Phys. Rev. Lett. 69, 3635 (1992)https://ireap.umd.edu/10.1103/PhysRevLett.69.36351992
N.A.
Bogatov
M.S.
Gitlin
A.G.
Litvak
A.G.
Luchinin
Gregory S.
Nusinovich
Journal ArticlePlasma, Accelerator, and Nuclear PhysicsMillimeter-wave phase conjugation was realized under resonantly enhanced degenerate four-wave mixing in gaseous carbonyl sulfide. The nonlinear wave interaction was caused by saturation of a transition between rotational levels. For radiation with λ=1.64 mm, phase-conjugate reflectivity of about 0.4% has been observed at a gas temperature of 200 K, and under optimal pressure.
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