Demonstration of a compressive-sensing Fourier-transform on-chip spectrometer

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DOIResolve DOI: http://doi.org/10.1364/OL.42.001440
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TypeArticle
Journal titleOptics Letters
ISSN0146-9592
1539-4794
Volume42
Issue7
Pages14401443
AbstractWe demonstrate compressive-sensing (CS) spectroscopy in a planar-waveguide Fourier-transform spectrometer (FTS) device. The spectrometer is implemented as an array of Mach–Zehnder interferometers (MZIs) integrated on a photonic chip. The signal from a set of MZIs is composed of an undersampled discrete Fourier interferogram, which we invert using l1-norm minimization to retrieve a sparse input spectrum. To implement this technique, we use a subwavelength-engineered spatial heterodyne FTS on a chip composed of 32 independent MZIs. We demonstrate the retrieval of three sparse input signals by collecting data from restricted sets (8 and 14) of MZIs and applying common CS reconstruction techniques to this data. We show that this retrieval maintains the full resolution and bandwidth of the original device, despite a sampling factor as low as one-fourth of a conventional (non-compressive) design.
Publication date
PublisherOptical Society of America
LanguageEnglish
AffiliationMedical Devices; National Research Council Canada
Peer reviewedYes
NPARC number23002314
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Record identifierde832a43-ce96-4cf5-94c6-2a149dd30bb7
Record created2017-10-13
Record modified2017-10-13
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