In this study, we investigate the key factors affecting the half-wave voltage of an electro-optic slitter. Results show that an effective method for reducing the voltage is applying the crystal with large effective electro-optic coefficient and designing the transverse/longitudinal ratio of the crystal. Thus, a low half-wave voltage LN electro-optic slitter is designed and fabricated. Furthermore, the electro-optic effect is maximized using 90° x-cut crystals with radiation propagating along the x-axis and the control voltage applied along the z-axis. Also, compensation of natural birefringence is achieved using two LN crystals whose z-axes are rotated relative to one another by 90°. The optical quality of the z-faces of the LN crystal is good. The half-wave voltage is measured at ~900 V under DC high voltage, and the dynamic extinction ratio is 200∶1. Upon driving the electro-optic slitter using a pulsed high voltage of 800 V, 0.95 ns, and 1 Hz, we obtain a 1.46 ns, 1 Hz laser pulse output from a 1064 nm continuous wave laser. The output laser pulse waveform of the electro-optic slitter is related to the electrical pulse waveform of the driving power supply. For future work, we hope to obtain a laser pulse with a narrower pulse width by reducing the width of the electrical pulse.