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Proceedings Paper

Real-time interferometry by optical phase conjugation in dye-doped film
Author(s): Hirofumi Fujiwara
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Paper Abstract

Dyes fixed in polymer matrices can generate a phase-conjugate (PC) wave through several different mechanisms such as saturable absorption, trans-cis photoisomerism and photochemical irreversible changes in absorption coefficient and/or refractive index. PC waves generated in dye-doped films have optical properties which are not found in photorefractive materials, and their proper use allows one to perform three types of real-time PC interferometry. Real-time PC interferometries for (1) detecting the phase difference between two objects. (2) subtraction in amplitude of two objects, and (3) detecting a moving object in a scene were demonstrated in a standard backward degenerate four-wave mixing (BDFWM) arrangement. An erythrosin-B- doped polyvinyl alcohol (PVA) film was used in (1) and (2), and a methyl- orange-doped PVA film was used in (3).

Paper Details

Date Published: 1 September 1991
PDF: 8 pages
Proc. SPIE 1507, Holographic Optics III: Principles and Applications, (1 September 1991); doi: 10.1117/12.47071
Show Author Affiliations
Hirofumi Fujiwara, Muroran Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 1507:
Holographic Optics III: Principles and Applications
G. Michael Morris, Editor(s)

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