Pump-Induced Stimulated Superradiant Smith-Purcell Radiation with Ultra-Narrow Linewidth
Chinese Academy of SciencesFree electron lasers have unique advantages of high power, wide frequency tunablility and et al, however, they face challenge in narrowing the spectral linewidth. Scientists in China proposed and realized the pump-induced stimulated superradiant Smith-Purcell radiation (PIS-SPR) and achieved an ultra-narrow spectral linewidth of 0.3 kHz at ~0.3 THz in a compact device.