Optical Fiber Voltage Sensor Based on Michelson Interferometer Using Phase Generated Carrier Demodulation Algorithm

Abstract

We present an optical fiber voltage sensor by Michelson interferometer employing a Fabry-Perot tunable optical filter and the phase generated carrier demodulation algorithm. By mounting a Michelson interferometer fabricated by an optical fiber coupler on a piezoelectric transducer, a dynamic strain would be generated to change the phase difference of the interferometer when the measured voltage is applied on the piezoelectric. The phase generated carrier demodulation method was used to obtain the phase variation of the interferometer by applying demodulate signal on a Fabry-Perot tunable optical filter. The measured voltage can be obtained by the variation of the phase; the random phase shift in the interferometer and the intensity fluctuation of the light source of the sensor can be eliminated. The experiment results show that the relation between the phase variation and the voltage applied on the piezoelectric is approximately linear. The dielectric reliability of the sensor has been verified according to the IEC standard.Index Terms-Optical fiber voltage sensor, Michelson interferometer, Fabry-Perot tunable optical filter, Phase generated carrier 1530-437X (c)

Multiple-Octave-Spanning Vibration Sensing Based on Simultaneous Vector Demodulation of 499 Fizeau Interference Signals from Identical Ultra-Weak Fiber Bragg Gratings Over 2.5 km

“…Fiber vibration sensors have been increasingly recognized as a promising technology for vibration sensing, such as seismic sensing [ 1 ] and underwater acoustic imaging [ 2 ]. At present, the most common methods for vibration sensing are various interferometers including Sagnac interferometers [ 3 ], Mach–Zehnder interferometers [ 4 ], Michelson interferometers [ 5 ] and composite interferometers [ 6 ]. The main advantages of these interference structures are their high sensitivity and wide detectable frequency range, achieved by detecting the optical phase changes caused by vibrations [ 7 ].…”

Output error of converse piezoelectric fiber voltage sensor caused by optical fiber factors

“…Compared with traditional voltage sensor, optical voltage sensor (OVS) has a series of advantages, such as a relative simple setup, intrinsic safety, excellent scale factor, small size, low weight, and, with closed-loop detection, a linear response over an extended dynamic range. [5][6][7][8] Up to date, the two kinds OVS, which the Pockels effect and the converse piezoelectric effect, popular with most researchers. 9 The OVS based on the Pockels effect is more mature and has trial operation equipment.…”

Design and Implementation of a Novel Measuring Scheme for Fiber Interferometer Based Sensors

“…In the literature, the development of all-fiber interferometers with different configurations has yielded considerable results, such as fiber-optic Michelson interferometers (FMI) [1,2,3,4], fiber-optic Mach–Zehnder interferometers (FMZI) [5,6,7,8], fiber-optic Fabry–Perot interferometers (FFPI) [9,10,11,12,13,14,15,16,17], and fiber-optic Fizeau interferometers (FFI) [18,19]. Typical FI based sensing systems and application examples have been categorized into 13 types, according to the measured parameters, i.e., temperature [20,21], mechanical vibration [22,23], acoustic wave [22,24], ultrasound [25,26], voltage [27,28], magnetic field [29,30], pressure [20,31], strain [21,32], flow velocity [33,34], humidity [35,36], gas [37,38], liquid level [39,40], and the refractive index (RI) [41,42]. Li et al [20] proposed a cascaded-cavity FFPI to simultaneously sense air pressure and temperature.…”