DPAL: A new class of lasers for cw power beaming at ideal photovoltaic cell wavelengths

Details DPAL: A new class of lasers for cw power beaming at ideal photovoltaic cell wavelengths DPAL: A new class of lasers for cw power beaming at ideal photovoltaic cell wavelengths

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aipc..702..367k&link_type=abstract

BEAMED ENERGY PROPULSION: Second International Symposium on Beamed Energy Propulsion. AIP Conference Proceedings, Volume 702, p

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Spaceborne And Space Research Instruments, Apparatus, And Components, Laser Applications, Gas Lasers Including Excimer And Metal-Vapor Lasers, Diode-Pumped Lasers

Scientific paper

The new class of diode pumped alkali vapor lasers (DPALs) offers high efficiency cw laser beams at wavelengths which efficiently couple to photovoltaic (PV) cells: silicon cells at 895 nm (cesium), and GaAs cells at 795 nm (rubidium) and at 770 nm (potassium). DPAL electrical efficiencies of 25-30% are projected, enabling PV cell efficiencies ~40% (Si) and ~60% (GaAs). Near-diffraction-limited DPAL device power scaling into the multi-kilowatt regime from a single aperture is projected. The potential application to power beaming propulsion to raise satellites from LEO to Geo is discussed.

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