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The influence of velocity-changing collisions on resonant degenerate four-wave mixing

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3 Author(s)
Richardson, W.H. ; Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA ; Malecki, L. ; Garmire, E.

The phase-conjugate signal observed in resonant degenerate four-wave mixing on the 6/sup 3/P/sub 2/ to 7/sup 3/S/sub 1/ transition of atomic mercury in a Hg-Ar discharge is investigated. At a fixed argon pressure the variation of the signal with pump powers is explained by a model that includes the effects of velocity-changing collisions (VCCs). As the argon pressure was varied from 0 to 1 torr an increase in the phase conjugate signal was observed and is ascribed to a change in the discharge dynamics with argon pressure and to the influence of VCCs. To further clarify the role of collisions and optical pumping, degenerate four-wave mixing spectra are examined as a function of pump power. Line shapes are briefly discussed.<>

Published in:

Quantum Electronics, IEEE Journal of  (Volume:25 ,  Issue: 3 )

Date of Publication:

March 1989

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