Title :
Phase-Shifted White-Light Interferometry for the Absolute Measurement of Fiber Optic Mach–Zehnder Interferometers
Author :
Jiang, Yi ; Ding, Wenhui ; Liang, Pengjuan ; Fu, Lei ; Wang, Chongwen
Author_Institution :
Sch. of Optoelectron., Beijing Inst. of Technol., Beijing, China
Abstract :
An all-fiber 3 times; 3 coupler based phase-shifted white-light interferometry is presented, with which the absolute optical path difference (OPD) of a Mach-Zehnder interferometer can be measured automatically. The continuous test shows that the variation is ±0.5 μm when measuring a beam length of ~10 m with an OPD of 1847 μm. The technique is successfully demonstrated to measure static measurands, including strain, temperature and weight.
Keywords :
Mach-Zehnder interferometers; fibre optic sensors; optical fibre couplers; optical fibre testing; phase shifting interferometry; absolute optical path difference; allfiber 3x3 coupler based phase-shifted white-light interferometry; fiber optic Mach-Zehnder interferometers; fiber optic sensors; strain measurement; temperature measurement; weight measurement; Optical fibers; Optical interferometry; Optical variables measurement; Phase shifting interferometry; Temperature measurement; Wavelength measurement; 3$,times,$ 3 coupler; Fiber optic sensors; Mach-Zehnder interferometer; white-light interferometry;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2010.2077733
