Diode Laser-Sustained Plasma for Continuous-Wave Laser Propulsion

This chapter delves into the promising method of laser-sustained plasma (LSP) for continuous-wave laser propulsion, with a particular emphasis on high-power diode lasers. LSP, a stationary thermal plasma generation approach, offers benefits like clean flows and the availability of active gases, as compared to arc discharge plasma and other electrodeless heating methods. Historically, the high costs and maintenance associated with CO2 lasers for LSP generation hindered its industrial adoption. However, the emergence of high-power diode and diode-pumped fiber lasers, characterized by better maintainability, lifespan, and cost-effectiveness, paves the way for more accessible LSP generation. Experimental findings, including temperature measurements and fractional absorption and radiation loss, further illuminate the potential of this technique.