| DOI | Resolve DOI: https://doi.org/10.1109/ICTON.2017.8024928 |
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| Author | Search for: Cheben, C.; Search for: Podmore, H.; Search for: Herrero, A.; Search for: Velasco, A. V.; Search for: Schmid, J. H.1; Search for: Scott, A.; Search for: Vachon, M.1; Search for: Lee, R.; Search for: Calvo, M. L.; Search for: Xu, D. X.1; Search for: Janz, S.1; Search for: Corredera, P. |
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| Affiliation | - National Research Council of Canada. Information and Communication Technologies
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| Format | Text, Article |
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| Conference | 19th International Conference on Transparent Optical Networks (ICTON), 2-6 July 2017, Girona, Spain, Spain |
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| Abstract | We report our advances in development of on-chip Fourier-transform spectrometers. Specifically, we present applications of subwavelength engineered waveguides in a new type of a compressive-sensing Fourier-transform spatial heterodyne spectrometer chip. The spectrometer is implemented as an array of Mach-Zehnder interferometers (MZIs) integrated on a photonic chip, in a spatial heterodyne configuration. The signal from a set of MZIs comprises an undersampled discrete Fourier interferogram, which is inverted using L1-norm minimization technique to retrieve a sparse input spectrum. To implement this technique we use a subwavelength-engineered Fourier-transform spectrometer on a chip comprising 32 independent MZIs. We successfully demonstrate the retrieval of sparse input signals by collecting data from restricted sets (8 and 14) of MZIs and applying common compressive-sensing 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 1/4th of a conventional (non-compressive) design |
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| Publication date | 2017-07 |
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| Publisher | IEEE |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 23002262 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 9e67e83b-9e82-4f3d-aa73-a79ee6d2c533 |
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| Record created | 2017-09-15 |
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| Record modified | 2020-03-16 |
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