Quenching kinetics and small signal gain spectrum of the ZnI photodissociation laser |
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Authors: | AW McCown MN Ediger JG Eden |
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Institution: | Department of electrical Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA |
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Abstract: | By photodissociation ZnI2 with 193 nm (ArF) laser radiation, the rate constants for quenching of the upper and lower energy levels of the ZnI (B → X) laser by ZnI2 have been measured to be (1.7 ± 0.2) × 10-9 and (1.4 ± 0.4) × 10-9 cm3 s-1, respectively. Although the former rate constant was found to be laser intensity-dependent for I ? 105 W cm-2, the ZnI(B) state radiative lifetime was determined to be 26 ± 4 ns. Also, the small signal gain coefficient, g0, of this molecular laser has a peak value of ? 15% cm-1 at λ ? 602 nm and exceeds 5% cm-1 for 591 nm ≤ λ ≤ 608 nm for a potential tuning range of at least 170 Å. |
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