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Updated: Jun 20, 2026

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Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing
Published on: March 22, 2019
Quantitative characteristics of pressure-induced degenerate frequency resonance in four-wave mixing with
A R Bogdan1, M W Downer, N Bloembergen
1Division of Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA.
Optics Letters
|August 25, 2009
Abstract:
The linewidth and intensity of the four-wave degenerate mixing signal in Na vapor have been observed as functions of He buffer-gas pressure with cw single-mode dye-laser beams. The width is independent of He pressure, and a quantitative comparison with theory is made. We also report the observation of a new effect, a four-wave mixing Raman-type resonance between two equally populated hyperfine levels.

