Jesper A Jayaswal

US Patent:

8057108, Nov 15, 2011

Filed:

Jul 30, 2010

Appl. No.:

12/847117

Inventors:

Achintya K. Bhowmik - San Jose CA, US
Nagesh K. Vodrahalli - Los Altos CA, US
Gennady Farber - Los Altos CA, US
Hai-Feng Liu - Cupertino CA, US
Hamid Eslampour - San Jose CA, US
Ut Tran - San Jose CA, US
William B. Wong - Saratoga CA, US
Ruolin Li - Santa Clata CA, US
Jesper Arentoft Jayaswal - Palo Alto CA, US

Assignee:

Intel Corporation - Santa Clara CA

International Classification:

G02B 6/36

US Classification:

385 89, 385 14, 385 50

Abstract:

Embodiments of an optical detection apparatus are disclosed which may include one or more of a waveguide, a trench formed in the waveguide, a reflective surface, and a photodetector. The waveguide may be formed in a semiconductor substrate to propagate an optical signal received at a first end of the waveguide. The trench may also be formed in the waveguide having a first sidewall and a second sidewall, the first and second sidewalls forming first and second angles with the waveguide's propagation direction. The second sidewall may include a reflective surface formed thereon. The photodetector may be configured to receive an optical signal propagated in the waveguide, through the first sidewall and reflected from the reflective surface on the second sidewall.

US Patent:

20040151227, Aug 5, 2004

Filed:

Feb 3, 2003

Appl. No.:

10/357630

Inventors:

Achintya Bhowmik - San Jose CA, US
Nagesh Vodrahalli - Los Altos CA, US
Gennady Farber - Los Altos CA, US
Hai-Feng Liu - Cupertino CA, US
Hamid Eslampour - San Jose CA, US
Ut Tran - San Jose CA, US
William Wong - Saratoga CA, US
Ruolin Li - Santa Clara CA, US
Jesper Jayaswal - Palo Alto CA, US

International Classification:

H01S003/13
H01S003/082

US Classification:

372/097000

Abstract:

An optical transmitter includes an external cavity laser array formed in a PLC, a trench-based detector array and an AWG. The external cavity laser is formed using an array of substantially similar laser gain blocks and an array of gratings formed in waveguides connected to the gain blocks. Each grating defines the output wavelength for its corresponding external cavity laser. Each detector of the detector array includes a coupler to cause a portion of a corresponding laser output signal of the laser array to propagate through a first sidewall of a trench and reflect off a second sidewall of the trench to a photodetector. In one embodiment, the photodetector outputs a signal indicative of the power level of the reflected signal, which a controller uses to control the laser array to equalize the power of the laser output signals.

US Patent:

20060285106, Dec 21, 2006

Filed:

Aug 1, 2006

Appl. No.:

11/497954

Inventors:

Achintya Bhowmik - San Jose CA, US
Nagesh Vodrahalli - Los Altos CA, US
Gennady Farber - Los Altos CA, US
Hai-Feng Liu - Cupertino CA, US
Hamid Eslampour - San Jose CA, US
Ut Tran - San Jose CA, US
William Wong - Saratoga CA, US
Ruolin Li - Santa Clara CA, US
Jesper Jayaswal - Palo Alto CA, US

International Classification:

G01N 21/00

US Classification:

356073100

Abstract:

Embodiments of an optical detection apparatus are disclosed which may include one or more of a waveguide, a trench formed in the waveguide, a reflective surface, and a photodetector. The waveguide may be formed in a semiconductor substrate to propagate an optical signal received at a first end of the waveguide. The trench may also be formed in the waveguide having a first sidewall and a second sidewall, the first and second sidewalls forming first and second angles with the waveguide's propagation direction. The second sidewall may include a reflective surface formed thereon. The photodetector may be configured to receive an optical signal propagated in the waveguide, through the first sidewall and reflected from the reflective surface on the second sidewall.

US Patent:

20080279236, Nov 13, 2008

Filed:

Jul 21, 2008

Appl. No.:

12/176758

Inventors:

Achintya K. Bhowmik - San Jose CA, US
Nagesh K. Vodrahalli - Los Altos CA, US
Gennady Farber - Los Altos CA, US
Hai-Feng Liu - Cupertino CA, US
Hamid Eslampour - San Jose CA, US
Ut Tran - San Jose CA, US
William B. Wong - Saratoga CA, US
Ruolin Li - Santa Clara CA, US
Jesper Arentoft Jayaswal - Palo Alto CA, US

International Classification:

H01S 3/13

US Classification:

372 29021

Abstract:

Embodiments of an optical detection apparatus are disclosed which may include one or more of a waveguide, a trench formed in the waveguide, a reflective surface, and a photodetector. The waveguide may be formed in a semiconductor substrate to propagate an optical signal received at a first end of the waveguide. The trench may also be formed in the waveguide having a first sidewall and a second sidewall, the first and second sidewalls forming first and second angles with the waveguide's propagation direction. The second sidewall may include a reflective surface formed thereon. The photodetector may be configured to receive an optical signal propagated in the waveguide, through the first sidewall and reflected from the reflective surface on the second sidewall.