title: Ultracompact in-line broadband Mach-Zehnder interferometer using a composite leaky hollow-optical-fiber waveguide.
abstract: We report on an ultracompact fiber optic Mach-Zehnder interferometer (MZI) using a novel concatenated structure, single-mode-fiber (SMF)-hollow optical fiber (HOF)-SMF. An optimized air-hole size in the HOF provided two unique optical paths; the leaky waveguide modes through the central air hole and the radiation channel into the silica cladding, which enabled a compact MZI configuration with enhanced optical performances, such as high visibility, high temperature sensitivity, and wide dynamic range.
authors.affiliation: Optoelectronics Research Centre, University of Southampton, Southampton, UK.
authors.forename: Yongmin
authors.initials: Y
authors.lastname: Jung
authors.forename: Sejin
authors.initials: S
authors.lastname: Lee
authors.forename: Byeong Ha
authors.initials: BH
authors.lastname: Lee
authors.forename: Kyunghwan
authors.initials: K
authors.lastname: Oh
mesh_terms: D003198:Computer Simulation; D004867:Equipment Design; D005336:Fiber Optic Technology; D007368:Interferometry / Q000379:methods*; D055096:Optical Devices; D055100:Optical Fibers; D055095:Optics and Photonics; D012031:Refractometry / Q000379:methods; D012822:Silicon Dioxide / Q000737:chemistry*; D013696:Temperature
chemical_list: D012822:Silicon Dioxide