Ultralow-crosstalk, strictly non-blocking microring-based optical switch
Cheng, Qixiang; Dai, Liang Yuan; Abrams, Nathan C.; Hung, Yu-Han; Morrissey, Padraic E.; Glick, Madeleine; O'Brien, Peter A.; Bergman, Keren
Date:
2019-01-16
Copyright:
© 2019 Chinese Laser Press. Published by Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.
Full text restriction information:
Access to this article is restricted until 12 months after publication by request of the publisher.
Restriction lift date:
2020-01-16
Citation:
Cheng, Q., Dai, L. Y., Abrams, N. C., Hung, Y.-H., Morrissey, P. E., Glick, M., O’Brien, P. and Bergman, K. (2019) 'Ultralow-crosstalk, strictly non-blocking microring-based optical switch', Photonics Research, 7(2), pp. 155-161. doi: 10.1364/PRJ.7.000155
Abstract:
We report on the first monolithically integrated microring-based optical switch in the switch-and-select architecture. The switch fabric delivers strictly non-blocking connectivity while completely canceling the first-order crosstalk. The 4×4 switching circuit consists of eight silicon microring-based spatial (de-)multiplexers interconnected by a Si/SiN dual-layer crossing-free central shuffle. Analysis of the on-state and off-state power transfer functions reveals the extinction ratios of individual ring resonators exceeding 25 dB, leading to switch crosstalk suppression of up to over 50 dB in the switch-and-select topology. Optical paths are assessed, showing losses as low as 0.1 dB per off-resonance ring and 0.5 dB per on-resonance ring. Photonic switching is actuated with integrated micro-heaters to give an ∼24 GHz passband. The fully packaged device is flip-chip bonded onto a printed circuit board breakout board with a UV-curved fiber array.
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