PLC type compact variable optical attenuator for photonic transport network

摘要

The authors propose a compact non-mechanical variable attenuator based on silica-based planar lightwave circuits (PLC). The fabricated variable attenuator achieves 20 dB attenuation with a polarisation sensitivity of >1 dB, a wavelength range over 20 nm, and rise and fall times of >400 /spl mu/s.