Resources Contact Us Home
Optical apparatus and method for producing the same

Image Number 17 for United States Patent #5835650.

A light generating apparatus includes: a submount; a semiconductor laser chip mounted on the submount; a substrate which is mounted on the submount and includes an optical waveguide; and a substance having a predetermined thickness which is disposed between the semiconductor laser chip and the substrate. In an oscillation wavelength stabilizing apparatus for a light source, the light source is a semiconductor laser which includes: an active region for providing gain; and a distributed Bragg reflection (DBR) region for controlling an oscillation wavelength. The apparatus includes a control section which monotonously varies, in a first direction, a DBR current to be input to the DBR region while detecting the oscillation wavelength of an output light of the semiconductor laser so as to detect a DBR current value I.sub.0 corresponding to a predetermined wavelength value, and then monotonously varies the DBR current in a second direction which is opposite the first direction beyond the detected value I.sub.0, and then monotonously varies the DBR current in the first direction again to set the DBR current at the detected value I.sub.0, thereby fixing the oscillation wavelength of the semiconductor laser chip at the predetermined wavelength value.

  Recently Added Patents
Radiation detector array
Managing imaging of computing devices
Digital photographing apparatus and control method for evaluating validity of an auto-focus operation
Package for product
Buried object detection in GPR images
Redundant parallel operation of motor vehicle electrical system generators
Permeable pressure sensitive adhesive
  Randomly Featured Patents
Apparatus for and method of transmitting video signal
Quick-disconnect fluid coupling
Zoom lens, lens barrel and image pickup apparatus
Access and support system for convertible furniture
Bacterial control of Fusarium dry rot of potatoes
Tool for opening cable fittings
Cationic alpha-cyano-p-dimethylaminocinnamoyl dyes and paper dyed therewith
Poultry feeder
Method and system for enhancing the safety of a region