26 October 2007 Optimization of coherent anti-Stokes Raman scattering microscopy using photonic crystal fiber
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Proceedings Volume 6796, Photonics North 2007; 67960D (2007) https://doi.org/10.1117/12.778079
Event: Photonics North 2007, 2007, Ottawa, Canada
Abstract
We have recently demonstrated coherent anti-Stokes Raman scattering (CARS) microscopy and multiplex CARS spectroscopy of lipid-rich structures based on a single femtosecond Ti:sapphire laser. A nonlinear photonic crystal fiber (PCF) with two closely lying zero dispersion wavelengths is used to generate the Stokes pulse. Further optimization in terms of higher spectral resolution in the CARS spectra can be achieved by adding a second PCF to the pump arm to produce a spectrally compressed picosecond pulse. Theoretical predictions from modeling the propagation of the negatively chirped pump pulse in the PCF, are compared with experimental results. The effect of pulse duration, peak power and the length of the PCF in determining the bandwidth of the spectrally compressed pump pulse are considered. It is shown that for higher average output power and constant pulse duration, it is desirable to use shorter length of the PCF for attaining transform limited spectral width of the pump pulse.
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Sangeeta Murugkar, Yury Logvin, Craig Brideau, Andrew Ridsdale, Peter Stys, Hanan Anis, "Optimization of coherent anti-Stokes Raman scattering microscopy using photonic crystal fiber", Proc. SPIE 6796, Photonics North 2007, 67960D (26 October 2007); doi: 10.1117/12.778079; https://doi.org/10.1117/12.778079
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