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Power-by-light systems and their components: an evaluation

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Abstract

This paper describes the testing of small sized systems and their components that use power-by-light (PBL) to transfer energy across a barrier. The PBL systems used improved high power laser diodes, large numerical aperture fibers, improved high efficient, high power solar cells, and low input-to-high output voltage dc–dc converters. The laser diodes emitted up to 3.6 W continuously by converting ~40% of its electrical power to light power into fibers that transmitted up to 92% of its incident energy flux. The specially fabricated solar cell converted 46% of its incident light power to electrical power at a fill factor of 89%. The most efficient 100-and 220-mJ PBL systems charged capacitors in 0.64 and 0.8 s for a total system efficiency of 3.4 and 5.5%. Expected improvements could yield system efficiencies of 12%.

© 1991 Optical Society of America

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