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Opt Lett. 2012 Jun 15;37(12):2307-9. doi: 10.1364/OL.37.002307.

Highly integrated 3×3 silicon thermo-optical switch using a single combined phase shifter for optical interconnects.

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  • 1Department of Information Science and Electronics Engineering, Zhejiang University, Hangzhou, 310027, China.


We report on an experimental 3×3 thermo-optical switch on silicon on insulator. By controlling a single combined phase shifter, light from any input waveguide can be directed to any output waveguide, showing a simple control method and highly integrated structure as compared to the conventional multiway optical switches. Furthermore, the proposed optical switch can be generalized to be a 1×N and N×N optical switch without an extra phase shifter. The switch is fabricated by complementary metal oxide semiconductor technology. By experiment, full 3×3 switching functionality is demonstrated at a wavelength of 1.55 μm, with an average cross talk of -11.1  dB and a power consumption of 97.5 mW.

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