Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Flexible quantization
Method for manufacturing photoelectric conversion device
Method and system to generate finite state grammars using sample phrases
Transducer displacement protection
Probe for ultrasound diagnostic apparatus
Systems and methods for unchoked control of gas turbine fuel gas control valves
Semiconductor device and method of manufacturing the same
  Randomly Featured Patents
Nano-structured device for analysis or separation, and its preparation and application
Apparatus for dewatering a pulp web
Composite adsorbent beads for adsorption process
Wrist rest
System and method for identifying and treating calls
Strap suspension for containers
Stocking
Construction for mounting mesh bags on bag handling portion of automatic weigher/bagger machine
Robust wideband symbol and frame synchronizer for power-line communication
Cart