Title :
Ultra-broad-band AOTF based on cladding etched single-mode fiber
Author :
Jin, Tao ; Li, Qun ; Zhao, Jianhui ; Cheng, Kai ; Liu, Xiaoming
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
The etching effect on the bandwidth of acoustooptic coupling between core and cladding modes in a single-mode (SM) fiber was investigated experimentally and theoretically. It was found that when the fiber diameter is etched down to a critical value, extremely broadband acoustooptic tunable filter (AOTF) could be achieved. We demonstrated an ultra-broadband acoustooptic filter with -3-dB bandwidth of 362 nm and dynamic range of >14 dB, which is the broadest bandwidth of AOTF on SMF up to now. The results point to potential realization of a new class of high efficient, fast, all-fiber variable optical attenuator.
Keywords :
acousto-optical filters; etching; optical communication equipment; optical fibre cladding; optical fibre filters; optical fibre losses; optical fibre theory; optical tuning; acoustooptic coupling; all-fiber variable optical attenuator; broadest bandwidth; cladding etched single-mode fiber; cladding modes; core modes; dynamic range; etching effect; extremely broadband acoustooptic tunable filter; fiber diameter; ultra-broad-band AOTF; ultra-broadband acoustooptic filter; Acoustic waves; Bandwidth; Etching; Frequency; Optical attenuators; Optical coupling; Optical fiber devices; Optical fiber filters; Optical filters; Optical tuning;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2002.1021993
