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
Switchgear and method for operating switchgear
Vehicle control system
Signal processing and tiered signal encoding
Apparatus and method for adapted deblocking filtering strength
Semiconductor device and method for fabricating the same
Image surveillance system and method of detecting whether object is left behind or taken away
Fixing device and image forming apparatus
  Randomly Featured Patents
Server processing in providing messages for a wireless device connecting to a server
Color display system utilizing a matrix arrangement of triads
Electronic grease gun
Liquid level gauge with removable hall device
Modified conductor array for plasma display panel
Moving light spots in illumination fibers
Positive resist composition and pattern forming method using the same
.alpha.-(Phenylazo)-2,6-dichlorobenzaldimino esters and their use as herbicides
Firewood tote
Ballpoint pen