We report on the frequency doubling of a Ti:Sa laser at a wavelength of $852\mathrm{nm}$ , corresponding to the cesium $D_2$ line, using a periodically poled KTP crystal (PPKTP) placed in a singly resonant ring cavity. We have obtained a maximum stable power of $330\mathrm{mW}$ for a mode-matched power of $600\mathrm{mW}$ $(\eta =55\%)$ . This is, to our knowledge, the highest power obtained at this wavelength with PPKTP; moreover, the setup is inherently simple and robust.