Abstract
Generation of thrust by laser propulsion has gained reality and much attention due to the recent development of high average-power lasers and demonstrations of sizeable object launching. Generating thrust requires a large amount of energy or high average power, but the question is how it is provided. This study deals with effectiveness of highly repetitive ultrashort laser pulses on generating high momentum coupling coefficient, Cm in vacuum condition. Two laser parameters, pulse width and repetition rate, have been studied in terms of the enhancement of Cm. It was found that with pico- and femtosecond pulse ablation, higher Cm is generated compared with longer pulse duration although it is on the same scaling as longer pulse duration. With high repetition rate pulses (80 MHz), more than one order of magnitude enhancements in Cm have been observed compared with single pulse interaction.
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