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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 33,
  • Issue 4,
  • pp. 857-864
  • (2015)

4 × 4 Nonblocking Silicon Thermo-Optic Switches Based on Multimode Interferometers

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Abstract

We experimentally demonstrate a silicon 4 × 4 nonblocking thermo-optic (TO) switch using a generalized Mach–Zehnder interferometer constructed on multimode interferometers. All the 24 switching states for nonblocking switching are characterized. The device fabricated using CMOS technologies has a footprint of 2.8 × 0.65 mm2. The measured average on-chip insertion loss is 9 ± 2 dB and the crosstalk for all switching states is better than –12 dB. The average TO switching power consumption is 109 mW. The switching functionality is verified by transmission of a 40-Gb/s quadrature phase-shift keying optical signal.

© 2014 IEEE

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