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Optik

Nonlinear phase matching in parametric four-wave mixing process of Cs vapor

Hanghang Yu, Fei Chen, Yang He, Qikun Pan, Deyang Yu, Jijiang Xie

Published Oct 21, 2019• 5 citations
Publisher
DOI
10.1016/j.ijleo.2019.163583

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Collimated ultraviolet (UV) light is generated via four-wave mixing (FWM) in cesium vapor by continuously tuning the wavelength of the pump laser. Terahertz (THz) Stokes light is generated by the stimulated Raman scattering (SRS) effect in the FWM process, and its frequency is adjustable. When exciting the cesium atom to a virtual level using different combinations of pump lasers (P1 and P2), the strength distribution of UV light is asymmetric, which can be explained through a phase-matching mechanism. Furthermore, the SRS effect and phase matching influence the FWM.