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Narrow Band Amplification of Light Carrying Orbital Angular Momentum by Borba, G. C.; Barreiro, S.; Pruvost, L.; Felinto, D.; Tabosa, J. W. R. is a Engineering article available to read on EtoBox.

What is Narrow Band Amplification of Light Carrying Orbital Angular Momentum about?

We report on the amplification of an optical vortex beam carrying orbital angular momentum via induced narrow Raman gain in an ensemble of cold cesium atoms. A 20% single-pass Raman gain of a weak vortex signal field is observed with a spectral width of order of 1 MHz, much smaller than the natural width, demonstrating that the amplification process preserves the phase structure of the vortex beam. The gain is observed in the degenerated two-level system associated with the hyperfine transition 6S~1/2~(F = 3) ↔ 6P~3/2~(F' = 2) of cesium. Our experimental observations are explained with a simple theoretical model based on a three-level Λ system interacting coherently with the weak Laguerre-Gauss field and a strong coupling field, including an incoherent pumping rate between the two degenerate ground-states.

Who reads Narrow Band Amplification of Light Carrying Orbital Angular Momentum?

Author

Borba, G. C.; Barreiro, S.; Pruvost, L.; Felinto, D.; Tabosa, J. W. R.

Publisher

Optical Society of America; The Optical Society; Washington DC: Optical Society of America, 1997- (ISSN 1094-4087)

Published

2016

Language

EN

Field

Engineering (Physical Sciences)