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










Image Number 16 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
Mobile electronic device
Dithering method and apparatus
System and method for producing statistically valid assay means and ranges for quality control materials
Scanning of a touch screen
Illuminating device
Composition for enhancing memory and mitigating neurodegeneration and method thereof
Image erasing apparatus and recording medium conveying method for image erasing apparatus
  Randomly Featured Patents
Method and apparatus for measuring phase
Device for generating an electric trigger pulse
Arm shade
Refrigerant suction structures for compressors
Synthesis of polysuccinimide and copoly(succinimide-aspartate) in a supercritical fluid
Low power CMOS fuse circuit
Antenna ornament
Drop volume dispensing closure
Water pressure operated water pump
Hydrofining process