Ming G Wu

US Patent:

6449301, Sep 10, 2002

Filed:

Jun 22, 1999

Appl. No.:

09/338458

Inventors:

Ming C. Wu - Pacific Palisades CA
Ji-Lin Shen - Chung-Li, TW

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

H01S 310

US Classification:

372 92, 372 18, 372 25, 372 50, 372 99, 372102

Abstract:

External cavity semiconductor lasers using a saturable Bragg reflector as an external reflector are mode locked and produce output pulses of 1. 9 ps from a semiconductor lasers without dispersion compensation. By coupling the output to a standard single mode fiber with a length of 35 m to compensate the linear chirp, the mode-locked pulse duration as short as 880 fs is achieved.

US Patent:

6498870, Dec 24, 2002

Filed:

Apr 20, 1998

Appl. No.:

09/063644

Inventors:

Ming Wu - Pacific Palisades CA
Li Fan - San Diego CA
Anis Husain - San Diego CA

Assignee:

OMM, Inc. - San Diego CA

International Classification:

G02B 626

US Classification:

385 18, 385 16, 385 25

Abstract:

A micromachined plate called a torsion plate, selectively pivots upon a substrate responsively to electrical force so as to move an attached micromirror in a same plane; thereby to accurately selectively intercept, and to reflect, a light beam that is moving parallel to the substrate; forming thus an optomechanical switch The electrical force may be electromagnetic in nature or, preferably, electrostatic. In various embodiments the pivoting torsion plate with the micromirror affixed may be (i) biased off the substrate by a three-dimensional structure and/or by a âreshapedâ torsion beam (ii) bent as plate and operated push OR pull, push AND pull, or push AND push, in a rocking operation, (iii) elevated above the substrate upon a self-assembling âmicro-elevator structureâ and/or (iv) moved greatly in angular position by action of a âmicro-flapâ A new design spring-loaded landing electrode and a torsion microhinge - further enhance performance. The micromachined, or Micro Electro Mechanical Systems (MEMS), optomechanical switch so formed is both fast and accurate to switch light over large angles up to 180Â while being highly resistant to sticking, or âstictionâ.

US Patent:

6526198, Feb 25, 2003

Filed:

Jan 17, 2002

Appl. No.:

10/053399

Inventors:

Ming C. Wu - Pacific Palisades CA
Li Fan - Rowland Heights CA
Anis Husain - San Diego CA

Assignee:

OMM, Inc. - San Diego CA

International Classification:

G02B 626

US Classification:

385 18, 385 16, 385 25

Abstract:

In at least one embodiment, a MEMS optomechanical switch in accordance with the present invention includes a substrate, a signal source capable of transmitting a radiation signal, an electrode coupled to the substrate, and a micromachined plate rotatably coupled to the substrate about a pivot axis. The switch further includes a micromirror having an orientated reflective surface, mounted to the micromachined plate and an electrical source coupled to at least one of the electrode and the micromachined plate.

US Patent:

6958132, Oct 25, 2005

Filed:

May 31, 2002

Appl. No.:

10/161220

Inventors:

Pei Yu Chiou - Los Angeles CA, US
Ming C. Wu - Pacific Palisades CA, US

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

B01L003/02
G01N001/10
G01N021/00
G01N021/29
C02F001/40

US Classification:

422100, 422 55, 422 81, 422 8205, 436180, 436164, 204600

Abstract:

The invention is related to methods and apparatus that manipulate droplets in a microfluidic environment. Advantageously, embodiments of the invention manipulate droplets by controlling the electro-wetting characteristics of a surface with light, thereby inducing a gradient in the surface tension of a droplet. The gradient in the surface tension propels the droplet by capillary force. A variety of operations, such as transporting, joining, cutting, and creating can be performed. Advantageously, embodiments of the invention obviate the need to create a relatively large and complex control electrode array. A plurality of photoconductive cells or a layer of a photoconductive material selectively couples an electrode carrying an electrical bias to otherwise floating conductive cells in response to a beam of light. The electrical bias applied to the conductive cell generates a localized electric field, which can change the contact angle of the droplet, thereby permitting the droplet to be propelled.

