High performance 1/spl times/2 wavelength-selective switch comprising string of 2/spl times/2 optical switches sandwiching channel-rejection devices

摘要

The authors propose a 1/spl times/2 wavelength-selective switch in which each selected channel signal bypasses its associated channel selection device. Experiments using an 8-channel 10 Gbit/s wavelength-division multiplexing (WDM) signal show that this configuration results in high filter performance with a crosstalk value of <38 dB, a flat passband as wide as the channel spacing, and satisfactory among-channel insertion loss uniformity with a ripple of no more than 0.1 dB.