Hui J Su

US Patent:

20110134957, Jun 9, 2011

Filed:

Dec 7, 2009

Appl. No.:

12/632625

Inventors:

Hui Su - Arcadia CA, US
Genzao Zhang - Ottawa, CA
Henry A. Blauvelt - San Marino CA, US

Assignee:

Emcore Corporation - Albuquerque NM

International Classification:

H01S 5/026

US Classification:

372 5022

Abstract:

A coherent light source having a semiconductor laser resonator and an optical amplifier which amplifies coherent light emitted by the semiconductor laser resonator in response to current injection, in which the amount of current injected into the semiconductor laser is controlled for conformity with a chirp requirement of an optical communication system. The optical amplifier, which introduces no chirp, may be controlled to match an optical power requirement of the optical communication system. A heater may be provided to introduce a low frequency chirp in order to suppress interferometric intensity noise and unwanted second-order effects such as stimulated Brillouin Scattering. The optical amplifier may be monolithically formed with the semiconductor laser resonator, with separate electrodes provided for injecting current into the semiconductor laser resonator and the optical amplifier.

US Patent:

20120163405, Jun 28, 2012

Filed:

Feb 29, 2012

Appl. No.:

13/407925

Inventors:

Hui Su - Arcadia CA, US
Genzao Zhang - Ottawa, CA
Henry A. Blauvelt - San Marino CA, US

Assignee:

Emcore Corporation - Albuquerque NM

International Classification:

H01S 5/024
H01S 5/10

US Classification:

372 34, 372 5022

Abstract:

A coherent light source having a semiconductor laser resonator and an optical amplifier which amplifies coherent light emitted by the semiconductor laser resonator in response to current injection, in which the amount of current injected into the semiconductor laser is controlled for conformity with a chirp requirement of an optical communication system. The optical amplifier, which introduces no chirp, may be controlled to match an optical power requirement of the optical communication system. A heater may be provided to introduce a low frequency chirp in order to suppress interferometric intensity noise and unwanted second-order effects such as stimulated Brillouin Scattering. The optical amplifier may be monolithically formed with the semiconductor laser resonator, with separate electrodes provided for injecting current into the semiconductor laser resonator and the optical amplifier.