Ultrawidely tunable single-mode fiber acousto-optic filter
Optical Fiber Communication Conference and Exposition(2011)
摘要
A single-mode fiber (SMF) acousto-optic tunable filter (AOTF) with a tuning range of more than 300 nm is demonstrated. The SMF used in the experiment has a ring of symmetric holes within the cladding, which causes a larger mode-index difference between the first and the second higher-order antisymmetric modes than those of a conventional SMF. As a result, the difference in beatlengths between the core mode and the higher-order modes is highly increased, which makes it possible for the SMF AOTF to exhibit a single resonance peak in the transmission spectrum over the wavelength range of 1.3-1.6 μm for given acoustic frequencies of 3.1-3.8 MHz.
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关键词
acousto-optical filters,optical fibre cladding,optical fibre filters,optical tuning,smf,air hole,cladding region,higher order mode,single resonance peak,transmission spectrum,ultrawidely tunable single mode fiber acousto optic filter,optical fiber,fiber optics,single mode fiber,optical fiber sensor,optical filters
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