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
Image-processing method and program, and image-processing apparatus
Management of computer-file sharing between at least two devices
System and method for combining different tablets into a pouch
Lighting elements
Asynchronous distributed de-duplication for replicated content addressable storage clusters
Nonvolatile semiconductor storage device having conductive and insulative charge storage films
Wind driven generator for vehicles
  Randomly Featured Patents
Fluorescent lamp employing means for controlling emission of short wavelength ultraviolet radiation
Steel newspaper rack
Camera
Real-time video editing
Prostaglandin intermediate
Molded case electric circuit breaker mounting assembly
Security lock
Adaptive scalable cache coherence network for a multiprocessor data processing system
High definition multimedia interface connector
Method for suppressing partial coloration in immunoassays utilizing peroxidase labels