors from a plurality of mirrors coupled to the fiber input device, the set of mirrors including at least a first mirror that is capable of being moved about a mechanical spring, the first mirror being coupled to the mechanical spring device to form a counter-acting force to the mirror in a first direction;

a sensing device coupled to the first mirror, the sensing device being adapted to capture position information from the first mirror;

an analog to digital converter device coupled to the sensing device, the digital to analog converter device being adapted to convert the position information into a digital signal;

a signal processing device coupled to the analog to digital converter, the digital signal processing device being adapted to process the digital signal to derive a digital control signal based upon a characteristic of the first mirror device;

a digital to analog converter device coupled to the signal processing device, the digital to analog converter device being adapted to convert the digital control signal to an analog control signal; and

an actuation device coupled to the first mirror and coupled to the digital to analog converter, the actuation device receiving a signal derived from the analog control signal to drive the mirror about the mechanical spring using the analog control signal to set a desired position of the first mirror.