Chris L Hart

US Patent:

7322754, Jan 29, 2008

Filed:

Feb 9, 2005

Appl. No.:

11/054453

Inventors:

Robert K. Wolf - Fleetwood PA, US
Hui Fu - Allentown PA, US
Anthony T. Yesenofski - Allentown PA, US
Chris Hart - West Melbourne FL, US
Erji Mao - San Jose CA, US
Heino Bukkems - Santa Clara CA, US
William K. Hogan - Merritt Island FL, US

Assignee:

JDS Uniphase Corporation - Milpitas CA

International Classification:

G02B 6/42

US Classification:

385 93, 385 88, 385 92, 385 94

Abstract:

The invention relates to a compact transmitter optical sub-assembly (OSA), which can be used in small form factor optical transceivers. To limit back reflections from entering the laser cavity, the laser is disposed on a silicon optical bench (SiOB) at an acute angle to the longitudinal axis of the OSA. A portion of the light from the laser cavity passes through the back end of the laser cavity for measuring by a monitor photodiode. A rear beam steering lens redirects the portion of light into a v-groove in the SiOB and off of a reflective surface formed in the end thereof to the monitor photodiode, which is positioned face down over the v-groove.

US Patent:

7476040, Jan 13, 2009

Filed:

Jan 31, 2005

Appl. No.:

11/046939

Inventors:

Jeffrey Zack - Melbourne FL, US
Craig A. Young - Nazareth PA, US
Anand Shukla - Newtown PA, US
Wei Xu - West Windsor NJ, US
William K. Hogan - Merritt Island FL, US
David Peter Gaio - Rochester MN, US
Chris Hart - West Melbourne FL, US
Philip Deane - Indian Harbour Beach FL, US
Mark J. Bailey - Lake City MN, US
Martin A. Helfand - Cherry Hill NJ, US

Assignee:

JDS Uniphase Corporation - Milpitas CA

International Classification:

G02B 6/42

US Classification:

385 93

Abstract:

The present invention relates to an optical sub-assembly, i. e. a receiver optical subassembly or a transmitter optical sub-assembly, for use in an optical transceiver device. The optical sub-assembly according to the present invention includes a hermetic ceramic package with a multi-layer ceramic structure providing a unique RF signal and ground structure providing a controlled signal impedance to achieve high signal transmission quality.

US Patent:

20050018981, Jan 27, 2005

Filed:

Jul 16, 2004

Appl. No.:

10/892843

Inventors:

Robert Modavis - Painted Post NY, US
Timothy Douglas Goodman - Windsor CA, US
Roger Lindquist - Dodge Centre MN, US
Chris Hart - West Melbourne FL, US
William Hogan - Rochester MN, US

Assignee:

JDS Uniphase Corporation - San Jose CA

International Classification:

G02B006/36

US Classification:

385093000, 385092000

Abstract:

The invention relates to a receiver optical sub-assembly (ROSA) for use in an optical transceiver to convert optical signals transmitted along an optical fiber into electrical signals for use by a host device. Conventionally, light exiting the optical fiber inside an optical coupler of the ROSA encounters a refractive index mismatched interface, e.g. fiber/air, causing a portion of the light to be reflected directly back into the fiber. To minimize back reflections at the interface with the optical fiber, an optical insert is provided having an index of refraction matching that of the optical fiber, thereby moving the mismatched interface remote from the end of the fiber to an interface of the optical insert and a lens, to which the optical insert is attached.

US Patent:

20050265416, Dec 1, 2005

Filed:

Sep 29, 2004

Appl. No.:

10/953798

Inventors:

Erik Zucker - Los Altos CA, US
Edmund Wolak - Palo Alto CA, US
Vincent Wong - San Jose CA, US
Chris Hart - West Melbourne FL, US
Jay Skidmore - San Jose CA, US
Randolph Hines - Melbourne FL, US

Assignee:

JDS Uniphase Corporation - San Jose CA

International Classification:

H01S003/13

US Classification:

372050120

Abstract:

A high power light source having an array, bundle or separate plurality of laser diodes coupled to a same number of multimode waveguides to collect beams of light emitted from the of laser diodes is provided. An optical combiner receives the beams of light and combines the beams of light into a single forward propagating beam of light so that substantially all optical radiation within each beam of light overlaps the optical radiation each other beam to form the single beam. A reflective element is located to receive the single forward propagating beam of light and transmits greater than 60% of the single forward propagating beam of light therethrough. The reflective element reflects between 3-40% of the single forward propagating beam back to the laser diodes as feedback to stabilize said laser diodes.