By experiment we obtained the half-wave voltage of Ti:LiNbO_3 waveguide phase modulator U=1.83V. Its error is less than 0.1V. The experiment results are in accordance with the theoretic analysis.

• 测得的矿用Ti:LiNbO_3波导相位调制器半波电压U_=1.；83V；误差小于0