| 摘要 |
PROBLEM TO BE SOLVED: To reduce a loss and loss deviation. SOLUTION: N-wavelength multiple signals f1-fN are branched into (n) by a brancher 1 and inputted to an L×L wavelength router 3, and optical wavelength multiple signals are multiplexed/demultiplexed and inputted to (k) wavelength selecting parts 13 (130-13k-1). In the first wavelength selecting part 130, (m) outputs from the wavelength router are gated by (m) optical gates 5, the outputs of the respective gates are inputted to an L1×L1 wavelength router 70, (n) outputs of the wavelength router are synthesized through (n) optical gates 9 by a synthesizer 11, in the remaining wavelength selecting parts 13i, (m+1) outputs from the wavelength router 3 are gated by (m+1) optical gates 5, the outputs are inputted to an Li×Li wavelength router 7i, (n) outputs of these wavelength routers are synthesized through (n) optical gates 9 and the synthesizer 11, and the signal of arbitrary one channel of N-wavelength multiple signal is selectively outputted from the respective wavelength selecting parts 13. |
