Resources Contact Us Home
Optical receiver using Mach-Zehnder interferometer

Image Number 15 for United States Patent #7995930.

The present invention relates to an optical receiver, in which the transmittance of a Mach-Zehnder interferometer can be locked at a normal operation point in a simple structure and control. A transmittance detecting circuit and a minute modulation signal detecting circuit are provided in parallel after a balanced optical receiver, and a switch is selectively connectable either a minute modulation signal detecting circuit and a transmittance detecting circuit. In the initial stage of frequency pull-in, the switch is set to connect the transmittance detecting circuit to the synchronous detection circuit. If the transmittance detecting circuit detects that the transmittance of the Mach-Zehnder interferometer at the carrier frequency becomes a desired transmittance, the connection of the switch is switched from the transmittance detecting circuit to the minute modulation signal detecting circuit.

  Recently Added Patents
Systems and methods for processing supplemental information associated with media programming
Method for production of a thermoelectric apparatus
Light emitting device and electronic device
Motor vehicle, toy and/or replica
Boring machine
Rose plant named `ESM R057`
  Randomly Featured Patents
Pan and tilt camera
Digital manufacturing with amorphous metallic alloys
Process for the preparation of nitrosyl chloride
Composite water treatment vessel including liquid distributor plates
Method and apparatus optimizing a radio link
Method of manufacturing a flash memory device
Method of monitoring temperature exposure
Personal hygiene article with vibrating part and method
Pumping system with failure responsive discharge valve
Polycarbonate composition from branched chain dihydric phenol