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
Cutting apparatus
Digital Microphone Automixer
Polymer-coated liquid packaging board, a package formed from it and the use of the polymer
Intelligent storage device controller
Multi-level memory device using resistance material
Semiconductor package with through silicon vias and method for making the same
Outlet box adaptor
  Randomly Featured Patents
Electronic power switch
Tire tread
Bearing for the gear shift lever of the gear change box in motor vehicles
Exercise device with resistance mechanism having a pivoting arm and a resistance member
System and method for consistent detection of mid-sagittal planes for magnetic resonance brain scans
Method of and apparatus for cutting developed film
Electronic endoscope forming still image by double-speed reading
Modification for internal combustion engine providing improved fuel economy
Roller grill assembly for cooking human food
Servo motor for actuating a mandrel while extruding helical teeth