We study supercontinuum (SC) generation in large-mode-area (LMA) photonic crystal fibers with various core sizes and lengths, pumped by a picosecond Nd:YVO4 laser. Micro-joule level SC pulse energy is achieved, and the spectrum extends beyond 1600 nm, corresponding to an effective Raman detection range over 3000 wavenumbers. A multiplex CARS setup based on the SC source is constructed, and we demonstrate CARS acquisition in air, and compare the signal obtained with different LMA fiber parameters.
Yujie Shen, Alexander A. Voronin, Aleksei M. Zheltikov, Sean P. O'Connor, Vladislav V. Yakovlev, Alexei V. Sokolov, and Marlan O. Scully, "Supercontinuum generation in large-mode-area photonic crystal fibers for coherent Raman microspectroscopy," Proc. SPIE 10522, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XVIII, 105220I (Presented at SPIE LASE: January 29, 2018; Published: 19 February 2018); https://doi.org/10.1117/12.2285103.
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