Corning Incorporated

Konica Minolta Opto, Inc.

David A Loeber

Jacques Gollier

Yuichi Atarashi

Chung-En Zah

Nobuyoshi Mori

Vikram Bhatia

Daniel Ohen Ricketts

Martin Hai Hu

Fumio Nagai

Katsuya Yagi

E Alan Dowdell

The present invention provides a semiconductor light source module including: a semiconductor light source for emitting a light flux with a predefined wavelength; a SHG element for converting an incident light flux entering onto an incident end surface of the SHG element into an outgoing light flux having a different wavelength from the incident light flux; a light converging optical system for converging a light flux emitted from the semiconductor light source onto the incident end surface of the SHG element; a light receiving element for receiving a part of a light flux emitted from the SHG element; and a drive device for driving an optical element in the light converging optical system based on a light flux received by the light receiving element.

Semiconductor light source module

The present invention relates generally to semiconductor lasers and laser scanning systems and, more particularly, to schemes for controlling wavelength in semiconductor lasers. According to one embodiment of the present invention, a method of minimizing laser wavelength variations in a semiconductor laser is provided. According to the method, one or more of the laser drive currents is configured to comprise a drive portion and a wavelength recovery portion. The wavelength recovery portion of the drive current comprises a recovery amplitude Ithat is distinct from the drive amplitude Iand a recovery duration tthat is less than the drive duration t. The recovery amplitude Iand duration tare sufficient to recover carrier density distribution distorted by gain compression effects prior to recovery. Additional embodiments are disclosed and claimed.

Wavelength control in semiconductor lasers

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Horseheads, NY, United States of America

David A Loeber