Ce:YAG Fluorescent Illumination

As LED lighting made it obvious, white light can be generated by blue LED pumping of phosphors or fluorescent crystals such as Cerium-doped YAG crystals (Ce:YAG). However, the relatively large emitting area of blue LEDs and their highly divergent light beams result in a fluorescent light source of very large optical etendue (emitter area times l...

As LED lighting made it obvious, white light can be generated by blue LED pumping of phosphors or fluorescent crystals such as Cerium-doped YAG crystals (Ce:YAG). However, the relatively large emitting area of blue LEDs and their highly divergent light beams result in a fluorescent light source of very large optical etendue (emitter area times light beam divergence) unsuitable for effective fluorescence coupling into small core optical fibers. Optogenetics and other life science applications require tens of milliwatts of suitable bandwidth into the small core diameter of optical fibers. Consequently, we designed fluorescent light sources, called the Ce:YAG Fiber Light Sources, in which a Ce:YAG crystal is pumped over a very small area with multiple high-power blue laser diodes instead of LEDs. This patent pending laser diode pumping geometry creates a small area fluorescence light emitter. This is optimized for efficient coupling into the small core diameter of optical fibers, unlike the LED based light sources and other technologies such as arc lamps and incandescent lamps.

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Ce:YAG Fluorescent Illumination