Switchable single and dual-wavelength single longitudinal mode Pr:YLF laser at 607nm and 604nm

This letter presents a orthogonally polarized dual-wavelength single-longitudinal-mode Pr:YLF laser output at 607 nm and 604 nm by using combine F-P etalons. The experimental results shows that switchable single and dual-wavelength single-longitudinal mode laser output can be realized by selectively combining the F-P etalons with 0.3 mm and 1mm thickness. We obtained the maximum orthogonally polarized dual-wavelength single longitudinal mode laser output power at 604 nm and 607 nm is reaches 32 mW and the measured dual-wavelength single longitudinal mode laser spectral line-widths are 174.4 MHz and 102.2 MHz. The maximum single wavelength single longitudinal mode laser output at 607 nm and 604 nm are 201 mW and 81 mW and the measured single wavelength single longitudinal mode laser spectral line-widths are 52.3 MHz and 111.3 MHz, respectively. To the best of our knowledge, it is the first time to investigate the orthogonally polarized dual-wavelength single longitudinal mode CW Pr:YLF laser.