High-resolution Fourier-transform spectrometer chip with microphotonic silicon spiral waveguides



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Villafranca Velasco, Aitor and Cheben, Pavel and Bock, Przemek J. and Schmid, Jens H. and Delâge, André and Lapointe, Jean and Janz, Siegfried and Calvo Padilla, María Luisa and Xu, Dan-Xia and Florjańczyk, Mirosław and Vachon, Martin (2013) High-resolution Fourier-transform spectrometer chip with microphotonic silicon spiral waveguides. Optics Letters, 38 (5). pp. 706-708. ISSN 0146-9592

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Official URL: http://dx.doi.org/10.1364/OL.38.000706


We report a stationary Fourier-transform spectrometer chip implemented in silicon microphotonic waveguides. The device comprises an array of 32 Mach-Zehnder interferometers (MZIs) with linearly increasing optical path delays between the MZI arms across the array. The optical delays are achieved by using Si-wire waveguides arranged in tightly coiled spirals with a compact device footprint of 12 mm(2). Spectral retrieval is demonstrated in a single measurement of the stationary spatial interferogram formed at the output waveguides of the array, with a wavelength resolution of 40 pm within a free spectral range of 0.75 nm. The phase and amplitude errors arising from fabrication imperfections are compensated using a transformation matrix spectral retrieval algorithm.

Item Type:Article
Additional Information:

© 2013 Optical Society of America.
Financial support from the Spanish Ministry of Economy is acknowledged under grants TEC2008-04105 and TEC2011-23629.

Uncontrolled Keywords:Spatial Heterodyne Spectrometer, On-Insulator, Grating Demultiplexer
Subjects:Sciences > Physics > Optics
ID Code:25344
Deposited On:14 May 2014 07:57
Last Modified:14 May 2014 07:57

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