A KTiOAsO4 (KTA) Stokes parametric oscillator is placed in the cavity of a laser diode (LD) side-pumped Q-switched 1064-nm Nd 3+∶YAG resonant cavity. By non-collinear stimulated polariton scattering in the KTA crystal, a Stokes laser with discontinuously tuned wavelength in the range of 1078.20--1088.20 nm is obtained herein. This Stokes laser is used as the pump source of a collinear Raman lasers to achieve stimulated Raman scattering in the same KTA crystal. The output mirror transmittance of the Stokes resonant cavity is designed to output the first-order Raman laser with discontinuous tunability in the range of 1106.08--1116.62 nm. At an LD pump power of 94.20 W and a pulse repetition frequency of 5 kHz, a 1116.34-nm Raman laser with a maximum power of 1.62 W is obtained.