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
Range extension techniques for a wireless local area network
Selecting a converter operating mode of a PA envelope power supply
Flat panel display device and stereoscopic display device
Method for using a super-slippery thin layer characterized by the method for making same
Circuit arrangement for a piezo transformer, and method therefor
Housing for gas flow indicator
Vending machine
  Randomly Featured Patents
Selectively enabling packet concatenation based on a transaction boundary
Zero end clearance roller for a drum type compactor
Automatically modifying distributed communications
Hot passage manifold system
Method and apparatus for measuring ATM cell rate
Interactive devices
Method for authenticating a user accessing a remote server from a computer
Targeted vectors
Container handling assembly