Abstract
A Ti: LiNbO3 waveguide device that combines the beam-splitter and polariser functions into a single component is presented. This three-waveguide device is designed to split the TM mode equally to the two outer output ports while guiding the TE mode out of the centre guide. The device is low-loss, provides equal splitting and passively delivers–20 dB of polarisation extinction. Electro-optical tuning would improve this value.
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