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
Switching element for a valve train of an internal combustion engine
Monitoring heap in real-time by a mobile agent to assess performance of virtual machine
Adjustable voltage regulator with dynamic voltage compensation
Method, apparatus and computer program product for providing metadata entry
Wire guide
Key management system
Lateral double diffused metal oxide semiconductor device and method of manufacturing the same
  Randomly Featured Patents
Method and system for mitigating distributed denial of service attacks using centralized management
Exhaust gas oxygen sensor monitoring
Football-shaped container
Circuit for regeneration and bandwidth limitation of a quasi-periodic digital signal
Vehicle floor covering with integral threaded drain tube and method of making same
Process and composition for stabilization of ar-brominated styrenic monomer
Production of halogens by electrolysis of alkali metal halides in an electrolysis cell having catalytic electrodes bonded to the surface of a solid polymer electrolyte membrane
CATV distribution networks using light wave transmission lines
Ducted fan gas turbine engine
Discharging molten metal from a smelting furnace