Tracking novelty filter at 780 nm based on a photorefractive polymer in a two-beam coupling geometry

E Hendrickx; D Van Steenwinckel; A Persoons

doi:10.1364/ao.40.001412

Tracking novelty filter at 780 nm based on a photorefractive polymer in a two-beam coupling geometry

Appl Opt. 2001 Mar 20;40(9):1412-6. doi: 10.1364/ao.40.001412.

Authors

E Hendrickx¹, D Van Steenwinckel, A Persoons

Affiliation

¹ Laboratory of Chemical and Biological Dynamics, University of Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium. eric.hendrickx@fys.kuleuven.ac.be

PMID: 18357130
DOI: 10.1364/ao.40.001412

Abstract

We have constructed an all-optical tracking novelty filter based on the dynamic holographic properties of an efficient and fast infrared-sensitive photorefractive polymer. The photorefractive polymer was used in a two-beam coupling geometry. The polymer had a gain coefficient of 175 cm(-1) at a wavelength of 780 nm and an applied field of 72 V/microm. In contrast to what has been observed in photorefractive crystals, the gain coefficient and the filter contrast are largely independent of the writing beam's intensity ratio. We show images of a swinging pendulum observed through the novelty filter.