1 May 2015 Electro-optic 1x2 switch based on proton-exchanged channel waveguides in LiNbO3
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Integrated-optic 1×2 switch utilizing electro-optically controllable Y-fed directional coupler has been fabricated in LiNbO3 substrates with proton exchange technology. Such an integrated-optic switch has the newly designed Y-branching power divider allowing for high switching contrast at the both optical output ports and low driving voltage. To obtain an acceptable value of the interaction-length-to-coupling-length ratio, the novel trimming procedure is proposed. A rather high switching contrast ≥ 23 dB (power extinction ratio) at any output port and 2.5 dB insertion losses were obtained for a device with the 9 mm electrodes length.
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S. M. Kostritskii, Yu. N. Korkishko, V. A. Fedorov, "Electro-optic 1x2 switch based on proton-exchanged channel waveguides in LiNbO3", Proc. SPIE 9516, Integrated Optics: Physics and Simulations II, 951612 (1 May 2015); doi: 10.1117/12.2178370; https://doi.org/10.1117/12.2178370


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