Adiabatic inversion for selective excitation

Details Adiabatic inversion for selective excitation Adiabatic inversion for selective excitation

G - Physics

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G21G 1/12 (2006.01) B01D 59/50 (2006.01) H01S 3/10 (2006.01) H01S 3/23 (2006.01)

Patent

CA 1043475

A B S T R A C T Method and apparatus for achieving isotopically selective adiabatic inversion, particularly for improved isotope separation efficiency. In a preferred embodiment for practicing the inven- tion, chirped laser radiation induces photoionization of a vapor state material in isotopically selective excitation and ioniza- tion energy steps. A frequency sweep or "chirp" is provided in the excitation laser radiation at a controlled rate and over a range of frequencies which is limited to prevent loss of selec- tivity in the excitation. The frequency swept radiation has a theoretical capability of producing 100% inversion of ground state particles in the vapor. The features of the invention additionally permit excitation of a material to very high energy states useful in producing high frequency, ultraviolet lasing.

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