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Title: Microring resonator-assisted Fourier transform spectrometer with enhanced resolution and large bandwidth in single chip solution
Authors: Song, J. F.
Kwong, D. L.
Zheng, Shao Nan
Zou, Jianping
Cai, Hong
Chin, Lip Ket
Liu, Patricia Yang
Lin, Zhi Ping
Liu, Ai Qun
Keywords: Photonic Devices
Integrated Optics
Engineering::Electrical and electronic engineering
Issue Date: 2019
Source: Zheng, S. N., Zou, J., Cai, H., Song, J. F., Chin, L. K., Liu, P. Y., . . . Liu, A. Q. (2019). Microring resonator-assisted Fourier transform spectrometer with enhanced resolution and large bandwidth in single chip solution. Nature Communications, 10(1), 2349-. doi:10.1038/s41467-019-10282-1
Series/Report no.: Nature Communications
Abstract: Single chip integrated spectrometers are critical to bring chemical and biological sensing, spectroscopy, and spectral imaging into robust, compact and cost-effective devices. Existing on-chip spectrometer approaches fail to realize both high resolution and broad band. Here we demonstrate a microring resonator-assisted Fourier-transform (RAFT) spectrometer, which is realized using a tunable Mach-Zehnder interferometer (MZI) cascaded with a tunable microring resonator (MRR) to enhance the resolution, integrated with a photodetector onto a single chip. The MRR boosts the resolution to 0.47 nm, far beyond the Rayleigh criterion of the tunable MZI-based Fourier-transform spectrometer. A single channel achieves large bandwidth of ~ 90 nm with low power consumption (35 mW for MRR and 1.8 W for MZI) at the expense of degraded signal-to-noise ratio due to time-multiplexing. Integrating a RAFT element array is envisaged to dramatically extend the bandwidth for spectral analytical applications such as chemical and biological sensing, spectroscopy, image spectrometry, etc.
DOI: 10.1038/s41467-019-10282-1
Schools: School of Electrical and Electronic Engineering 
Rights: © 2019 The Author(s). Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
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