Phase-matched four-wave mixing and sensing of water molecules by coherent anti-Stokes Raman scattering in large-core-area hollow photonic-crystal fibers
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abstract
Phase-matched four-wave mixing is demonstrated for millijoule nanosecond pulses guided by photonic bandgaps of hollow fibers with a two-dimensionally periodic cladding and a core diameter of 50 m. Raman resonances related to the stretching vibrations of water molecules inside the hollow fiber core are detected in the spectrum of the four-wave mixing signal, suggesting phase-matched coherent anti-Stokes Raman scattering in hollow photonic-crystal fibers as a convenient sensing technique for condensed-phase species adsorbed on the inner fiber walls and trace gas detection. 2005 Optical Society of America.
