Title: Adaptive interferometers for sensor applications

Authors: Igor A. Sokolov; Mikhail A. Bryushinin; Vladimir V. Kulikov; Sanowar H. Khan; Kenneth T.V. Grattan

Addresses: A.F. Ioffe Physical-Technical Institute, Russian Academy of Sciences, 194021 Polytekhnicheskaya 26, St. Petersburg, Russia ' A.F. Ioffe Physical-Technical Institute, Russian Academy of Sciences, 194021 Polytekhnicheskaya 26, St. Petersburg, Russia ' A.F. Ioffe Physical-Technical Institute, Russian Academy of Sciences, 194021 Polytekhnicheskaya 26, St. Petersburg, Russia ' Department of Electrical, Electronic and Information Engineering, City University, Northampton Square, London EC1V 0HB, UK ' Department of Electrical, Electronic and Information Engineering, City University, Northampton Square, London EC1V 0HB, UK

Abstract: We report on simple high-sensitivity interferometric techniques of detecting vibrations and present characteristics of laser vibrometer using Bi12SiO20 crystal. Adaptive interferometer enables efficient conversion of high-frequency phase modulation of speckle-like optical wave reflected from the vibrating object into an output signal with concomitant setting of optimal operation point of the interferometer and suppression of amplitude laser noise.

Keywords: adaptive interferometry; non-steady-state photo-EMF; photoelectromotive force; laser vibrometers; vibration detection; acoustic vibration; sensors.

DOI: 10.1504/IJLCPE.2013.058199

International Journal of Lifecycle Performance Engineering, 2013 Vol.1 No.3, pp.270 - 277

Available online: 10 Dec 2013 *

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