Influence of Crosstalk on Signal Power Based on Arrayed-waveguide Grating as N × N Optical Router

The fact that the signal results in signal-crosstalk is confirmed for arrayed-waveguide grating as N × N optical router,and the relation between the crosstalk and power penalty is obtained.The method reveals the random distributions of optical path phase errors in two multiplexers with channel numbers of 10 and 160. It is shown that the crosstalk must be less than -28 dB for a power penalty below 1 dB at a bit error rate of 1×10 -9 .It is found that when N =100,crosstalk power value is -20 dB with compensation power of 2-3 dB,so the compensation power is not ignored.