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
Anomalous data detection method
Radio communication system, base station apparatus, terminal apparatus, and radio communication method for radio communication system
Event-associating software application for accessing digital media
Human embryonic stem cell methods and PODXL expression
Systems and methods for providing live voicemail to a mobile handset
Preamplifier-to-channel communication in a storage device
System and method for order placement in an electronic trading environment
  Randomly Featured Patents
Self-calibrating hydraulic fluid leak detection system
Microphone suitable for professional live performance
Vehicle steering apparatus
Acrylonitrile copolymer, and fiber or core-sheath conjugate fiber prepared therefrom
Oral delivery of discrete units
Extended-release chemical formulation in tablet form for urine pretreatment
Electrical connector
Location device and system using UWB and non-UWB signals
Thermal retention device
Production of layer-type magnetic recording media