Broadband variable optical attenuator based on acousto-optic coupling in single-mode fiber

Summary form only given. Single mode fiber acousto-optic tunable filters (AOTFs) operate on the principle of core-to-cladding modes coupling and have loss-filter like spectral characteristics. We demonstrated a novel, ultrabroadband all-fiber AO-based variable optical attenuator that with fast response time, large dynamic range, and low insertion loss.