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
Suspension with flexure having laminated structure and bonding pads on opposing surfaces thereof, and head gimbal assembly and disk drive unit with the same
Image forming apparatus, control method of image forming apparatus, and storage medium
Duty cycle adjustment of remote illumination source to maintain illumination output
Adapter plate for use in mounting an audio/visual device or the like to a surface
Device for producing a connection grid with an integrated fuse
Electrophotographic photoreceptor and image forming apparatus including the same
Structure of pixel electrode
  Randomly Featured Patents
Wiper blade connector
Methods for genetic diversification in gene conversion active cells
Toner and method for producing the same and developer
Microprocessor controlled rigid disk file subsystem
System for reducing defocusing of an object image due to temperature changes
Dental X-ray head unit
Use of a dihydrochalcone-rich phenolic fraction in a cosmetic treatment
Secure targeted personal buying/selling method and system
Mosaic recorder with improved nozzle structure
Compact disc package with bi-fold panels