Discharge-pumped “dressed-atom” coherent light...

Details Discharge-pumped “dressed-atom” coherent light... Discharge-pumped “dressed-atom” coherent light...

2006-09-12

2006-09-12

Rodriguez, Armando (Department: 2828)

Coherent light generators

Particular active media

Gas

C372S039000

Reexamination Certificate

active

07106776

ABSTRACT:
A novel practicable type of gaseous optical gain medium for efficiently generating intense, highly monochromatic, continuous-wave (CW) or pulsed, coherent light beams is disclosed. Gain results from nonlinear optical pumping of a gas of Λ-type “three-level” atoms, coherently phased (“dressed”) via application to the medium of two monochromatic laser beams tuned to the resonance frequencies ω0and ω′0. Nonlinear optical pumping of the “dressed-atom” gas is accomplished through the combined action of two separate physical processes: (1) A low pressure gaseous discharge, occurring continuously within the vessel containing the gain medium, produces intense narrow-band fluorescence at ω0and ω′0through the process of electron impact excitation (EE). (2) Via a specific form of the nonlinear photonic process of stimulated hyper-Raman scattering (SHRS), photons comprised by the narrow-band fluorescence generated in (1) are efficiently converted to photons comprised by the propagating coherent light beams at ω0and ω′0, thus effecting amplification of the latter.

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patent: 2000049409 (2000-02-01), None

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