Low-loss and high stability standard single mode fiber edge couplers for silicon photonics

Bowen Li; Bojin Pan; Jiyao Yu; Yu Li; Guowei Cao; Junbo Feng

doi:10.1117/12.2652019

23 January 2023 Low-loss and high stability standard single mode fiber edge couplers for silicon photonics

Bowen Li, Bojin Pan, Jiyao Yu, Yu Li, Guowei Cao, Junbo Feng

Proceedings Volume 12556, AOPC 2022: Optoelectronics and Nanophotonics; 125561A (2023) https://doi.org/10.1117/12.2652019
Event: Applied Optics and Photonics China 2022 (AOPC2022), 2022, Beijing, China

Abstract

Efficient optical coupling between standard single mode fibers and nanophotonic waveguides has been recognized as a major practical challenge since the early years of photonics. In this work, a low-loss and wide band edge coupler based on subwavelength gratings (SWG) for standard single mode fibers is proposed and demonstrated on 220 nm SOI platform. The edge coupler has a minimum feature size of 130 nm and a 630-m length, which was fabricated in CUMEC’s 200 mm CMOS production facilities. The best coupling losses are 1.60 and 1.95 dB for TE and TMin1500-1600 nm wavelength range, respectively, achieving a minimum PDL of 0.2 dB at 1500 nm. Moreover, by taking advantage of SiN-on-Si integrated process and wafer bonding process, the edge coupler exhibits high process and package reliability, making it attractive for the commercial application.

Citation Download Citation

Bowen Li, Bojin Pan, Jiyao Yu, Yu Li, Guowei Cao, and Junbo Feng "Low-loss and high stability standard single mode fiber edge couplers for silicon photonics", Proc. SPIE 12556, AOPC 2022: Optoelectronics and Nanophotonics, 125561A (23 January 2023); https://doi.org/10.1117/12.2652019

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