Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Optical receiver using Mach-Zehnder interferometer










Image Number 18 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
Therapeutic rinse in a self-heating package
Method and apparatus for a battery docking connector having reserve power for hot battery swap
Wafer level package and fabrication method
DKK1 oncogene as therapeutic target for cancer and a diagnosing marker
Display fixture for highlighting products
Moving structure and micro-mirror device using the same
Churn prediction and management system
  Randomly Featured Patents
Combating arthropods with O-alkyl-O-[5-carbalkoxy-7-alkyl-pyrazolo(1,5-.alpha.)-pyrimidin-2-yl]-(t hiono) (thiol)-phosphoric (phosphonic) acid esters
Nozzle inlet enhancement for a high speed turbine-driven centrifuge
Magnetic recording component
Movable body drive system and movable body drive method, pattern formation apparatus and method, exposure apparatus and method, device manufacturing method, and decision-making method
Metal working lubricant compositions
Ink jet inks containing linear polymer additives
Convective warming device with a drape
Reproduction signal evaluation method
Directional and limiting gate
Mobile phone holder for mechanical vehicles