A nanosecond $1.3\mathrm{\mu m}$ Nd:YAG laser-pumped external cavity eye-safe Raman laser based on ${\mathrm{BaWO}}_4$ crystal is efficiently demonstrated. The average power of $1.5\mathrm{\mu m}$ was $0.60\mathrm{W}$ operating at a pulse repetition rate of $1.7\mathrm{kHz}$ and an incident pump power of $4.14\mathrm{W}$ . Conversion efficiency of 14.5% and a high slope efficiency of 54.5% have been achieved. Pulse shortening was obviously observed. The pulse duration of the first Stokes was about $40\mathrm{ns}$ , much shorter than the fundamental pulse with a duration of $\sim 220\mathrm{ns}$ .