Tension and Torsion Sensing With a Double-Taper Mach-Zehnder Interferometer

Abstract

A novel setup for a Double-Taper Mach-Zehnder Interferometer (DTMZI) is presented to measure axial strain and torsion. An epoxy section is added between the two tapers as a fixture to ensure torsion sensing. The modal filtering effect of the epoxy upon the interferometry response is experimentally verified. The transmission spectrum of DTMZI under strain and torsion is modelled and further analyzed through the differential accumulated phase between the beating modes.The experimental spectral observation confirms our estimate. The relationships between the spectral shifts in wavelength and applied displacements are obtained. The sensor shows a very high sensitivity against the applied strain and twists.

Sagnac interferometry and the impact of conductivity-dependent Raman gain on rotary photon drag

“…Researchers have proposed electronic MZI analogous to its optical counterpart, enhancing sensitivity through quantum Hall effect manipulation [37]. The MZI has been used in various systems and models [38][39][40][41]. Similarly, Strodumov and his colleagues proposed a fiber SI for highly sensitive temperature sensing [42].…”

Temperature-Compensated Multi-Point Strain Sensing Based on Cascaded FBG and Optical FMCW Interferometry

“…In terms of sensing principle, the fiber optic strain sensors proposed so far can be divided into three types. The first type is an interferometric fiber optic strain sensor, such as an all-fiber optical demodulator, based on the Michelson interferometer (MI) for signal interrogation [ 1 ]; ultra-sensitivity strain [ 2 ] and high-temperature strain [ 3 ] measurement are realized based on the Fabry-Perot interferometer (FPI), a hybrid interferometer that can measure strain and temperature simultaneously, composed of FPI and MI cascade with each other [ 4 ], and strain sensors based on the Mach-Zehnder interferometer(MZI) [ 5 , 6 , 7 ], etc. The second type is a fiber Bragg grating strain sensor, which is mainly used for structural health monitoring in the engineering field [ 8 ].…”

Sagnac interferometry and self-Kerr nonlinearity dependent photon drag

“…Interferometric techniques that can easily be incorporated in present day quantum-atom optics laboratories have widely been used to examine photon drag and many other effects that include light matter interaction [38][39][40][41][42][43][44][45][46]. For example, a Sagnac interferometer has a ring-type structure that causes phase shift of light when subjected to rotation [47].…”