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

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

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.

infrared, Silicon photonics, spectroscopy
1041-1135
528-531
Nedeljković, Milos
b64e21c2-1b95-479d-a35c-3456dff8c796
Velasco, Aitor V.
b211e06c-bed5-4056-b5b1-253aafb8de5e
Khokhar, Ali Z.
2eedd1cc-8ac5-4f8e-be25-930bd3eae396
Delage, Andre
6b3ac66b-235d-42c9-a143-47bd89dc5d88
Cheben, Pavel
ab8ffd13-bc5c-44cb-88ed-605e3c347848
Mashanovich, Goran Z.
c806e262-af80-4836-b96f-319425060051
Nedeljković, Milos
b64e21c2-1b95-479d-a35c-3456dff8c796
Velasco, Aitor V.
b211e06c-bed5-4056-b5b1-253aafb8de5e
Khokhar, Ali Z.
2eedd1cc-8ac5-4f8e-be25-930bd3eae396
Delage, Andre
6b3ac66b-235d-42c9-a143-47bd89dc5d88
Cheben, Pavel
ab8ffd13-bc5c-44cb-88ed-605e3c347848
Mashanovich, Goran Z.
c806e262-af80-4836-b96f-319425060051

Nedeljković, Milos, Velasco, Aitor V., Khokhar, Ali Z., Delage, Andre, Cheben, Pavel and Mashanovich, Goran Z. (2016) Mid-infrared silicon-on-insulator Fourier-transform spectrometer chip. IEEE Photonics Technology Letters, 28 (4), 528-531. (doi:10.1109/LPT.2015.2496729).

Record type: Article

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.

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e-pub ahead of print date: 2 November 2015
Published date: 15 February 2016
Keywords: infrared, Silicon photonics, spectroscopy

Identifiers

Local EPrints ID: 420846
URI: https://eprints.soton.ac.uk/id/eprint/420846
ISSN: 1041-1135
PURE UUID: d4986fa1-943c-442c-98ec-8de959f4e4f0
ORCID for Milos Nedeljković: ORCID iD orcid.org/0000-0002-9170-7911

Catalogue record

Date deposited: 16 May 2018 16:30
Last modified: 03 Dec 2019 01:35

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