Resources Contact Us Home
Semiconductor laser

Image Number 8 for United States Patent #8488637.

A semiconductor laser includes a light emission end facet; a first optical waveguide extending in a predetermined optical-axis direction, the first optical waveguide being optically coupled to the light emission end facet; a ring resonator having a plurality of periodic transmittance peak wavelengths, the ring resonator being optically coupled to the first optical waveguide; a plurality of gain waveguides that generate light by injection of current; an optical coupler portion that optically couples the first optical waveguide to each of the plurality of gain waveguides; and a plurality of second optical waveguides including diffraction gratings, the plurality of second optical waveguides being respectively optically coupled to the plurality of gain waveguides. Also, each of the diffraction gratings in the plurality of second optical waveguides has a different reflection band.

  Recently Added Patents
Control system of substrate processing apparatus, collecting unit, substrate processing apparatus and control method of the substrate processing apparatus
Sperm factor sequences
Process for producing a plasma protein-containing medicament with reduced concentration of citrate and metals
Cross-linkable compositions
Restore software with aggregated view of content databases
Method for growing group III-nitride crystals in supercritical ammonia using an autoclave
Display module
  Randomly Featured Patents
Filter material containing thermoplastic, elastomer copolyether esters, method of producing the same, use thereof, and filter press therefrom
System and process for controlling a person
Non-volatile electronic memory and method for the management thereof
Variable control of weld torch parameters
Milking parlor stanchion module
Lens with hydrophilic coating
Stable silicone-coated release liner for pressure-sensitive adhesive sheets
Tiled output mode for image sensors
Overmoded waveguide elbow and fabrication process