Mid-Wave Infrared Beam Steering Based On High-Efficiency Liquid Crystal Diffractive Waveplates

Abstract

We demonstrated two liquid crystal diffractive waveplates: one optimized for near-infrared (1.06 µm), and another for mid-wave infrared (MWIR, 3~5 µm). By employing a low loss liquid crystal mixture UCF-M3, whose absorption loss is below 2% in the 4~5 µm spectral region, the grating achieves over 98% diffraction efficiency in a broad MWIR range. To switch the grating, both active and passive driving methods can be considered. In our experiment, we used a polymer-stabilized twisted nematic cell as the polarization rotator for passive driving. The obtained rise time is 0.2 ms and decay time is 10 ms.

Publication Date

9-18-2017

Publication Title

Optics Express

Volume

25

Issue

19

Number of Pages

22404-22410

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1364/OE.25.022404

Socpus ID

85029905681 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85029905681

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