Sagnac-interferometer-based characterization of spatial light modulators.
A method for characterizing the phase response of spatial light modulators (SLMs) by using a Sagnac interferometer is proposed and demonstrated. The method represents an improvement over conventional diffraction-based or interferometric techniques by providing a simple and accurate phase measurement while taking advantage of the inherent phase stability of a Sagnac interferometer. As a demonstration, the phase response of a commercial liquid crystal on a silicon SLM is characterized and then linearized by using a programmable lookup table. The transverse phase profile over the SLM surface is also measured.
Tay
Jian Wei
JW
Jack Dodd Centre for Quantum Science, Physics Department, Otago University, P.O. Box 56, Dunedin, New Zealand.
Taylor
Michael A
MA
Bowen
Warwick P
WP