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Item type:Item, Analysis of Thermo-Optic Tunable Dispersion-Engineered Short-Wavelength-Pass Tapered-Fiber Filters(2009-07-01) ;Chou, Sen-Yih ;Hsu, Kuei-Chu ;Chen, Nan-Kuang ;Liaw, Shien-KueiChih, Yu-SyunThermo-optic tunable short-wavelength-pass tapered-fiber filters based on fundamental-mode cutoff mechanism are realized experimentally and analyzed theoretically. The effects of material and waveguide dispersion are investigated and the optimal tapered fiber structures for attaining high-spectral cutoff slope and high-rejection efficiency are determined.Item type:Item, Wideband tunable Gaussian-shaped spectral filters based on dispersion engineering(2009-08-01) ;Hsu, Kuei-Chu ;Chen, Nan-Kuang ;Chou, Sen-Yih ;Liaw, Shien-KueiLai, YinchiehOptical liquids can be used to engineer the dispersion characteristics of fibers by serving as the core or cladding to attain fundamental-mode cutoff effect. The short-/long-pass fiber filters are so made and concatenated to achieve widely thermo-optic tunable Gaussian-shaped spectral filters. The proposed wideband tunable Gaussian-shaped spectral filter provides a potential technique in application to high resolution bio-imaging. (C) 2009 Elsevier Inc. All rights reserved.