Abstract

The laser action of an all-gas-phase iodine laser that uses molecular iodine as a source of iodine atoms has been demonstrated. The laser is based on the energy transfer reaction between metastable NCl(a 1Δ) and ground-state I( 2P 3/2) atoms. The replacement of iodine source from HI to I 2 had been desired, but it was considered to be difficult due to the high deactivation reaction rate of excited iodine atoms by residual I 2. In this system, iodine atoms are produced by microwave discharge. Continuous-wave laser output of 35 mW with a duty factor of 40% was observed. This is 70% of the output from the same system with HI iodine source.

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