title: Wavelength-dispersive device based on a Fourier-transform Michelson-type arrayed waveguide grating.
abstract: We propose a new type of arrayed waveguide grating (AWG) device that operates as a Fourier-transform (FT) spectrometer without the need of scanning elements. The large input aperture size typical of a FT spectrometer eliminates the requirement for a narrow single-mode input waveguide while still achieving high spectral resolution with a markedly increased light-gathering capability (etendue). An example of the device with a resolution of 0.07 nm (approximately 10 GHz) and designed for a silicon-on-insulator platform is presented. The calculated spectra show no noticeable deterioration for aperture widths as large as 40 microm, yielding more than a 50-fold increase in aperture size compared with conventional AWG or echelle grating based devices at the equivalent resolution.
authors.affiliation: Institute for Microstructural Sciences, National Research Council of Canada, Ottawa, Ontario, Canada. pavel.cheben@nrc.ca
authors.forename: Pavel
authors.initials: P
authors.lastname: Cheben
authors.forename: Ian
authors.initials: I
authors.lastname: Powell
authors.forename: Siegfried
authors.initials: S
authors.lastname: Janz
authors.forename: Dan-Xia
authors.initials: DX
authors.lastname: Xu