Self-pumped phase conjugation with nanosecond pulses in strontium barium niobate

We report the observation of self-pumped phase conjugation by means of internal reflection in a photorefractive medium produced by a series of intense nanosecond pulses. Nanosecond pulses from a YAG laser ranging in intensity from 9 x 10(4) to 9 x 10(5) W/cm(2) were used. The crystal was rhodium-dop...

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Bibliographic Details
Published in:Optics letters 1990-01, Vol.15 (1), p.12-14
Main Authors: Monson, B, Salamo, G J, Mott, A G, Miller, M J, Sharp, E J, Clark Iii, W W, Wood, G L, Neurgaonkar, R R
Format: Article
Language:English
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Summary:We report the observation of self-pumped phase conjugation by means of internal reflection in a photorefractive medium produced by a series of intense nanosecond pulses. Nanosecond pulses from a YAG laser ranging in intensity from 9 x 10(4) to 9 x 10(5) W/cm(2) were used. The crystal was rhodium-doped strontium barium niobate. The conjugate signal began with the first pulse, and the time to reach 63% of its equilibrium value scaled as I(-2). The equilibrium reflectivity was 29%. A similar cw experiment with the 514-nm line of an argon laser produced a response time that scaled as I(-1.1).
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.15.000012