Optical thresholder consisting of two cascaded Mach-Zehnder interferometers with nonlinear microring resonators

Kishikawa, Hiroki and Kondo, Tadashi and Goto, Nobuo and Talabattula, Srinivas (2017) Optical thresholder consisting of two cascaded Mach-Zehnder interferometers with nonlinear microring resonators. In: OPTICAL ENGINEERING, 56 (8).

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Abstract

We propose an optical thresholder having a flat power transfer function both in low-and high-level outputs. The optical thresholder consists of two cascaded Mach-Zehnder interferometers (MZIs) with a nonlinear microring resonator in each MZI. We theoretically analyze the power transfer function and the response speed of the thresholder made of silicon waveguides. A thresholder having the threshold of 7 mW with a response speed of 13 GHz was obtained with a ring radius of 5 mu m. The response speed can be increased to 23.7 GHz by adjusting device parameters with the same ring radius at the cost of increased threshold of 22 mW. Further increased response frequency can be realized by reducing the ring radius. A thresholder with a ring radius of 2 mu m shows the response frequency of 40.5 GHz. (C) 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)

Item Type:	Journal Article
Publication:	OPTICAL ENGINEERING
Additional Information:	Copy right for this article belongs to the SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS, 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering Division of Electrical Sciences > Electrical Communication Engineering > Electrical Communication Engineering - Technical Reports
Date Deposited:	13 Oct 2017 04:51
Last Modified:	13 Oct 2017 04:51
URI:	http://eprints.iisc.ac.in/id/eprint/58030

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