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
Method and system for modeling external volume changes within an acoustic echo canceller
Semiconductor device and fabricating method thereof
Systems and methods for market order volume clearing in online trading of credit derivatives
Multi-hop wireless terminal and traffic control method thereof
Silicon-carbonaceous encapsulated materials
Vibrating element, vibrator, and electronic apparatus
Apple tree named `WA 38`
  Randomly Featured Patents
Variable valve timing controller for internal combustion engine
Atomizer
Method and apparatus for salvaging large pipe elbows
Inverter control for third rail head end power
Methods and systems to distribute client software tasks among a number of servers
Image signal receiver for diagnosing and editing channel, and control method thereof
Rechargeable lamp
Wheel rim for a pneumatic tire
Material handling apparatus
Gaura plant named `Gaudwwhi`