Resources Contact Us Home
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
Method and system for enhanced granularity in fencing operations
Optical module, optical module connector, and optical deflection member
Geographical and dispensing limits for E-promotions
Systems and methods for providing collaborative coexistence between Bluetooth and Wi-Fi
Battery pack
Environmental gesture recognition
System for cyber investigation and data management
  Randomly Featured Patents
Combination knob for fishing reels
Method for the preparation and doping of highly insulating monocrystalline gallium nitride thin films
Water cooled door for blenders
Variable data rate improvement of disc cache subsystem
Voice-controlled communications system and method having an access device
Ditcher head assembly for cleaning ditches
Gypsum composition
Method for producing alcohol
Neutron-beam based scanning system having an automatic object identification and attribute information acquisition and linking mechanism integrated therein
Charging apparatus and image forming apparatus