Fig. 1. (a) Experimental setup of ultrafast THz wave measurement; (b) crossed and balanced single-shot detection system; (c) detection system of traditional wavelength encoding THz single-shot measurement system reported in Ref. [14]

Fig. 2. (a) Modulated spectra in two arms for crossed and balanced measurement; (b) spectra with (red line) THz modulation by traditional method and without (black line) THz modulation

Fig. 3. THz temporal profiles in different static birefringent phases of (a) proposed design and (b) traditional design

Fig. 4. Normalized THz fields of the proposed method with α=0.040 rad (red line) and traditional method with α=0.150 rad (black line). The insert shows the THz noise fluctuation measured by two methods