Abstract

The buildup and decay of the HgBr $X{}^2{\Sigma }_{1/2}^{+}$ species during a pulsed discharge in Ne, N₂, and HgBr₂ vapor and in its afterglow have been examined by monitoring $B{}^2{\Sigma }_{1/2}^{+}\leftarrow X{}^2{\Sigma }_{1/2}^{+}$ absorption by the discharge at 351 nm. Also, the UV-to-green conversion efficiency for the 350-nm pumped HgBr laser is shown to be sensitive to the 502-nm fluence circulating in the cavity when the XeF laser pump pulse arrives. The maximum observed efficiency (η) of 22% is obtained for intracavity intensities of 1 to 2 MW/cm², but η falls to ~10% for I ≃ 1 kW/cm².

© 1986 Optical Society of America

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