Publication: High-resolution Fourier-transform spectrometer chip with microphotonic silicon spiral waveguides
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2013-03-01
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The Optical Society Of America
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Abstract
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.
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© 2013 Optical Society of America.
Financial support from the Spanish Ministry of Economy is acknowledged under grants TEC2008-04105 and TEC2011-23629.
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