Ultrashort optical pulse sources can enhance data transmission rates and nonlinear interaction efficiency, holding significant importance in fields such as optical communications, ultrafast spectroscopy, and optical computing. Compared with methods using microresonator optical frequency combs or mode-locked lasers for optical pulse generation, temporal lens systems composed of cascaded electro-optic modulators and dispersion compensation units exhibit distinct advantages, including excellent system coherence and compatibility with on-chip integration. This paper proposes a temporal lens system based on a cascaded electro-optic modulator with thin-film lithium niobate slow-wave electrodes for generating ultrashort optical pulses. The designed Mach-Zehnder intensity modulator achieves a modulation efficiency of 2.46 V.cm and a modulation bandwidth exceeding 100 GHz without substrate removal or replacement. On this basis, simulations of the temporal lens system driven by microwave signals at different frequencies were conducted. The results show that the system generates 21, 17, and 17 comb lines with flatness less than 3 dB at 10 GHz, 30 GHz, and 45 GHz, respectively. After compression by a single-mode fiber, the generated optical pulses exhibit widths of 3.45 ps, 1.5 ps, and 1 ps, verifying the effectiveness of this temporal lens system as an ultrafast optical pulse source.