Abstract
We present experimental results on a low-cost light source that utilizes
commercially available 405-nm/445-nm lasers to drive phosphor-based optical
cavities generating speckle-free red, green, and blue (RGB) light at selected
etendue and power values. By combining more 405/445-nm laser beams to drive
the optical cavities, enough RGB light can be generated for the most demanding
etendue-limited applications such as automotive headlights, biomedical devices
and projection systems. We report efficacies of 17, 18, and 14 lm/W for the
red (610 nm), green (530 nm), and white light, respectively, at an etendue
of 27 mm
$^{2}$
.sr.
© 2014 IEEE
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