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.
DPAL: A new class of lasers for cw power beaming at ideal photovoltaic cell wavelengths
BEAMED ENERGY PROPULSION: Second International Symposium on Beamed Energy Propulsion ; 2003 ; Sendai (JAPAN)
AIP Conference Proceedings ; 702 , 1 ; 367-377
30.03.2004
11 pages
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
DPAL: A New Class of Lasers for CW Power Beaming at Ideal Photovoltaic Cell Wavelengths
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