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
Advanced joint detection in a TD-SCDMA system
Deflection device for a scanner with Lissajous scanning
Magnetic levitation motor used in lens module
Reception method and reception apparatus
Method and apparatus for providing very high throughput operation and capability signaling for wireless communications
Tray for microwave cooking and folding of a food product
System and method for terminating communication sessions with roaming mobile devices
  Randomly Featured Patents
Composition and method for controlling toilet odor
Baffle for conversion of fine bubbles to coarse while filtering with a vertical skein of hollow fibers
4,5-Dichloroimidazole-2-carboxylic acid derivatives
Live set transmission in pipelining applications
Treatment of T-cell mediated diseases
Electrical insulating compositions containing zinc oxide and an organosilicon compound containing at least one silicon-hydrogen bond
Encoder for recording incremental changes
Record carrier, playback device and method of recording information
Icon for a portion of a display screen
Method and recording apparatus for detecting rear edge of a recording medium