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/µm. 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.
© 2001 Optical Society of America
Original Manuscript: October 12, 2000
Revised Manuscript: November 30, 2000
Published: March 20, 2001
Eric Hendrickx, David Van Steenwinckel, and André Persoons, "Tracking novelty filter at 780 nm based on a photorefractive polymer in a two-beam coupling geometry," Appl. Opt. 40, 1412-1416 (2001)