Villafranca Velasco, AitorCheben, PavelBock, Przemek J.Schmid, Jens H.Delâge, AndréLapointe, JeanJanz, SiegfriedCalvo Padilla, María LuisaXu, Dan-XiaFlorjańczyk, MirosławVachon, Martin2023-06-192023-06-192013-03-010146-959210.1364/OL.38.000706https://hdl.handle.net/20.500.14352/33533© 2013 Optical Society of America. Financial support from the Spanish Ministry of Economy is acknowledged under grants TEC2008-04105 and TEC2011-23629.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.engjournal articlehttp://dx.doi.org/10.1364/OL.38.000706http://www.opticsinfobase.org/open access535Spatial Heterodyne SpectrometerOn-InsulatorGrating DemultiplexerÓptica (Física)2209.19 Óptica Física