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 μm 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.
Bibliographical noteFunding Information:
Manuscript received December 16, 2008; revised March 24, 2009. First published May 08, 2009; current version published July 10, 2009. This work was supported in part by KOSEF (Programs ROA-2008-000-20054-0, R01-2006-000-11277-0, and R15-2004-024-00000-0), in part by KICOS (Programs 2007-8-0536 and 2007-8-1864), in part by ITEP (Programs 2007-8-2074 and 2008-8-1195), and in part by the Brain Korea 21 Project of the KRF.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering