Third harmonic generation and four-wave parametric mixing in sodium vapour

Resonantly enhanced parametric four-wave mixing in sodium vapour

Four-photon resonantly enhanced six-wave mixing and third-harmonic generation in potassium vapour

Two-photon resonant four-wave mixing in atomic sodium vapour

Continuous-wave, single frequency, second harmonic generation in sodium vapour

Conical four-wave mixing in sodium vapour excited by femtosecond laser pulses

Picosecond phase-conjugation by degenerate four-wave mixing in sodium vapour