Narrowband multispectral liquid crystal tunable filter

Opt Lett. 2016 May 1;41(9):1957-60. doi: 10.1364/OL.41.001957.

Abstract

Multispectral tunable filters with high performance are desirable components in various biomedical and industrial applications. In this Letter, we present a new narrowband multispectral tunable filter with high throughput over a wide dynamic range. It is composed from a wideband large dynamic range liquid crystal tunable filter combined with a multiple narrowbands spectral filter made of two stacks of photonic crystals and cavity layer in between. The filter tunes between nine spectral bands covering the range 450-1000 nm with bandwidth <10 nm and throughput >80%.