Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Semiconductor laser device










Image Number 15 for United States Patent #5442649.

A semiconductor laser includes a semiconductor substrate of a first conductivity type, a gain guiding structure comprising of a first conductivity type, a lower cladding layer disposed on the substrate, an active layer disposed on the lower cladding layer and having a light emitting region, and an upper cladding layer of a second conductivity type, opposite the first conductivity type, disposed on the active layer, and a multiquantum barrier layer interposed between the upper cladding layer and the active layer excluding the light emitting region. In this structure, the multiquantum barrier layer reduces leakage current flowing outside of the light emitting region of the active layer and increases effective current flowing into the light emitting region, whereby the light output of the laser is significantly increased.








 
 
  Recently Added Patents
Communication system including relay station and data frame for the communication system
Variety corn line KDC7040
Quinazoline compounds and their use in perfume compositions
Semiconductor fin device and method for forming the same using high tilt angle implant
Apparatus and method for encoding/decoding signal
Pharmaceutical and diagnostic compositions for use in the treatment and diagnosis of neurodegenerative diseases or amyloid diseases
Methods and systems for temporarily sharing position data between mobile-device users
  Randomly Featured Patents
Method of aligning
Polymeric nanocomposites comprising epoxy-functionalized graft polymer
Long wavelength vertical cavity surface emitting laser with oxidation layers and method of fabrication
Geometry-dependent filtering in CT method and apparatus
Plug module with active-passive switching
Gearless angled spindle
Apparatus and method for stripping windings from a stator
Preparation of varnishes based on polyester resin
Wireless communication structures and methods with enhanced range and performance
Method for removal of ammonia and related contaminants from water