| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical signal processing circuit, capable of accurately recognizing an optical pulse train for optical label signal of a high-speed time/wavelength region. <P>SOLUTION: An optical wavelength demultiplexer 6 demultiplexes each optical signal of the optical pulse train for optical label signal, a plurality of weighting elements 71<SB>1</SB>, 71<SB>2</SB>to 71<SB>n</SB>weight the signals according to the wavelengths, an optical wavelength multiplexer 8 multiplexes the signals, and an optical intensity splitter 9 equally distributes the signals. Optical waveguides 54<SB>1</SB>, 54<SB>2</SB>to 54<SB>n</SB>delay a plurality of the equally distributed optical signals so as to make them stagger sequentially by pulse interval, the weighting elements 72<SB>1</SB>, 72<SB>2</SB>to 72<SB>n</SB>weight the signals according to delay time, and an optical intensity combiner 10 combines the signals. Then, an optical gate element 11 gates only the optical signals, in which all the optical label signals are weighted according to delay time in addition to the wavelength, simultaneously present, and combined, from the combined optical signals. <P>COPYRIGHT: (C)2004,JPO |
