Abstract
We demonstrate a scheme for efficient coherent anti-Stokes Raman scattering (CARS) microscopy free of nonresonant background. Our method is based on a compact Er:fiber laser source. Impulsive excitation of molecular resonances is achieved by an pulse at . Broadband excitation gives access to molecular resonances from up to . Time-delayed narrowband probing at enables sensitive and high-speed spectral detection of the CARS signal free of nonresonant background with a resolution of .
© 2010 Optical Society of America
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