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Implementation of temporal ptychography algorithm, I²PIE, for improved single-beam coherent anti-Stokes Raman scattering measurements

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arxiv 2009.04734 v1 pith:MDPYXEZT submitted 2020-09-10 physics.optics

Implementation of temporal ptychography algorithm, I²PIE, for improved single-beam coherent anti-Stokes Raman scattering measurements

classification physics.optics
keywords sb-carssignal-to-backgroundsingle-beamalgorithmanti-stokescoherentfactorimplementation
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present an improvement on the signal-to-background of single-beam coherent anti-Stokes Raman scattering (SB-CARS) spectroscopy measurements for systems employing ultrafast supercontinuum sources based on all-normal dispersion photonic crystal fibers. Improvements to the signal-to-background arise in the use of a new pulse-reconstruction algorithm based on temporal ptychography, I$^2$PIE. A simple SB-CARS strategy is used to measure the spectrum of para-xylene, where the supercontinuum pulses used are compressed using multiphoton intrapulse interference phase scan (MIIPS) and, for the first time to the best of our knowledge, I$^2$PIE using the same single-beam setup. With the I$^2$PIE implementation, the signal-to-background is improved by nearly a factor of 4 in comparison with MIIPS. More notably, the integrated SB-CARS spectral intensity is increased by a factor of 6.5.

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