Liquid Crystal Clad Polymer Waveguide based Electro-Optic Attenuator

Abstract

In the proposed work, we fabricated a liquid crystal cladding waveguide-based variable optical attenuator. The waveguide is realized using a negative photoresist (AZ15nXT) core on indium tin oxide (ITO) coated glass substrates. The device is characterized at two wavelengths, 633 nm and 520 nm. The transverse magnetic (TM) modes get attenuated on the application of the electric field across the waveguide. The maximum extinction ratio achieved is 6.85 dB.