Study on ring-LD side-pumping solid laser

This paper describes a new method of pump-coupling. Ring-LD tightly surrounds YLF stick to accomplish directly coupled side-pumping, total pumping power is 3kW. Correspondingly ideal pumping light utilizing efficiency and pump-field distribution are obtained by this way. Maximal output at wavelength 1054nm is 1.01J, converting efficiency form light to light efficiency is more than 60%.