Optical fiber internal mirror based fiber in-line Mach-Zehnder interferometer

摘要

An optical fiber in-line Mach-Zehnder interferometer based on a fiber internal mirror constructed by use of a hollow ellipsoid fabricated by femtosecond laser micromachining and fusion splicing technique is demonstrated. The interface of the hollow ellipsoid surface and air can act as an internal mirror. The device has been used for refractive index, bending and high temperature measurement and simultaneous multiple parameter sensing.