Patent ID: 6842565

Claim:
An optical modulation/multiplexing circuit comprising: (N+1) input ports each for inputting one of an optical clock signal with a fixed repetition period t and N optical modulation signals with the period t, where N is an integer greater than one; splitting means for splitting the optical clock signal into N portions; first combining means for making each of N optical clock signals, split by said splitting means, delay with certain time differences, and for multiplexing each of the N optical modulation signals with one of the optical clock signals made delay with the time differences; N nonlinear optical media each for receiving one of output light beams from said first combining means, and for generating an output light beam by second order nonlinear optical effect; second combining means for receiving N output light beams said N nonlinear optical media generates and for multiplexing them after making them delay with certain time differences; and means for optically extracting from the output of said second combining means, only signal pulses corresponding to a wavelength component newly produced in said nonlinear optical media, wherein the output of said second combining means, includes the wavelength component newly produced in said nonlinear optical media, and signal pulses arranged at a regular period t/N on a time axis without being overlapped.