Generation of a continuous-wave pulse train at a repetition rate of 176THz

Abstract

We demonstrated that a 17.6THz pulselike intensity modulation resulted from the coherent superposition of multifrequency continuous-wave emissions generated from a hydrogen-filled high-finesse cavity through a cascade-stimulated Raman scattering process. We pointed out that the complete phase-locked operation was hindered by the intracavity dispersion that caused nonequal separations between adjacent emission lines.