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
Method of making a CIG target by spray forming
Method and apparatus for error correction in MBMS receipt system
Edge alphas for image translation
Image forming apparatus having a primary transfer unit, a secondary transfer unit, and a direct transfer unit
Media processing method and device
Method and apparatus for controlling peak amplifier and doherty power amplifier
Method and an apparatus for processing an audio signal
  Randomly Featured Patents
Method of preparing collagen extrusion gels
User generated dynamic mobile service
Computer conferencing system with real-time multipoint, multi-speed, multi-stream scalability
Method and apparatus for identifying errors in a detected sequence of values
Process and intermediates for the synthesis of Vitamin D.sub.3 metabolites and chenodeoxycholic acid
Zinc protoporphyrin test system
Revenue balancing method and computer program
Liquid crystal display with improved image quality
Process to remove radioactive elements present in bulk low-grade waste
Live attenuated newcastle disease virus vaccines and preparation thereof