Mid-infrared silicon-on-insulator Fourier-transform spectrometer chip

From National Research Council Canada

DOI	Resolve DOI: https://doi.org/10.1109/LPT.2015.2496729
Author	Search for: Nedeljkovic, Milos; Search for: Velasco, Aitor V.; Search for: Khokhar, Ali Z.; Search for: Delage, Andre¹ ; Search for: Cheben, Pavel¹ ; Search for: Mashanovich, Goran Z.
Name affiliation	National Research Council Canada. Information and Communication Technologies
Format	Text
Type	Article
Journal title	IEEE Photonics Technology Letters
ISSN	1041-1135 1941-0174
Volume	28
Issue	4
Pages	528–531
Subject	Silicon photonics; Spectroscopy; Infrared
Abstract	Mid-infrared absorption spectroscopy is highly relevant for a wide range of sensing applications. In this letter, we demonstrate a Fourier-transform spectrometer chip based on the principle of spatial heterodyning implemented in the silicon-on-insulator waveguide platform, and operating near 3.75-μm wavelength. The spectrometer comprises a waveguide splitting tree feeding to an array of 42 Mach-Zehnder interferometers with linearly increasing optical path length differences. A spectral retrieval algorithm based on calibration matrices is applied to the stationary output pattern of the array, compensating for any phase and amplitude errors arising from fabrication imperfections. A spectral resolution below 3 nm is experimentally demonstrated.
Publication date	2015-11-02
Publisher	IEEE
Terms of use	Permission is granted to temporarily download one copy of the materials for personal, noncommercial transitory viewing only. NRC Publications Archive - Copyright and terms of use
Language	English
Peer reviewed	Yes
NPARC number	23000044
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Record identifier	e1427247-f7f5-4464-93f8-6f578cfca0c8
Record created	2016-05-31
Record modified	2016-05-31

Date modified:: 2019-03-20

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