US Patent:

7003231, Feb 21, 2006

Filed:

Apr 19, 2001

Appl. No.:

09/839693

Inventors:

Winston Way - Irvine CA, US
Ming Chia Wu - Irvine CA, US
Ming-Bing Chen - Irvine CA, US

Assignee:

OpVista, Inc. - Irvine CA

International Classification:

H04B 10/04

US Classification:

398186, 398183

Abstract:

An optical carrier notch filter includes an optical coupler with at least first, second and third ports. The first port is configured to receive an output that includes an optical carrier and interleaved optical single sideband signals. An optical bandpass filter is coupled to a port of the optical coupler. The optical bandpass filter separates the output into a transmitted signal that contains the optical carrier, and a reflected signal that includes the interleaved optical single sideband signals. The reflected signal is reflected from the optical bandpass filter to the third port of the optical coupler.

US Patent:

7053737, May 30, 2006

Filed:

Sep 19, 2002

Appl. No.:

10/251677

Inventors:

Robert N. Schwartz - Costa Mesa CA, US
Ming Wu - Los Angeles CA, US
Tsung-Yuan Hsu - Westlake Village CA, US
Adele E. Schmitz - Newbury Park CA, US
Robert Y. Loo - Agoura Hills CA, US
James H. Schaffner - Chatsworth CA, US
Gregory L. Tangonan - Oxnard CA, US

Assignee:

HRL Laboratories, LLC - Malibu CA
The Regents of the University of California - Oakland CA

International Classification:

H01H 51/22

US Classification:

335 78, 200181

Abstract:

A micro-electromechanical system (MEMS) switch formed on a substrate, the switch comprising a transmission line formed on the substrate, a substrate electrostatic plate formed on the substrate, and an actuating portion. The actuating portion comprises a cantilever anchor formed on the substrate and a cantilevered actuator arm extending from the cantilever anchor. Attraction of the actuator arm toward the substrate brings an electrical contact into engagement with the portions of the transmission line separated by a gap, thus bridging the transmission line gap and closing the circuit. In order to maximize electrical isolation between the transmission line and the electrical contact in an OFF-state while maintaining a low actuation voltage, the actuator arm is bent such that the minimum separation distance between the transmission line and the electrical contact is equal to or greater than the maximum separation distance between the substrate electrostatic plate and arm electrostatic plate.

US Patent:

7085122, Aug 1, 2006

Filed:

May 21, 2004

Appl. No.:

10/850958

Inventors:

Ming C. Wu - Pacific Palisades CA, US
Hung D. Nguyen - Los Angeles CA, US
Doo-Young Hah - Daejeon, KR
Pamela R. Patterson - Los Angeles CA, US

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

H01G 7/00

US Classification:

361277, 361272, 361278, 361287, 361290, 361292, 333134, 333135, 333174

Abstract:

A MEMS tunable capacitor with angular vertical comb-drive (AVC) actuators is described where high capacitances and a wide continuous tuning range is achieved in a compact space. The comb fingers rotate through a small vertical angle which allows a wider tuning range than in conventional lateral comb drive devices. Fabrication of the device is straightforward, and involves a single deep reactive ion etching step followed by release and out-of-plane assembly of the angular combs.

US Patent:

7206520, Apr 17, 2007

Filed:

Feb 21, 2006

Appl. No.:

11/358990

Inventors:

Winston Way - Irvine CA, US
Ming Chia Wu - Irvine CA, US
Ming-Bing Chen - Irvine CA, US

Assignee:

OpVista Incorporated - Milpitas CA

International Classification:

H04B 10/04

US Classification:

398186, 398183

Abstract:

An optical carrier notch filter includes an optical coupler with at least first, second and third ports. The first port is configured to receive an output that includes an optical carrier and interleaved optical single sideband signals. An optical bandpass filter is coupled to a port of the optical coupler. The optical bandpass filter separates the output into a transmitted signal that contains the optical carrier, and a reflected signal that includes the interleaved optical single sideband signals. The reflected signal is reflected from the optical bandpass filter to the third port of the optical coupler.