Temporal response of photorefractive two-beam coupling to slowly oscillating signals

David Statman; James C. Lombardi

doi:10.1117/12.340057

28 January 1999 Temporal response of photorefractive two-beam coupling to slowly oscillating signals

David Statman, James C. Lombardi

Proceedings Volume 3733, ICONO '98: Nonlinear Optical Phenomena and Coherent Optics in Information Technologies; (1999) https://doi.org/10.1117/12.340057
Event: ICONO '98: Laser Spectroscopy and Optical Diagnostics: Novel Trends and Applications in Laser Chemistry, Biophysics, and Biomedicine, 1998, Moscow, Russian Federation

Abstract

An important question relevant to any technology, which utilizes the photorefractive effect concerns the response time of the photorefractive medium. For example, it is well- established that barium titanate is very slow to respond to any changes to the pump or signal beam (on the order of 0.1 - 10 a), whereas bismuth silicon oxide (BSO) is faster (on the order of ms), and gallium arsenide (GaAs) is even faster (on the order of microsecond(s) or less). Thus, any technology in which fast response is desirable would preferably utilize GaAs. On the other hand, barium titanate has demonstrated usefulness for use in such technologies as the novelty filter, in which a slow response is preferable. It is, therefore, important that the temporal response of photorefractive materials in a two-beam coupling geometry be analyzed. We have investigated the temporal response of barium titanate to sinusoidal signals, and have characterized that response as a function of oscillation frequency.

Citation Download Citation

David Statman and James C. Lombardi "Temporal response of photorefractive two-beam coupling to slowly oscillating signals", Proc. SPIE 3733, ICONO '98: Nonlinear Optical Phenomena and Coherent Optics in Information Technologies, (28 January 1999); https://doi.org/10.1117/12.340057

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KEYWORDS

Modulation

Ferroelectric materials

Gallium arsenide

Beam splitters

Detection theory

Bismuth

Oxides

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