Conception and reproducibility study of efficient evanescent Raman converters based a nanofiber immersed in a liquid
Résumé
We demonstrate, build and optimize evanescent Raman converters at the
sub-nanosecond regime based on a silica nanofiber immersed in ethanol.
Two different standard silica fibers (SMF28, 460HP) are tested and
compared. The converters are pumped at 532 nm and deliver pulses at 630
nm, which is the first Stokes order wavelength of ethanol. They present
highly reproductible performances. A maximum output Stokes energy of
0.29 μJ is usually reached with an external conversion efficiency of
60%. Lowering the Raman threshold and pushing up the nanofiber breakdown
allow a higher conversion operating range, that is the conception key
of these converters.
Domaines
Optique [physics.optics]
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