X2Σ→B2Σ absorption band of HgBr: Optically pumped 502-nm laser

D. P. Greene, K. P. Killeen, J. G. Eden

Research output: Contribution to journalArticlepeer-review


The X2Σ+1/2→B 2Σ+1/2 absorption band of HgBr has been observed in the afterglow of a pulsed Ne-N2-HgBr2 discharge. Peaking in the ultraviolet (UV) near 350 nm, this continuum degrades slowly to the red and at 410 nm the absorption coefficient is 30% of its maximum value. Upon exciting the X→B band with an XeF (351 nm) or frequency tripled Nd:YAG (355 nm) laser, intense lasing is observed in the blue-green (λ∼502 nm). For λpump=351 nm, the energy conversion efficiency (UV to green) is 22% which corresponds to a photon conversion efficiency of 32%. The quantum efficiency for this four level system is 71%.

Original languageEnglish (US)
Pages (from-to)1175-1177
Number of pages3
JournalApplied Physics Letters
Issue number18
StatePublished - 1986

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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