Abstract

We propose a novel high-efficiency, low-reflection, and fabrication-tolerant perfectly vertical grating coupler (PVGC) with a minimum feature size >200  nm to allow for fabrication using 193 nm deep-ultraviolet lithography. The structural parameters of PVGC were optimized by a genetic optimization algorithm. Simulations predicted the coupling efficiency to be 2.0  dB (63.0%) and the back reflections to be less than 20  dB in the wavelength range of 1532–1576 nm. The design was fabricated in a multi-project wafer run for silicon photonics, and a coupling efficiency of 2.7  dB (53.7%) with a 1 dB bandwidth of 33 nm is experimentally demonstrated. The measured back reflection is less than 16  dB over the C-band. The PVGC occupies a compact footprint of 30  μm×24  μm and can be interfaced with the multi-core fibers for future space-division-multiplexing networks.

© 2018 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Highly efficient and perfectly vertical chip-to-fiber dual-layer grating coupler

Ming Dai, Leilei Ma, Yelong Xu, Minghui Lu, Xiaoping Liu, and Yanfeng Chen
Opt. Express 23(2) 1691-1698 (2015)

Inverse design of near unity efficiency perfectly vertical grating couplers

Andrew Michaels and Eli Yablonovitch
Opt. Express 26(4) 4766-4779 (2018)

High-efficiency apodized bidirectional grating coupler for perfectly vertical coupling

Zanyun Zhang, Xia Chen, Qian Cheng, Ali Z. Khokhar, Xingzhao Yan, Beiju Huang, Hongda Chen, Hongwei Liu, Hongqiang Li, David J. Thomson, and Graham T. Reed
Opt. Lett. 44(20) 5081-5084 (2019)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (8)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (1)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription