Abstract.
‘Spontaneous’ noncolinear frequency doubling (SNCFD) is a type of optical second-harmonic generation (SHG) that uses scattered light to provide additional fundamental beams in order to accomplish noncolinear phase matching. Based on a novel algorithm for the automated evaluation of the resulting ring patterns, we present an easy-to-apply, sensitive, and non-destructive method for the characterization of photorefractive materials, yielding two-dimensional spatial resolution. As applications of the technique, examples for the characterization of lithium niobate crystals are presented.
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Received: 30 October 1998 / Revised version: 17 December 1998 / Published online: 7 April 1999
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Kasemir, KU., Betzler, K. Characterization of photorefractive materials by spontaneous noncolinear frequency doubling. Appl Phys B 68, 763–766 (1999). https://doi.org/10.1007/s003400050702
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DOI: https://doi.org/10.1007/s003400050702