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Optical Engineering

Optical phase conjugation in dyes embedded in polymer films
Author(s): K. P. B. Moosad; T. M. Abdul Rasheed; V. P. N. Nampoori
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Paper Abstract

Studies on low power optical phase conjugation (OPC) in three saturable dyes, viz., eosin, erythrosin B, and rose bengal, embedded in two polymer films, viz., gelatin and polyvinyl alcohol, are presented. Experiments are performed using the 514.5 nm line of an argon-ion laser. Saturation intensities are determined from the transmission versus intensity plots, and triplet lifetimes are estimated from the phosphorescence decay curves. OPC experiments are performed, and the variation of OPC reflectivity with intensity and absorption length is studied. Experimental results are compared with the theory of degenerate four-wave mixing in absorbing media proposed by R. L. Abrams and R. C. Lind [Opt. Lett. 2(4), 94 (1 978)]. There is fair agreement between the theory and the experimental observations. The limitations in using these films for cw OPC applications are briefly discussed.

Paper Details

Date Published: 1 January 1990
PDF: 5 pages
Opt. Eng. 29(1) doi: 10.1117/12.55557
Published in: Optical Engineering Volume 29, Issue 1
Show Author Affiliations
K. P. B. Moosad, Cochin Univ. of Science and Technology (India)
T. M. Abdul Rasheed, Cochin Univ. of Science and Technology (India)
V. P. N. Nampoori, Cochin Univ. of Science and Technology (India)

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