| 摘要 |
<P>PROBLEM TO BE SOLVED: To monitor an optical signal wavelength without depending on the power of a light receiving signal in a WDM optical communication system. <P>SOLUTION: An optical receiver 17 to be applied to the WDM optical communication system performs multiplex communication by using the optical wavelength multiplex signal constituted by multiplexing optical signals having a plurality of different wavelength. The receiver 17 is provided with: a first light receiving part 21 which receives the optical wavelength multiplex signal and generates a photocurrent depending on each wavelength of the optical wavelength multiplex signal; and a wavelength monitoring circuit 22 which monitors each wavelength of the optical wavelength multiplex signal. The wavelength monitoring circuit 22 calculates the wavelength of the optical wavelength multiplex signal on the basis of the variation of photosensitivity obtained by monitoring of the photocurrent. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
