title: V-groove all-fiber core-cladding intermodal interferometer for high-temperature sensing.
abstract: Novel V-groove all-fiber core-cladding intermodal interferometers fabricated by CO2 laser irradiation on a standard single-mode fiber are described. The high-order cladding modes are excited due to the special V-groove structure. The interferometers are classified as Mach-Zehnder and Michelson type based on the way they are structured. Benefiting from the large difference of thermal coefficients of the core and high-order cladding modes, both types receive high temperature sensitivity by monitoring the wavelength shift of the interference spectrum, and their responses to temperature are similar. Compared with the Mach-Zehnder interferometer, the Michelson interferometer is more compact and more flexible in application.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Yin
authors.forename: Youfu
authors.initials: Y
authors.lastname: Geng
authors.forename: Xuejin
authors.initials: X
authors.lastname: Li
authors.forename: Xiaoling
authors.initials: X
authors.lastname: Tan
authors.forename: Rong
authors.initials: R
authors.lastname: Gao