Stephen F O'Brien

52553329, Oct 19, 1993

Jul 16, 1992

7/915918

David F. Welch - Palo Alto CA
Donald R. Scifres - San Jose CA
Robert G. Waarts - Palo Alto CA
Amos A. Hardy - Stanford CA
David G. Mehuys - Sunnyvale CA
Stephen O'Brien - Sunnyvale CA

SDL, Inc. - San Jose CA

G02B 636

385 17

An optical crossbar switch matrix for use in switching optical signals from a first set of optical fibers to a second set of optical fibers, in any order, which is characterized by having a matrix of rows and columns of diffraction gratings formed in a semiconductor heterostructure. Each grating is independently biased with either a forward or reverse bias voltage to switch the grating between a reflective state and a transmissive state. The gratings are oriented at an angle relative to the rows and columns so that when the Bragg condition for the light received from an optical film is met, a portion of the light is diffracted from the row in which it is propagating into a column toward another optical fiber. The heterostructure may include optical amplifiers to restore the optical signal to its original power level. Beam expanding, collimating and focussing optics may also be integrated into the heterostructure.

61612006, Dec 12, 2000

Mar 2, 1998

9/035308

Andrew John Rees - Seattle WA
Stephen Caine O'Brien - Redmond WA
Peter D. Krystad - Seattle WA

Applied Microsystems, Inc. - Redmond WA

H02H 305
H03K 19003

714 38

A software analysis system for capturing tags generated by tag statements in instrumented source code. The software analysis system includes a probe that monitors the address and data bus of the target system. When a tag statement is executed in the target system, a tag is written to a predetermined location in the address space of the target system. The tag contains a tag value that is indicative of the location in the source code of the tag statement generating the tag. By monitoring the predetermined address, the probe is able to capture tags as they are written on the data bus of the target system. By properly instrumenting the source code, the software analysis system is able to perform a variety of analysis functions in essentially real time, including code coverage, function and task execution times, memory allocation, call pairs, and program tracing.

57488789, May 5, 1998

Sep 11, 1995

8/526709

Andrew John Rees - Seattle WA
Stephen Caine O'Brien - Redmond WA
Peter D. Krystad - Seattle WA

Applied Microsystems, Inc. - Redmond WA

G06F 1100

39518314

A software analysis system for capturing tags generated by tag statements in instrumented source code. The software analysis system includes a probe that monitors the address and data bus of the target system. When a tag statement is executed in the target system, a tag is written to a predetermined location in the address space of the target system. The tag contains a tag value that is indicative of the location in the source code of the tag statement generating the tag. By monitoring the predetermined address, the probe is able to capture tags as they are written on the data bus of the target system. By properly instrumenting the source code, the software analysis system is able to perform a variety of analysis functions in essentially real time, including code coverage, function and task execution times, memory allocation, call pairs, and program tracing.

53496027, Sep 20, 1994

Mar 15, 1993

8/031684

David G. Mehuys - Menlo Park CA
Stephen O'Brien - Sunnyvale CA
David F. Welch - Menlo Park CA

SDL, Inc. - San Jose CA

H01S 308

372 98

A coherent light source, such as a laser oscillator and a monolithic MOPA device, and a broad area light amplifying device, all characterized by having a leaky waveguide beam expander coupled thereto for expanding a single mode beam into a wide light beam in a coherent manner. The beam expander comprises an elongated antiguide core of a first refractive index and a radiated-wave receiving region of a higher refractive index to receive lightwaves laterally radiated from the antiguide core. This beam expander can be located at an output end of a single mode laser oscillator to receive and expand the beam, at an input end of a broad area optical power amplifier to allow the amplifier to accept a narrow input beam, or between the laser oscillator and power amplifier in a MOPA device. The beam expander elements can also be located partially or entirely within the resonant optical cavity of a laser oscillator.