Generation of cw orange laser radiation at 590-nm by single-pass frequency doubling of 1180-nm high-power Raman fiber laser in a 20-mm long bulk periodically poled MgO doped lithium niobate (PP-MgO: LN) crystal is presented. A maximum cw orange output power of 1.52 W with conversion efficiency of 7.7 % and the power stability of±1.3% over a two-hour period has been achieved.
