We report an electro-optic Bragg modulator using a periodically poled lithium niobate (PPLN) crystal. We measured a half-wave voltage of $160\mathrm{V}$ when transmitting a $1064\mathrm{nm}$ laser through a $14.2\mathrm{mm}$ long, $780\mu \mathrm{m}$ thick, $20.13\mu \mathrm{m}$ period PPLN crystal at the Bragg angle. We also demonstrated a Q-switched $\mathrm{Nd}:\mathrm{Y}\mathrm{V}{\mathrm{O}}_4$ laser using such a PPLN Bragg modulator as its Q-switch, producing $7.8\mathrm{ns}$ , $201\mu \mathrm{J}$ pulses at a $10\mathrm{kHz}$ repetition rate when pumped by a $19.35\mathrm{W}$ diode laser at $808\mathrm{nm}$ .