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
Semiconductor device element formed on SOI substrate comprising a hollow region, and having capacitors in an electric field alleviation region
Image processing apparatus, image registering method, program causing computer to execute image registering method, and recording medium in which program is recorded
Plants and seeds of corn variety CV294874
Processing autocomplete suggestions
Compounds and compositions for treating chemical warfare agent-induced injuries
3,7-diamino-10H-phenothiazine salts and their use
Switchgear and method for operating switchgear
  Randomly Featured Patents
Color correction system with monitor for use in recalling color corrections and corresponding method
Rotating doppler receiver
Disazo pigment composition and printing ink
Spinal vertebral fusion implant and method
Data coding system and method
Optical device with electrically variable extended depth of field
Spring-piston combination for manually operated pump
Stainless steel chopper/mixer-grinder worm having improved resistance to fatting
Sitting pig shaped garden watering can
Scanning hook overlays and method of manufacture of same