Recording Of Frequency-Difference Holograms In Lithium Niobate

S. Fries; J. Otten; K. H. Ringhofer; R. A. Rupp

doi:10.1117/12.962141

4 January 1990 Recording Of Frequency-Difference Holograms In Lithium Niobate

S. Fries, J. Otten, K. H. Ringhofer, R. A. Rupp

Proceedings Volume 1148, Nonlinear Optical Properties of Materials; (1990) https://doi.org/10.1117/12.962141
Event: 33rd Annual Technical Symposium, 1989, San Diego, United States

Abstract

The stabilization of volume phase holograms against erasure during read-out is of fundamental importance for the storage of volume phase holograms. There are several proposals to avoid the erasure of a hologram when reading it. In this paper we shall especially be concerned with the method of frequency-difference holograms. The basic idea is to record a hologram of the same object with two different frequencies and to read out with the difference of the frequencies. First we shall discuss light diffraction by frequency-difference holograms in terms of virtual holograms not physically present in the crystal. Since the efficiencies of the two-step processes involved turn out to be much too small compared to experimental data a refined mechanism which allows the formation of real frequency-difference holograms is outlined. The theory is based on off-Bragg terms in Maxwell's equations and is able to explain the order of magnitude of the experimental data.

Citation Download Citation

S. Fries, J. Otten, K. H. Ringhofer, and R. A. Rupp "Recording Of Frequency-Difference Holograms In Lithium Niobate", Proc. SPIE 1148, Nonlinear Optical Properties of Materials, (4 January 1990); https://doi.org/10.1117/12.962141

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