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Authors: Jingjing Zhang ; Junbo Yang ; Wenjun Wu ; Honghui Jia and Shengli Chang

Affiliation: National University of Defense Technology, China

Keyword(s): Beam Splitter, Grating-Assisted Coupler, Coupled Mode Theory, Transfer Matrix Method.

Related Ontology Subjects/Areas/Topics: MEMS and Nanophotonics ; Optical Communications and Networking ; Optics ; Photonics ; Photonics, Optics and Laser Technology

Abstract: Abstract: Couplers are important parts in integrated optical circuit and high efficiency compact couplers are in great demand. We report on high-efficiency silicon-on-sapphire (SOS) grating couplers at wavelength of 2.7μm. A 75% coupling efficiency and 50nm etching depth bandwidth from a standard single-mode fiber to an SOS waveguide is obtained. A basic design principle of the grating coupler is presented, and some improved structures to enhance the coupling efficiency are proposed and estimated. The FDTD method is utilized to simulate and design the grating operated under TE polarization. With our optimization design, the coupling efficiency can be largely increased and beyond 80%. The gratings open the path to silicon photonic chips for the mid-infrared enabling new nonlinear optical functions as well as new spectroscopic lab on-a chip approaches.

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Paper citation in several formats:
Zhang, J.; Yang, J.; Wu, W.; Jia, H. and Chang, S. (2015). High Performance Silicon-on-Sapphire Subwavelength Grating Coupler for 2.7μm Wavelength. In Proceedings of the 3rd International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS; ISBN 978-989-758-092-5; ISSN 2184-4364, SciTePress, pages 73-77. DOI: 10.5220/0005333700730077

@conference{photoptics15,
author={Jingjing Zhang. and Junbo Yang. and Wenjun Wu. and Honghui Jia. and Shengli Chang.},
title={High Performance Silicon-on-Sapphire Subwavelength Grating Coupler for 2.7μm Wavelength},
booktitle={Proceedings of the 3rd International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS},
year={2015},
pages={73-77},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0005333700730077},
isbn={978-989-758-092-5},
issn={2184-4364},
}

TY - CONF

JO - Proceedings of the 3rd International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS
TI - High Performance Silicon-on-Sapphire Subwavelength Grating Coupler for 2.7μm Wavelength
SN - 978-989-758-092-5
IS - 2184-4364
AU - Zhang, J.
AU - Yang, J.
AU - Wu, W.
AU - Jia, H.
AU - Chang, S.
PY - 2015
SP - 73
EP - 77
DO - 10.5220/0005333700730077
PB - SciTePress

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