Stokes amplification regimes in quasi-cw pumped hydrogen-filled hollow-core photonic crystal fiber.
Pure rotational stimulated Raman scattering spectra containing nine strong spectral components were generated from a approximately 11 m long hollow-core photonic crystal fiber filled with hydrogen and pumped with nanosecond pulses having energies around 100-300 nJ. Observation of both transient and steady-state scattering threshold behavior is reported. Passage from the transient to the steady state is observed with a pulse as long as 14 ns. Convenient analytical expressions for energy and power threshold are deduced for the present configuration.
Benabid
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Photonics and Photonic Materials Group, Department of Physics, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom.
Antonopoulos
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Knight
J C
JC
Russell
P St J
PS