All-Fiber Acousto-optic Variable Optical Attenuator Based on Fused Taper

摘要

A broad-band tunable optical attenuator based on fused fiber taper is demonstrated experimentally. The device exhibits a 16.4 dB dynamic range with FWHM bandwidth of 200 nm, an insertion loss of 0.2 dB, and a maximum electrical driving power consumption of 13 mW. When the acoustic frequency is equal to the natural vibration frequency of the waist of the fused taper, optical power of any wavelength in the range of 450 nm (1100-1550nm) are all attenuated by 40 dB.