Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Optical transmitter and optical transmission system










Image Number 11 for United States Patent #7116917.

The present invention suppresses to a minimum the degradation of the transmission quality caused by chromatic dispersion characteristic of an optical transmission medium, and the interplay between the chromatic dispersion and non-linear optical effects in dense WDM transport systems. A baseband input data signal is pre-coded in advance by a pre-coding unit, phase modulation is carried out using a pre-coded signal by the optical phase modulating unit, and the phase modulated optical signal is converted to an RZ intensity modulated signal by the optical filter unit that performs phase-shift-keying to amplitude-shift-keying conversion. For example, an optical phase modulating unit generates an encoded DPSK phase modulated signal using a differential phase shirt keying (DPSK) format, and a phase modulated signal is converted to an RZ intensity modulated signal by the optical filter unit disposed downstream of the optical phase modulating unit.








 
 
  Recently Added Patents
Insulin derivative
Pointer display device, pointer display/detection method, pointer display/detection program and information apparatus
Biomarkers of gastric cancer and use thereof
Flame-retardant polyamide composition
Digital display devices and digital projectors with expanded color gamut
Range extension techniques for a wireless local area network
Heteroleptic iridium complexes as dopants
  Randomly Featured Patents
Anti-reflective coating compositions comprising polymerized aminoplasts
Naphtholactam dyestuffs
Method and apparatus for collecting, processing and distributing differential global positioning system information using the internet
Stable gene amplification in chromosomal DNA of prokaryotic microorganisms
Optical sensor arrangement for start of scan detection and improved vertical beam alignment range
Hydrodynamic heat generator for a motor vehicle
Optical recording media
Center release drive sled
Neonatal hood
Automotive navigation system