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Proceedings Paper

Si-wire grating couplers for integrated optical transceivers based on single-mode fiber connection
Author(s): Yohei Sobu; Seok–Hwan Jeong; Shigeaki Sekiguchi; Yu Tanaka; Ken Morito
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Paper Abstract

Recently, grating couplers (GCs) have been extensively reported as a promising device for optical coupling between Siwire waveguides and standard single mode optical fibers. In this paper, we report the feasibility study of Si-wire type GCs fabricated by the 248-nm KrF lithography process on a 200-mm silicon-on-insulator (SOI) wafer with a 220-nmthick Si layer. We report a 1D-GC for a transmitter that operates only with TE mode and a 2D-GC for a receiver that splits arbitrary polarization from a single mode fiber operating at a wavelength of 1550 nm. We investigated the fundamental feasibility with the simple design. Especially, the wafer uniformity in inter-dies of 1D and 2D-GC is mainly examined on a 200-mm SOI wafer. Additionally, we experimentally clarify the fundamental characteristics of the 1DGC from the viewpoint of an insertion loss and a 1-dB fiber misalignment tolerance. As for the 2D-GC, in addition to the same aspects with the 1D-GC, an optical crosstalk and a polarization dependent loss will also be discussed around 1550 nm wavelength. Also, the center wavelength against a grating period of the 1D-GC and a circular hole diameter of the 2D-GC will be characterized.

Paper Details

Date Published: 27 February 2015
PDF: 8 pages
Proc. SPIE 9367, Silicon Photonics X, 936710 (27 February 2015); doi: 10.1117/12.2078699
Show Author Affiliations
Yohei Sobu, Fujitsu Labs., Ltd. (Japan)
Photonics Electronics Technology Research Association (Japan)
Seok–Hwan Jeong, Photonics Electronics Technology Research Association (Japan)
Shigeaki Sekiguchi, Fujitsu Labs., Ltd. (Japan)
Photonics Electronics Technology Research Association (Japan)
Yu Tanaka, Photonics Electronics Technology Research Association (Japan)
Ken Morito, Fujitsu Labs., Ltd. (Japan)
Photonics Electronics Technology Research Association (Japan)

Published in SPIE Proceedings Vol. 9367:
Silicon Photonics X
Graham T. Reed; Michael R. Watts, Editor(s)

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