Bandwidth-adaptable silicon photonic differentiator employing a slow light effect

Siqi Yan; Ziwei Cheng; Lars Hagedorn Frandsen; Yunhong Ding; Feng Zhou; Jianji Dong; Xinliang Zhang

doi:10.1364/OL.42.001596

Bandwidth-adaptable silicon photonic differentiator employing a slow light effect

Siqi Yan, Ziwei Cheng, Lars Hagedorn Frandsen, Yunhong Ding, Feng Zhou, Jianji Dong, Xinliang Zhang

Centre of Excellence for Silicon Photonics for Optical Communications

Huazhong University of Science and Technology

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

A photonic differentiator (DIFF) plays a crucial role in photonic circuits. Despite the fact that a DIFF having a tera-hertz bandwidth has been reported, the practical bandwidth is limited to being a bandpass response. In this Letter, we propose the concept of a bandwidth-adaptable DIFF, which exploits the slow light effect in a photonic crystal waveguide (PhCW) to overcome the inherent bandwidth limitation of current photonic DIFFs. We fabricated a PhCW Mach-Zehnder interferometer (PhCW-MZI) on the silicon-onisolator material platform to validate our concept. Input Gaussian pulses with full width to half-maximums (FWHMs) ranging from 2.7 to 81.4 ps are accurately differentiated using our PhCW-MZI. Our all-passive scheme circumvents the bandwidth bottlenecks of previously reported photonic DIFFs and can greatly broaden the application area of photonic DIFFs. (C) 2017 Optical Society of America

Original language	English
Journal	Optics Letters
Volume	42
Issue number	8
Pages (from-to)	1596-1599
ISSN	0146-9592
DOIs	https://doi.org/10.1364/OL.42.001596
Publication status	Published - 2017

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title = "Bandwidth-adaptable silicon photonic differentiator employing a slow light effect",

abstract = "A photonic differentiator (DIFF) plays a crucial role in photonic circuits. Despite the fact that a DIFF having a tera-hertz bandwidth has been reported, the practical bandwidth is limited to being a bandpass response. In this Letter, we propose the concept of a bandwidth-adaptable DIFF, which exploits the slow light effect in a photonic crystal waveguide (PhCW) to overcome the inherent bandwidth limitation of current photonic DIFFs. We fabricated a PhCW Mach-Zehnder interferometer (PhCW-MZI) on the silicon-onisolator material platform to validate our concept. Input Gaussian pulses with full width to half-maximums (FWHMs) ranging from 2.7 to 81.4 ps are accurately differentiated using our PhCW-MZI. Our all-passive scheme circumvents the bandwidth bottlenecks of previously reported photonic DIFFs and can greatly broaden the application area of photonic DIFFs. (C) 2017 Optical Society of America",

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T1 - Bandwidth-adaptable silicon photonic differentiator employing a slow light effect

AU - Yan, Siqi

AU - Cheng, Ziwei

AU - Frandsen, Lars Hagedorn

AU - Ding, Yunhong

AU - Zhou, Feng

AU - Dong, Jianji

AU - Zhang, Xinliang

PY - 2017

Y1 - 2017

N2 - A photonic differentiator (DIFF) plays a crucial role in photonic circuits. Despite the fact that a DIFF having a tera-hertz bandwidth has been reported, the practical bandwidth is limited to being a bandpass response. In this Letter, we propose the concept of a bandwidth-adaptable DIFF, which exploits the slow light effect in a photonic crystal waveguide (PhCW) to overcome the inherent bandwidth limitation of current photonic DIFFs. We fabricated a PhCW Mach-Zehnder interferometer (PhCW-MZI) on the silicon-onisolator material platform to validate our concept. Input Gaussian pulses with full width to half-maximums (FWHMs) ranging from 2.7 to 81.4 ps are accurately differentiated using our PhCW-MZI. Our all-passive scheme circumvents the bandwidth bottlenecks of previously reported photonic DIFFs and can greatly broaden the application area of photonic DIFFs. (C) 2017 Optical Society of America

AB - A photonic differentiator (DIFF) plays a crucial role in photonic circuits. Despite the fact that a DIFF having a tera-hertz bandwidth has been reported, the practical bandwidth is limited to being a bandpass response. In this Letter, we propose the concept of a bandwidth-adaptable DIFF, which exploits the slow light effect in a photonic crystal waveguide (PhCW) to overcome the inherent bandwidth limitation of current photonic DIFFs. We fabricated a PhCW Mach-Zehnder interferometer (PhCW-MZI) on the silicon-onisolator material platform to validate our concept. Input Gaussian pulses with full width to half-maximums (FWHMs) ranging from 2.7 to 81.4 ps are accurately differentiated using our PhCW-MZI. Our all-passive scheme circumvents the bandwidth bottlenecks of previously reported photonic DIFFs and can greatly broaden the application area of photonic DIFFs. (C) 2017 Optical Society of America

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ER -

Bandwidth-adaptable silicon photonic differentiator employing a slow light effect

Abstract

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