AIP conference proceedings
The direct observation of gain on the 1.315 μm transition of atomic iodine produced by the energy transfer from NCl(a[sup 1]Δ) to I([sup 2]P[sub 3/2])
John M. Herbelin, Thomas L. Henshaw, Brent D. Rafferty, Brian T. Anderson, Ralph F. Tate, Timothy J. Madden, Gerald C. Manke, Gordon D. Hager
Abstract
Gain between the I(2P3/2) and I*(2P1/2) states of atomic iodine at 1.315 μm was detected in a transverse subsonic flow reactor that produced electronically excited I*(2P1/2) atoms from the efficient energy transfer reaction between NCl(a1Δ) metastables and ground state I(2P3/2) atoms. The population inversion was directly observed using a 1.315 μm tunable diode laser that scanned across the entire I(2P3/2)−I*(2P1/2) hyperfine transition with complete resolution.