Title :
Ultracompact Intrinsic Micro Air-Cavity Fiber Mach–Zehnder Interferometer
Author :
Park, Minkyu ; Lee, Sejin ; Ha, Woosung ; Kim, Dae-Kyu ; Shin, Woojin ; Sohn, Ik-Bu ; Oh, Kyunghwan
Author_Institution :
Dept. of Phys., Yonsei Univ., Seoul, South Korea
Abstract :
A compact intrinsic fiber Mach-Zehnder interferometer (MZI) is proposed and experimentally demonstrated by incorporating a micro air-cavity ablated by femtosecond laser irradiation. A short cavity of length ~ 10 mum along the single-mode fiber core provided two optical paths: one propagating through the air and the other guided along the ring-shaped silica cladding. A spectral analysis confirmed MZI in a good agreement with experimental results. Temperature-dependent spectral shifts were measured and analyzed.
Keywords :
Mach-Zehnder interferometers; high-speed optical techniques; laser ablation; micro-optics; microcavities; optical fibre cladding; optical fibre fabrication; optical fibre testing; silicon compounds; Mach-Zehnder interferometer; SiO2; femtosecond laser irradiation; laser ablation; optical path propagation; ring-shaped silica cladding; single-mode fiber core; spectral analysis; temperature-dependent spectral shift measurement; ultracompact intrinsic micro air-cavity fiber; All-fiber device; Mach–Zehnder interferometer (MZI); interference filter; laser micromachining;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2009.2021278
