2.1.1. SC Source

In order to increase the spectral range of the AOTF-HSL, SC source (Figure 2) employed in this paper is with a large single pulse energy (>19 uJ) and the pulse width is two nanoseconds with power density distribution shown in Figure 3. The total power of the selected SC model is more than 8W, and the M2 factor of SC source is better than 1.1 with a 200 MHz maximum repeating rates. With such a powerful laser source, the effective range of AOTF-HSL is improved to several tens meters based on the previous experiments [32].

(a) AOTF (b) LCTF **Figure 3.** Employed filter device. (**a**) AOTF, (**b**) LCTF.
