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Opt Lett. 2010 Jul 15;35(14):2361-3. doi: 10.1364/OL.35.002361.

Highly efficient Cherenkov radiation in photonic crystal fibers for broadband visible wavelength generation.

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  • 1Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA. guoqing@mit.edu


We investigate the dependence of Cherenkov radiation (CR) on pump pulse parameters and its evolution along the propagation distance. Using a Ti:sapphire laser emitting 10 fs pulses as the pump source, we demonstrate highly efficient (>40%), broadband (>50 nm) CR in the visible-wavelength range with a threshold energy less than 100 pJ and a tuning range over 100 nm.

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