RT Journal Article
T1 Subwavelength grating Fourier-transform interferometer array in silicon-on-insulator
A1 Bock, Przemek J.
A1 Cheben, Pavel
A1 Villafranca Velasco, Aitor
A1 Schmid, Jens H.
A1 Delâge, André
A1 Florjańczyk, Mirosław
A1 Lapointe, Jean
A1 Xu, Dan-Xia
A1 Vachon, Martin
A1 Janz, Siegfried
A1 Calvo Padilla, María Luisa
AB A planar waveguide Fourier-transform spectrometer with densely arrayed Mach-Zehnder interferometers is demonstrated. Subwavelength gratings are used to produce an optical path difference without waveguide bends. The fabricated device comprises of an array of 32 Mach-Zehnder interferometers, which produce a spatial interferogram without any moving parts, yielding a spectral resolution of 50 pm and a free-spectral range of 0.78 nm. As a result of similar propagation losses in subwavelength grating waveguides and conventional strip waveguides, loss imbalance is minimized and high interferometic extinction ratio of -25 to -30 dB is obtained. Furthermore, phase and amplitude errors arising from normal fabrication variation are compensated by the spectral retrieval process using calibration measurements.
PB Wiley-V C H Verlag GMBH
SN 1863-8880
YR 2013
FD 2013-11
LK https://hdl.handle.net/20.500.14352/33530
UL https://hdl.handle.net/20.500.14352/33530
NO © 2013 by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.This research was conducted at the National Research Council Canada. Coauthor A. V. V. acknowledges the financial support from the Spanish Ministry of Economy under grant EC2011-23629.
NO Ministerio de Economía, España
DS Docta Complutense
RD 6 abr 2025