摘要 |
<P>PROBLEM TO BE SOLVED: To provide a new method, an apparatus, and a system for processing an optical signal, independently of the bit rate of the optical signal, pulse shape or the like. <P>SOLUTION: In the apparatus provided with an optical divider to divide an input optical signal into a first optical signal and a second optical signal, a waveform forming unit into which the first optical signal is input, a timing extracting unit which generates a clock pulse based on the second optical signal, an optical AND circuit into which an optical signal output from the waveform forming unit and a clock pulse output from the timing extracting are input, the timing extracting unit includes an optical waveguide structure which provides nonlinear optical effects so that chirping occurs in the second optical signal and an optical bandpass filter, into which an output optical signal output from the optical waveguide structure is supplied for extracting components other than the small components of the chirping; and the optical bandpass filter has a pass band which includes wavelength different from the wavelength of the optical signal. <P>COPYRIGHT: (C)2005,JPO&NCIPI |