Patent Number: 6,298,075

Title: Optical apparatus and method for producing the same

Abstract: A light generating apparatus includes: a submount; a semiconductor laserchip mounted on the submount; a substrate which is mounted on the submountand includes an optical waveguide; and a substance having a predeterminedthickness which is disposed between the semiconductor laser chip and thesubstrate. In an oscillation wavelength stabilizing apparatus for a lightsource, the light source is a semiconductor laser which includes: anactive region for providing gain; and a distributed Bragg reflection (DBR)region for controlling an oscillation wavelength. The apparatus includes acontrol section which monotonously varies, in a first direction, a DBRcurrent to be input to the DBR region while detecting the oscillationwavelength of an output light of the semiconductor laser so as to detect aDBR current value I.sub.o corresponding to a predetermined wavelengthvalue, and then monotonously varies the DBR current in a second directionwhich is opposite the first direction beyond the detected value I.sub.o,and then monotonously varies the DBR current in the first direction againto set the DBR current at the detected value I.sub.o, thereby fixing theoscillation wavelength of the semiconductor laser chip at thepredetermined wavelength value.

Inventors: Kitaoka; Yasuo (Osaka, JP), Yamamoto; Kazuhisa (Osaka, JP), Kato; Makoto (Hyogo-ken, JP), Mizuuchi; Kiminori (Osaka, JP), Nishiuchi; Kenichi (Osaka, JP)

Assignee:

International Classification:

Expiration Date: 10/02/2013