title: Scanning Fourier transform spectrometer in the visible range based on birefringent wedges.
abstract: We introduce a spectrometer capable of measuring sample absorption spectra in the visible regime, based on a time-domain scanning Fourier transform (FT) approach. While infrared FT spectrometers typically employ a Michelson interferometer to create the two delayed light replicas, the proposed apparatus exploits a compact common-mode passive interferometer that relies on the use of birefringent wedges. This ensures excellent path-length stability (∼λ/300) and accuracy, with no need for active feedback or beam tracking. We demonstrate the robustness of the technique measuring the transmission spectrum of a colored bandpass filter over one octave of bandwidth and compare the results with those obtained with a commercial spectrophotometer.
authors.forename: Aurelio
authors.initials: A
authors.lastname: Oriana
authors.forename: Julien
authors.initials: J
authors.lastname: Réhault
authors.forename: Fabrizio
authors.initials: F
authors.lastname: Preda
authors.forename: Dario
authors.initials: D
authors.lastname: Polli
authors.forename: Giulio
authors.initials: G
authors.lastname: Cerullo