High-speed and highly repeatable polarization-state analyzer for 40-gb/s system performance monitoring

We demonstrate a fast (<1 ms), all solid-state, highly repeatable, and accurate polarization-state analyzer based on magnetooptic polarization switches. The module is further used for optical signal-to-noise-ratio performance monitoring in a 14/spl times/40-Gb/s wavelength-division-multiplexing system.