Optimized continuum from a photonic crystal fiber for broadband time-resolved coherent anti-Stokes Raman scattering
Young Jong Lee, Sapun Parekh, Yeon Ho Kim, Marcus T. Cicerone
We demonstrate that an optimized 2-pulse broadband coherent anti-Stokes Raman scattering (CARS) technique can be used to simultaneously measure vibrational dephasing times over a broad frequency range of Raman modes (between 500 cm-1 and 3100 cm-1). This time-resolved measurement, based on 3-color CARS, requires a continuum pulse that is coherent over a broad spectral bandwidth. We demonstrate that a continuum with the required characteristics can be generated from a commercial photonic crystal fiber by appropriately conditioning the chirp of the excitation pulse and controlling its pulse energy. We apply the optimized broadband time-resolved CARS system to simultaneously measure vibrational dephasing times of multiple Raman modes (covering 500 cm-1 to 3100 cm-1) of acetonitrile and benzonitrile.
, Parekh, S.
, Kim, Y.
and Cicerone, M.
Optimized continuum from a photonic crystal fiber for broadband time-resolved coherent anti-Stokes Raman scattering, Optics Express, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=904650
(Accessed September 21, 2023)