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
Rose plant named `ESM R044`
Stand for food service
Digital signal processing apparatus, liquid crystal display apparatus, digital signal processing method and computer program
Fan guide
Elastic polypropylene-based film compositions
Correction information calculating device, image processing apparatus, image display system, and image correcting method
Semiconductor light-receiving device
  Randomly Featured Patents
Portable diagnostic handset
Method of locating an enabling component containing a transponder, and a motor vehicle with a corresponding locator
Table cover and method of making same
Adaptive-predictive control system
System and method for access control and for supply chain management via a shared bill of material
Method for manipulating a stack pointer with post increment/decrement operation
Alkali metal switch device
(Methylsulfonyl)phenyl-2-(5H)-furanones as COX-2 inhibitors
Moulding system for moulding a mass such as a mass of meat