Abstract
This paper describes a simple, optically passive detection scheme for in-line Fabry-Perot etalon (ILFE) sensors that is also useful for intrinsic Fabry-Perot (IFP) and extrinsic Fabry-Perot interferometer (EFPI) sensors. This detection scheme is based on two spectrally shiffed Bragg wavelengths from in-line Bragg gratings to produce two quadrature phase shifted signals from the spectral transfer function of the Fabry-Perot sensor. Using the amplified spontaneous emission (ASE) from an erbium-doped fiber amplifier (EDFA) as a low-coherence, high-power broad-band source, the passive detection technique is used to demonstrate the use of ILFE sensors in high strain rate dynamics studies. This study is designed to characterize the high strain rate response of optical fiber sensors and test their ability to monitor dynamic strain changes resulting from one-dimensional stress wave propagation.
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References
Beheim, G., “Remote Displacement Measurement Using a Passive Interferometer with a Fiber-optic Link,” Appl. Opt., 2335–2340, (1985).
Dally, J.W., Riley, W.F., andMcconnell, K.g., Instrumentation for Engineering Measurements, John Wiley, New York (1984).
David, E.H., Jens, F., and Dana, D.D., “Dynamics of a Polymer Shock Optical Microgague Studied by Picosecond Coherent Raman Spectroscopy,” Appl. Phys. Let., 3051–3053 (1994).
Huntley, J.M. and Field, J.E., “High Resolution Moiré Photography: Application to Dynamic Stress Analysis, Opt. Eng., 926–933 (1989).
Jenkins, F.A. andWhite, H.E., Fundamentals of Optics, McGraw-Hill, New York (1953).
Kersey, A.D. and Berkoff, T.A., “Dual Wavelength Fiber Interferometer with Wavelength Selection via Fiber Bragg Grating Elements,” Electronics Lett., 1215–1216 (1992).
Koo, K.P., Tveten, A.B., and Dandridge, A., “Passive Stabilization Scheme for Fiber Interferometers Using (3 x 3) Fiber Directional Couplers,” Appl. Phys. Lett., 616–618 (1982).
Lo, Y.L and Sirkis, J.S., “Passive Signal Processing of Fabry-Perot Sensor Using White-light Interferometries for Dynamic Studies,” J. Lightwave Tech. (1995).
Lo, Y.L. and Sirkis, J.S., “Passive Demodulation Techniques for Optical Fiber Sensors,” Exp. Techniques, 23–27 (1995).
Lo, Y.L. and Sirkis, J.S., “Strain-rate Sensor Based on In-fiber Doppler Velocimetry,” J. Lightwave Tech., (1995).
Meltz, G. andDunphy, J.R., “Optical Fiber Stress Wave Sensor,”SPIE, Fiber Optic and Laser Sensors V,838,69–77 (1987).
Murphy, K.A., Gunther, M.F., Vengsarkar, A.M., and Claus, R.O., “Quadrature Phase-shifted Extrinsic Fabry-Perot Optical Fiber Sensors,” Opt. Lett., 273–275 (1991).
Singh, R. and Shukla, A., “Fiber-optic Sensors for Dynamic Wave Propagation Studies,” Proc. SEM Spring Conf., Baltimore, MD, 514–519 (1994).
Vesser, L.R., George, M.J., Menikoff, R., andPapatheofanis, B., “Sensing of High Pressure by Shock Heating Quartz Optical Fibers,”SPIE, Fiber Optic and Laser Sensors V,838,60–68 (1987).
Zhou, C., Shukla, A., Letcher, S., Shingh, R., andSienkiewicz, F., “On the Use of Microbend Fiber-optic Sensor in Material Characterization,”SPIE, Fiber Optic Physical Sensors in Manufacturing and Transportation,2072,214–223 (1993).
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Lo, Y.L., Sirkis, J.S. Fabry-Perot sensors for dynamic studies using spectrally based passive quadrature signal processing. Experimental Mechanics 37, 119–125 (1997). https://doi.org/10.1007/BF02317846
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DOI: https://doi.org/10.1007/BF02317846