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










Image Number 14 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
Catalyst compositions for hydroformylation reaction and hydroformylation process using the same
Shoe
Polyurethane resin, toner for developing electrostatic charge image, electrostatic charge image developer, toner cartridge, process cartridge, image forming apparatus, and image forming method
Power collecting device, power measuring device, and power collecting method
Doherty amplifier circuit
Compositions of PD-1 antagonists and methods of use
Injection molding method and injection molding machine
  Randomly Featured Patents
Apparatus and process for the refrigeration, liquefaction and separation of gases with varying levels of purity
Electrical plug and method of fitting the plug
Scooter frame with a wheel
Method for locating on a cornea an artificial lens fabricated from a collagen-hydrogel for promoting epithelial cell growth and regeneration of the stroma
Retractable tool bit having slider type catch mechanism
Synthesis of FR901464 and analogs with antitumor activity
Interchangeable part for workpiece fixture
Multi-chip package structure
Method of induction-hardening machine components
Intercrossedly-stacked dual-chip semiconductor package and method of fabricating the same