Laser-excited phosphor light recycling using parabolic reflectors

This paper describes a patent pending system in which the configuration, utilizing a single parabolic reflector, could allow high power reflective phosphor mode of operation, accommodate multiple laser diodes, and recycles the high angle light for increased output with low NA. In addition, the reflective phosphor and the laser diodes are both mounted on the same heat sink allowing a simple light module design with low cost. The parabolic reflector functions as the coupling optics between the laser diodes and the phosphor plate and as part of the recycling optics. With an addition of another parabolic reflector, the system produces a focused output suitable for coupling light into a fiber optic or cable. Other related recycling systems are also described, which will be useful for various applications with different requirements.