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Efficient transmissive remote phosphor configuration for a laser-driven high-luminance white light source

Journal Contribution - Journal Article

To realize laser-driven high-luminance white light sources, many reflective configurations have been studied, often resulting in a challenging optical design. In this paper it is demonstrated that the efficacy of a transmissive configuration can be significantly enhanced by using a sapphire half-ball lens as out-coupling optic. This lens not only improves efficiency, but also drastically increases the potential light output due to improved heat dissipation from the single-crystal phosphor converter. Both claims are substantiated with detailed experimental results and realistic opto-thermal simulations, showing a light output of 6550 lm and over 20000 lm, respectively and corresponding luminance of 67 MCd/m(2) and 209 MCd/m(2). (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
ISSN: 1094-4087
Issue: 4
Volume: 30
Pages: 5107 - 5120
Publication year:2022