A simple white-light fiber-optic interferometric sensing system for absolute position measurement

Crosstalk analysis of the in-line quasi-distributed low-coherence low-finesse Fabry–Pérot fiber-optic interferometric sensors

“…Considering the maximal number of the sensors, it can be estimated from the OPD measurement range of the OS and the minimal allowable value of the adjacent sensor length difference. Assuming typical spectral resolution of the of-the-shelf low-cost OS of about Dk % 0.3 nm and typical SLD central wavelength of about k 0 % 850 nm, the OPD measurement range of such a sensing configuration is OPD max % k 2 0 =ð4DkÞ % 600 lm [11]. In order to multiplex the sensors, the OPD difference between adjacent sensors, that is given by DOPD = 2n C DL, must be greater then the SLD coherence length, i.e.…”

Optical Fiber Interferometers and Their Applications

“…Each of the single mode and multi-mode fibers has their own advantages and disadvantages. For example usually white light single mode fiber interferometer provides stable and large signal to noise ratio while in the interferometers based on multi-mode fiber, cheaper optical components are employed (Song et al, 2001;Manojlovi et al, 2010). Generally there are several WLI topologies corresponding to the standard optical fiber interferometer and their combinations (Yuan, 2002;Mercado et al, 2001;).…”

Ultrasensitive Displacement Sensor Based on Photonic Crystal Fiber Modal Interferometer

“…There are several fields like structural health monitoring, aeronautics where smaller change in displacement has several effective consequences. Based on optical fibers several sensors like fiber optic Fabry-Perot interferometer, white light fiber optic interferometer have been developed [4,5]. The advantages of fiber optic displacement sensors over those based on electronic technique are their immunity to electromagnetic interference and chemical corrosion, low weight, remote sensing capability and multiplexing [3].…”