Optical Lock-in Vibration Detection Using Photorefractive Four-Wave Mixing
Many important applications for photorefractive crystals (PRCs) have been found recently by various investigators [1–3]. These applications range from volumetric information storage in optical computing to adaptive, remote detection of ultrasonic vibration in optical nondestructive evaluation . In this paper, we propose the use of PRCs for lock-in detection of continuously vibrating structures.
Unable to display preview. Download preview PDF.
- 3.P. Yeh, Introduction to Photorefractive Nonlinear Optics, John Wiley & Sons, Inc., (1993).Google Scholar
- 4.A. Blouin and Jean-Pierre Monchalin, “Detection of ultrasonic motion of a scattering surface by two-wave mixing in a photorefractive GaAs crystal”, Applied Physics Letters. Vol. 65, No. 8, (1994).Google Scholar
- 7.H. Kogelnik, “Coupled wave theory for thick hologram gratings”, The Bell System Technical Journal”. Vol. 48, pp. 2909–2947, (November 1969).Google Scholar
- 8.J.W. Wagner, “Optical detection of ultrasound,” Ultrasonic Measurement Methods, Eds. R.N. Thurston and A.D. Pierce, Academic Press, Ch. 5, (1990).Google Scholar