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
Transmitter and receiver modules for unidirectional communications and a method using the aforementioned
Compressor
Case for a portable electronic device
Image forming apparatus and image forming method including a first measuring unit that measures invisible toner
Method for forming a catalyst comprising catalytic nanoparticles and a catalyst support
Method for fabricating light guide plate
Estimating temporal degradation of non-volatile solid-state memory
  Randomly Featured Patents
Method for producing article with different gloss surfaces
High efficiency system for melting molten aluminum
Cathode ray tube
Vibration isolating seal for mounting fans and blowers
Gaming machine for racing game and playing method thereof
Colorimetry device
Vehicle door
Method of applying water soluble internal coating to hot cans
Method for securing software to reduce unauthorized use
Long wavelength light emitting vertical cavity surface emitting laser and method of fabrication