Paul Matthew Lundquist

US Patent:

RE39001, Mar 7, 2006

Filed:

Dec 26, 2002

Appl. No.:

10/330975

Inventors:

Paul Matthew Lundquist - San Jose CA, US
Eugenia Tam - Saratoga CA, US
Yunlong Sun - Beaverton OR, US

Assignee:

Electro Scientific Industries, Inc. - Portland OR
Hitachi Global Storage Technologies, Netherlands B.V. - Amsterdam

International Classification:

B23K 26/38

US Classification:

21912172, 21912169

Abstract:

A method for cutting a ceramic wafer to form individual sliders for use in supporting the read/write heads in magnetic recording disk drives uses multiple parallel scans of a pulsed laser to ablate the ceramic material. After the wafer has been cut into individual rows, a pulsed laser beam is directed to that surface of the row that will become the disk sides of the sliders (i. e. , the sides of the sliders that will face the disks in the disk drive). The laser is pulsed as the laser spot is moved along a first scan line across the surface of the wafer row to form a generally V-shaped trench. The laser spot is then moved in a direction generally perpendicular to the first scan line a distance less than the laser beam diameter, and then pulsed while the laser spot is scanned along a second line generally parallel to the first scan line. This slight offset of the laser beam during the second scan blends the edges of the wafer surface at the trench to remove protrusions formed at those edges by the first laser scan. The laser is then moved to the other side of the first scan line a distance less than the laser beam diameter and a third scan is made to blend the other edge.

US Patent:

7218858, May 15, 2007

Filed:

May 20, 2002

Appl. No.:

10/153230

Inventors:

Paul M. Lundquist - San Jose CA, US
Richard J. Frost - Cary NC, US
Marc Levesque - San Jose CA, US

Assignee:

Ciena Corporation - Linthicum MD

International Classification:

H04J 14/02
H04B 10/00
G02B 6/00

US Classification:

398 94, 398158, 385140

Abstract:

Described herein are one or more embodiments of a system and method for managing power in an optical network using a variable optical attenuator (VOA). In one embodiment, the attenuation of the VOA is controlled in a feedback loop in accordance with a plural zone method. In one example, the VOA is a mechanical VOA. In another example, the VOA is a latching VOA.

US Patent:

7424223, Sep 9, 2008

Filed:

Jul 22, 2004

Appl. No.:

10/896284

Inventors:

Paul Lundquist - San Jose CA, US
Denis Zaccarin - San Jose CA, US

Assignee:

Ciena Corporation - Linthicum MD

International Classification:

H04J 14/00
G02B 6/28

US Classification:

398 49, 385 24

Abstract:

An optical selector device is disclosed that includes a first arrayed waveguide grating (AWG) demultiplexing an input WDM signal and outputting demultiplexed signals on respective outputs; an array of optical shutters optically coupled to the outputs from the first AWG; a second AWG optically coupled to the array of optical shutters, the second AWG multiplexing optical signals output from the array to form a WDM signal; and a common optical shutter optically coupled to either of the first and second AWGs. The common optical shutter has a default state that is substantially opaque to the WDM signal. Additionally, the array of optical shutters may have a default state that is substantially transparent to the demultiplexed signals. A reconfigurable wavelength blocking device incorporating the optical selector device is also disclosed which additionally includes a controller that controls the optical shutter array to selectively block/pass designated wavelength channels or bands.

US Patent:

7483205, Jan 27, 2009

Filed:

May 28, 2004

Appl. No.:

10/855385

Inventors:

Paul Lundquist - San Jose CA, US
Marc Levesque - San Jose CA, US
Denis Zaccarin - San Jose CA, US

Assignee:

Ciena Corporation - Linthicum MD

International Classification:

H04B 10/17
G02B 6/26

US Classification:

3593413

Abstract:

An apparatus for suppressing optical power transients includes a variable optical attenuator receiving an input optical signal and outputting an output optical signal; an optical power sensing element coupled to the input optical signal and sensing a portion of the input optical signal; and a feedforward loop controller coupled to the variable optical attenuator and to the optical power sensing element; the feedforward control loop providing feedforward control of the variable optical attenuator to reduce optical power transients of the input optical signal and maintain a substantially constant output power based on the input optical power and a reference value; the variable optical attenuator having a default opaque state in which the input optical signal is substantially attenuated when power is not being supplied to said variable optical attenuator. Variations include feedback loop controllers and a combination feedback and feedforward loop controllers.

