1 July 2004 Non-edge-ray design: improved optical pumping of lasers
Author Affiliations +
Optical Engineering, 43(7), (2004). doi:10.1117/1.1751400
Abstract
We propose a novel design method for reflective nonimaging concentrators that is based on maximizing system performance beyond standard nonimaging metrics of transfer efficiency and proscribed illumination distribution. This new technique enables system operation characteristics to influence the algorithm, including nongeometrical parameters. This algorithm is termed non-edge-ray design (NERD) because we found that edge rays do not always give optimal illumination design. The case of a diode-pumped, Nd:YAG solid state laser is provided as a confirmation of the design utility. The pump-to-mode configuration, which includes a nonimaging pump cavity reflector, is the focus of this investigation. The merit function of the design process includes not only the transfer efficiency from an extended, 2-D laser diode array, but also the mode coupling of the absorption distribution within a laser rod to its desired output mode. Standard edge-ray design is shown to limit performance, with both numerical and experimental results. Two alternative pump cavity reflectors are developed and the improvements in the outputs from the lasers in TEM00 modes are presented. A periodic cavity sees over 8% improvement in optical efficiency at an output power of 10 W, while an averaging cavity provides nearly 5% improvement.
R. John Koshel, Ian A. Walmsley, "Non-edge-ray design: improved optical pumping of lasers," Optical Engineering 43(7), (1 July 2004). https://doi.org/10.1117/1.1751400
JOURNAL ARTICLE
11 PAGES


SHARE
RELATED CONTENT

High-power 885nm end-pumped Nd:YAG laser
Proceedings of SPIE (February 19 2007)
Non-edge ray reflector design for illumination systems
Proceedings of SPIE (October 02 2000)
Generation characteristics of diode-pumped Nd:YAG lasers
Proceedings of SPIE (March 01 1995)
Highly efficient quasi cw Nd YAG laser side pumped in...
Proceedings of SPIE (April 03 2000)

Back to Top