title: Multistage VIPA etalons for high-extinction parallel Brillouin spectroscopy.
abstract: We demonstrate a high-resolution high-extinction parallel spectrometer for Brillouin spectroscopy of turbid samples. Cascading multiple VIPA etalons in the cross-axis configuration allowed us to achieve a high extinction ratio of up to 80 dB with sub-GHz resolution. Using a three-stage VIPA, we obtained the Brillouin spectra from Intralipid solutions at concentrations up to 10%.
authors.affiliation: Harvard Medical School and Wellman Center for Photomedicine, Massachusetts General Hospital, 65 Landsdowne St, UP-522, Cambridge, Massachusetts 02139, USA.
authors.forename: Giuliano
authors.initials: G
authors.lastname: Scarcelli
authors.forename: Seok Hyun
authors.initials: SH
authors.lastname: Yun