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
Protein kinase C inhibitors and uses thereof
Efficient file system metadata scanning using scoped snapshots
Elegant solutions for fingerprint image enhancement
Triple-trim reference voltage generator
Light modulators and optical apparatuses including the same
Implementing state-of-the-art gate transistor, sidewall profile/angle control by tuning gate etch process recipe parameters
Nonvolatile semiconductor memory device and method for controlling the same
  Randomly Featured Patents
Antioxidant inflammation modulators: novel derivatives of oleanolic acid
Method for producing semiconductor optical device
Sensor arrangement
Liquid crystal display
Personal message center
Universal mount for tire rims
Floor lamp
Bearing device and motor mounted with the bearing device
Ion generator with ionization chamber constructed from or coated with material with a high coefficient of secondary emission
Control valve and electrical and hydraulic control system