Lasing at λ = 97.2 nm in hydrogen
Troshin B.I., Chebotaev V.P., Chernenko A.A.
Lasing was produced at the wavelength λ = 97.2 nm in monatomic hydrogen near the A Ρ-IS transition by resonant mixing of two second-harmonic photons and one fundamental-frequency photon of a pulsed dye laser.