title: High-resolution Fourier-transform spectrometer chip with microphotonic silicon spiral waveguides.
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 mm2. 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.
authors: Departamento de Óptica, Facultad de Ciencias Físicas, Universidad Complutense de Madrid, Madrid, Spain. avillafr@pdi.ucm.es
authors: Aitor V
authors: AV
authors: Velasco
authors: Pavel
authors: P
authors: Cheben
authors: Przemek J
authors: PJ
authors: Bock
authors: André
authors: A
authors: Delâge
authors: Jens H
authors: JH
authors: Schmid
authors: Jean
authors: J
authors: Lapointe
authors: Siegfried
authors: S
authors: Janz
authors: María L
authors: ML
authors: Calvo
authors: Dan-Xia
authors: DX
authors: Xu
authors: Mirosław
authors: M
authors: Florjańczyk
authors: Martin
authors: M
authors: Vachon
mesh_terms: D000465:Algorithms; D005583:Fourier Analysis; D007368:Interferometry; D007834:Lasers; D017785:Photons; D012825:Silicon; D013057:Spectrum Analysis / Q000295:instrumentation*
chemical_list: D012825:Silicon