Compact and low loss 90° optical hybrid on a silicon-on-insulator platform | Zendy

Hang Guan | Zendy; Yangjin Ma | Zendy; Ruizhi Shi | Zendy; Xiaoliang Zhu | Zendy; Rick Younce | Zendy; Yaojia Chen | Zendy; José E. Román | Zendy; Noam Ophir | Zendy; Yang Liu | Zendy; Ran Ding | Zendy; Thomas Baehr-Jones | Zendy; Keren Bergman | Zendy; Michael Hochberg | Zendy

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Compact and low loss 90° optical hybrid on a silicon-on-insulator platform

Author(s) -

Hang Guan,

Yangjin Ma,

Ruizhi Shi,

Xiaoliang Zhu,

Rick Younce,

Yaojia Chen,

José E. Román,

Noam Ophir,

Yang Liu,

Ran Ding,

Thomas Baehr-Jones,

Keren Bergman,

Michael Hochberg

Publication year - 2017

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.25.028957

Subject(s) - silicon on insulator , optics , wafer , materials science , insertion loss , optoelectronics , silicon , physics

We present a compact and low loss 90° optical hybrid on a silicon-on-insulator (SOI) platform for coherent receiving systems. Our 90° optical hybrid uses a novel topology, comprising one Y-junction and three 2x2 multimode interference (MMI) couplers. The geometry of the 90° optical hybrid is fully optimized using particle swarm optimization (PSO). The fabricated 90° optical hybrid has a compact footprint of 21.6 μm x 27.9 μm, with an insertion loss less than 0.5 dB, a common mode rejection ratio (CMRR) larger than 30 dB, and phase error smaller than 3° in the C-band across 22 reticles on one wafer. The measured phase error (< 3°) in a packaged coherent receiver further confirms the excellent performance of the 90° optical hybrid.

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