Physics – Optics
Scientific paper
2010-09-09
Optics Express, Vol. 18, Issue 22, pp. 23095-23103 (2010)
Physics
Optics
10 pages, 6 figures, submitted to Optics Express
Scientific paper
10.1364/OE.18.023095
A fast multichannel Stokes/Mueller polarimeter with no mechanically moving parts has been designed to have close to optimal performance from 430-2000 nm by applying a genetic algorithm. Stokes (Mueller) polarimeters are characterized by their ability to analyze the full Stokes (Mueller) vector (matrix) of the incident light. This ability is characterized by the condition number, $\kappa$, which directly influences the measurement noise in polarimetric measurements. Due to the spectral dependence of the retardance in birefringent materials, it is not trivial to design a polarimeter using dispersive components. We present here both a method to do this optimization using a genetic algorithm, as well as simulation results. Our results include fast, broad-band polarimeter designs for spectrographic use, based on 2 and 3 Ferroelectric Liquid Crystals, whose material properties are taken from measured values. The results promise to reduce the measurement noise significantly over previous designs, up to a factor of 4.5 for a Mueller polarimeter, in addition to extending the spectral range.
Ellingsen Pål Gunnar
Kildemo Morten
Letnes Paul Anton
Nerbø Ingar Stian
Sandvik Aas Lars Martin
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