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Opt Express. 2011 May 23;19(11):10913-22. doi: 10.1364/OE.19.010913.

Multistage VIPA etalons for high-extinction parallel Brillouin spectroscopy.

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1
Harvard Medical School and Wellman Center for Photomedicine, Massachusetts General Hospital, 65 Landsdowne St, UP-522, Cambridge, Massachusetts 02139, USA.

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%.

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