Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Optical transmitter apparatus










Image Number 10 for United States Patent #7657190.

An optical DQPSK modulator comprises a pair of phase modulators. Each of the pair of the phase modulators is provided with first and second driving signals. The first and second driving signals are amplified by first and second amplifiers, respectively. An RZ intensity modulator generates an optical RZ-DQPSK signal from an optical DQPSK signal output from the optical DQPSK modulator. A photodetector generates a monitor signal from the optical RZ-DQPSK signal. A gain adjuster unit adjusts the gains of the first and second amplifiers so as to minimize the power of the monitor signal.








 
 
  Recently Added Patents
Antimicrobial polysiloxane materials containing metal species
Systems for usage based rate limiting over a shared data link
Lithographic apparatus and device manufacturing method
Audio conversation apparatus
Regulating a supply voltage provided to a load circuit
Lens system
Plants and seeds of hybrid corn variety CH367819
  Randomly Featured Patents
Airborne fiber optic decoy architecture
Method for monitoring a proper functioning of an integrated circuit
Process and apparatus for producing glazed ceramic tiles, and tiles so obtained
Golf club head
Containing an AITa or AITi pre-seed layer, a CoCr onset layer and a CoCrPtB magnetic layer
Flux mitigation
Process for the production of hexafluoropropylene oxide
Thermally-sensible overcurrent protective relay including automatic resetting mechanism
Automated fader system
Skid loader attachment