The conceptual design of a 50-kW directly solar-pumped iodine laser (DSPIL) was developed for a space-based power station which transmitts it's coherent-beam power to users such as the moon, Martian rovers, or other satellites with large (greater than 25 kW) electric power requirements. Integration of multiple modules would provide an amount of power that exceeds the power of a single module by combining and directing the coherent beams to the user's receiver. The model developed for the DSPIL system conservatively predicts the laser output power (50 kW) that appears much less than the laser output (93 kW) obtained from the gain volume ratio extrapolation of experimental data. The difference in the laser outputs may be attributed to reflector configurations adopted in both design and experiment. Even though the photon absorption by multiple reflections in experimental cavity setup was more efficient, the maximum secondary absorption amounts to be only 24.7 percent of the primary. However, the gain volume ratio shows 86 percent more power output than theoretical estimation that is roughly 60 percent more than the contribution by the secondary absorption. Such a difference indicates that the theoretical model adopted in the study underestimates the overall performance of the DSPIL. This fact may tolerate more flexible and radical selection of design parameters than used in this design study. The design achieves an overall specific power of approximately 5 W/kg and total mass of 10 metric tons.
A 50-kW module power station of directly solar-pumped iodine laser
Sonnenenergie-gepumpter Jod-Laser für ein Laser-Weltraumkraftwerks-Modul mit 50 kW Leistung. Feasibility-Studie zur Energieübertragung im Weltraum mittels Infrarot-Laserstrahlen
Transactions of the ASME, Journal of Solar Energy Engineering ; 119 , 4 ; 304-311
1997
8 Seiten, 7 Bilder, 4 Tabellen, 24 Quellen
Article (Journal)
English
Directly Solar-Pumped Iodine Laser for Beamed Power Transmission in Space
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