title: Wide, tunable band rejection filter based on micro-optical waveguide on microactuating platform covering O, E, S, C, L, and U bands.
abstract: An ultrawide, tunable band rejection filter was experimentally demonstrated operating from 1060 to 1670 nm seamlessly covering all communication bands (O, E, S, C, L, and U bands). The device consists of a micro-optical waveguide made from fused taper fiber coupler mounted over a microactuating platform that systematically applies a highly localized torsional stress over the coupling region. High-band rejection efficiency of 20-30 dB and very low insertion loss of 0.2 dB were experimentally achieved over the whole operating spectral range.
authors.affiliation: Department of Physics, College of Science, Yonsei University, Seoul, South Korea.
authors.forename: Honggu
authors.initials: H
authors.lastname: Choi
authors.forename: Yoonseob
authors.initials: Y
authors.lastname: Jeong
authors.forename: Kyunghwan
authors.initials: K
authors.lastname: Oh