Fig. 1. Schematic diagram of non-mode-locked pulse laser

Fig. 2. Drive signal and modulated spectrum of phase modulator. (a) 10 GHz RF drive signal; (b) broadened spectrum after phase modulation

Fig. 3. Drive signal and output optical pulse of intensity modulator. (a) Gaussian-like electric pulse (inset shows electrical pulse train within 80 ns); (b) optical pulse shaped by intensity modulator (inset shows optical pulse train within 40 ns)

Fig. 4. Output pulse characteristics of time lens. (a) Output pulse width of time lens (inset shows beam profile); (b) power stability of output pulse

Fig. 5. Experimental setup for TPF microscopy

Fig. 6. TPF microscopy results. (a) Rhodamine B sample captured by microscope objective; (b) TPF microscopy of crystalline region

Fig. 7. Relationship between TPF signal intensity and excitation power. (a) Result of TPF microscopy imaging; (b) fitted curves of average fluorescence intensities of three regions (A, B, and C) for different concentrations in Fig. 7(a) at different excitation powers