Fabry Perot Etalon with Polymer Cholesteric Liquid-Crystal Mirrors

Jay Stockley, Gary Sharp, Kristina Johnson

Published in Optical Society of America Optics Letters Vol. 24, Issue 1, pp. 55-57 (1999) •https://doi.org/10.1364/OL.24.000055

Abstract

We present what we believe to be the first implementation of a Fabry-Perot (FP) etalon using polymer cholesteric liquid-crystal mirrors. These polymer mirrors have each been fabricated onto a single substrate, which allows the FP cavity spacing to be only a few micrometers wide. For the experimental results presented, cavity lengths of 13.8 and 7.6 μm yield near-infrared free spectral ranges of 24.8 and 45.6 nm, respectively. The measured finesse of 14.31 is approaching the limitation imposed by the reflectivity of the mirrors. 

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