Title :
Tunable stopband filter by using differential strains in all-fiber acoustooptical filter
Author :
Li, Hao ; Zhang, Ying ; Wen, Changyun ; Soh, Yeng Chai
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore
fDate :
3/1/2005 12:00:00 AM
Abstract :
This letter presents a tunable stopband filter by using an all-fiber acoustooptical tunable filter (AF-AOTF) subject to differential strains. With the proposed filter, narrow and wide tunable stopbands of 0.4-nm 12-dB bandwidth and 4-nm 12-dB bandwidth, respectively, are demonstrated by experiments. Compared to the conventional approach of simply cascading two stages of AF-AOTFs to produce the same stopband, the proposed filter has improved the tunability of stopband.
Keywords :
acousto-optical filters; band-stop filters; optical fibre filters; optical tuning; acoustooptical filter; all-fiber filter; differential strains; stopband filter; tunable filter; tunable stopbands; Band pass filters; Bandwidth; Capacitive sensors; Optical attenuators; Optical distortion; Optical fiber filters; Optical fibers; Optical filters; Optical pulses; Wavelength division multiplexing; Acoustooptical tunable filter (AOTF); band-rejection filter; fiber optics; optical filter; stopband filter; tunable filter;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.841009
