Effectiveness of recycling light in ultra-bright short-arc discharge lamps

Asher Malul, Doron Nakar, Daniel Feuermann, Jeffrey M. Gordon

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Recycling light back into a plasma lamp's radiant zone can enhance its radiance. Measurements are reported for the effectiveness, spectral properties and modified plasma radiance maps that result from light recycling with a specular hemispherical mirror in commercial 150 W ultra-bright Xenon short-arc discharge lamps, motivated by projection, biomedical and high-temperature furnace applications. For certain spectral windows and plasma arc regions, radiance can be heightened by up to 70%. However, the overall light recycling efficiency is reduced to about half this value due to lamp geometry. The manner in which light-plasma interactions affect light recycling efficacy is also elucidated.

Original languageEnglish
Pages (from-to)14194-14201
Number of pages8
JournalOptics Express
Issue number21
StatePublished - 17 Oct 2007
Externally publishedYes


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