Direct generation of orthogonally polarized dual-wavelength double pulse Pr: YLF visible laser

This paper presents a flexible method for directly generating an orthogonally polarized dual-wavelength double pulse Pr: YLF visible laser. A theoretical model is established to reveal the oscillation mechanism of the orthogonally polarized dual-wavelength double pulse laser. Theoretical results demonstrate that the ratio of orthogonally polarized dual-wavelength laser intensity and master-slave pulse energy, along with the time delay between the master and slave pulses, can be controlled by the insertion angle of the acousto-optic element and the double step losses of the signal generator. These theoretical results have been verified in experiments. We obtained a maximum output power of 145 mW for the orthogonally polarized dual-wavelength double pulse laser, with π-polarization at 604 nm and σ-polarization at 607 nm. At a pulse repetition frequency (PRF) of 10 kHz, the pulse widths of the master and slave pulses are measured to be 29.6 ns and 65.4 ns, respectively.