Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
All-optical time-division demultiplexing circuit and all-optical TDM-WDM conversion circuit










Image Number 16 for United States Patent #6204944.

An all-optical time-division demultiplexing circuit is designed to output all the channels of time-division multiplexed signal pulses to different output ports simultaneously. A pulse stream of time-division multiplexed signal pulses and linearly chirped control pulses synchronized with the signal channels are input into an optical Kerr medium. The optical Kerr medium provides locally cross-phase modulation to the control pulse, depending on the presence or absence of the signal pulses of each signal channel. And the optical Kerr medium modulates the power of the component frequencies .upsilon..sub.1, .upsilon..sub.2, . . . , .upsilon..sub.N of the control pulses in accordance with each of the signal channel, by inducing the optical frequency shift to compensate the control pulse chirp on the optical frequency axis. The Kerr medium outputs a power modulated control light, which is separated in a wavelength-division demultiplexing circuit into component frequencies .upsilon..sub.1, .upsilon..sub.2, . . . , .upsilon..sub.N of the control pulses which are to output to respective ports of corresponding to individual signal channels.








 
 
  Recently Added Patents
Resist composition and method for producing resist pattern
Method of operating an electromechanical converter, a controller and a computer program product
Wristwatch
Mirror elements for EUV lithography and production methods therefor
Illumination apparatus for microlithography projection system including polarization-modulating optical element
Magnetic circuit and speaker using same
Portion of display panel or screen with an icon
  Randomly Featured Patents
Data processor in which external sync signal may be selectively inhibited
Local oscillator frequency correction in an orthogonal frequency division multiplexing system
Flywheel-microturbine system
Frangible electronic sealing security system
Method of making polymeric hose
Asymmetric drive motor for a barrier operator or the like
Aminoplast microencapsulation system
Motion vector detector and video coder
Electron beam radiator with cold cathode integral with focusing grid member and process of fabrication thereof
Antistatic and electrically conducting composition