SUBNANOSECOND PULSE GENERATION IN THE VUV BY DUAL-WAVELENGTH PUMPED STIMULATED ROTATIONAL RAMAN-SCATTERING

A novel scheme to generate a subnanosecond pulse in VUV spectral regio n is proposed, by applying a dual-wavelength pumping method in conjunc tion with polarization switching technique to the stimulated rotationa l Raman scattering process. Optimum conditions for the efficient conve rsion and short pulse generation are presented through numerical model calculations, It is theoretically shown that the duration of the firs t anti-Stokes pulse of a VUV pump laser can be shorten to 0.72 ns, Sin ce the anti-Stokes pulse is generated at a frequency within the gain p rofile of the pump laser, the proposed process is applicable to a seed pulse generation for subnanosecond pulse amplification by the pump la ser medium in the VUV region.