Characteristics of mercurous bromide and iodide visible lasers

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Abstract
Results are reported of an investigation on the performance of small scale TE discharge excited HgBr and HgI lasers. From a 10 cm3 active volume, the HgBr laser produced 6.5 mJ output pulses of 65 ns duration under the optimum excitation conditions. Laser emission has been found to be due to a large number of vibronic lines of the B-X electronic transition spanning the 495 to 507 nm spectral region. The HgI laser output energy was 2.9 mJ and pulse duration was 78 ns under optimum conditions. Laser emission has been observed over the 441 to 445.5 nm spectral region. The dependence of HgX (X=Br or I) laser performance on the operational conditions has been investigated and results are presented. Laser output spectra were found to be independent of the operational conditions.