US Patent:

7589889, Sep 15, 2009

Filed:

Jul 16, 2008

Appl. No.:

12/174351

Inventors:

Paul Lundquist - San Jose CA, US
Marc Levesque - San Jose CA, US
Denis Zaccarin - San Jose CA, US

Assignee:

Ciena Corporation - Linthicum MD

International Classification:

H04B 10/17
G02B 6/26

US Classification:

3593413

Abstract:

An apparatus for suppressing optical power transients includes a variable optical attenuator receiving an input optical signal and outputting an output optical signal; an optical power sensing element coupled to the input optical signal and sensing a portion of the input optical signal; and a feedforward loop controller coupled to the variable optical attenuator and to the optical power sensing element; the feedforward control loop providing feedforward control of the variable optical attenuator to reduce optical power transients of the input optical signal and maintain a substantially constant output power based on the input optical power and a reference value; the variable optical attenuator having a default opaque state in which the input optical signal is substantially attenuated when power is not being supplied to said variable optical attenuator. Variations include feedback loop controllers and a combination feedback and feedforward loop controllers.

US Patent:

7626704, Dec 1, 2009

Filed:

Oct 26, 2007

Appl. No.:

11/978138

Inventors:

Paul Lundquist - San Jose CA, US
Denis Zaccarin - San Jose CA, US
Yves Lacroix - San Jose CA, US
Mark Maxham - Redwood City CA, US
Mathieu Foquet - Redwood City CA, US
Stephen Turner - Menlo Park CA, US

Assignee:

Pacific Biosciences of California, Inc. - Menlo Park CA

International Classification:

G01N 21/25

US Classification:

356417

Abstract:

Methods and systems for real-time monitoring of optical signals from arrays of signal sources, and particularly optical signal sources that have spectrally different signal components. Systems include signal source arrays in optical communication with optical trains that direct excitation radiation to and emitted signals from such arrays and image the signals onto detector arrays, from which such signals may be subjected to additional processing.

US Patent:

7630073, Dec 8, 2009

Filed:

Oct 26, 2007

Appl. No.:

11/978168

Inventors:

Paul Lundquist - San Jose CA, US
Denis Zaccarin - San Jose CA, US
Yves Lacroix - San Jose CA, US
Stephen Turner - Menlo Park CA, US
John Dixon - Moss Beach CA, US

Assignee:

Pacific Biosciences of California - Menlo Park CA

International Classification:

G01J 3/30

US Classification:

356317

Abstract:

Methods and systems for real-time monitoring of optical signals from arrays of signal sources, and particularly optical signal sources that have spectrally different signal components. Systems include signal source arrays in optical communication with optical trains that direct excitation radiation to and emitted signals from such arrays and image the signals onto detector arrays, from which such signals may be subjected to additional processing.

US Patent:

7692783, Apr 6, 2010

Filed:

Jul 7, 2006

Appl. No.:

11/483413

Inventors:

Paul Lundquist - San Jose CA, US
Denis Zaccarin - San Jose CA, US
Yves Lacroix - San Jose CA, US
Stephen Turner - Menlo Park CA, US
John Dixon - Moss Beach CA, US

Assignee:

Pacific Biosciences of California - Menlo Park CA

International Classification:

G01N 21/01

US Classification:

356244

Abstract:

Methods and systems for real-time monitoring of optical signals from arrays of signal sources, and particularly optical signal sources that have spectrally different signal components. Systems include signal source arrays in optical communication with optical trains that direct excitation radiation to and emitted signals from such arrays and image the signals onto detector arrays, from which such signals may be subjected to additional processing.