We report the high repetition frequency dual-wavelength pulse laser output of Pr3+:YLF at 604 and 639 nm. We discuss the relationship between the threshold powers of the dual-wavelength laser with the insertion of a Fabry-Perot etalon and numerically solve the corresponding four-level rate equations. Based on the results, we designed and conducted the experimental research. Then we obtained dual-wavelength pulse laser output at different repetition frequencies. When the repetition frequency is 40 kHz and the maximum absorbed pump power is 2.723 W, the output power at 604 and 639 nm are 27 and 25 mW, respectively. This study provides a simplest method for direct output of dual-wavelength visible pulsed laser.
Green-red (500nm-660nm) laser is widely used in laser projection, laser color display, lithography and laser communication. It is a relatively simple and effective method to obtain the green, orange and red laser from Pr3+:YLF crystal pumped by blue laser diode (LD). In this paper, the influence of output mirror with different transmittance and different curvature radius on the output power of green laser is analyzed. The green laser is achieved with the maximum output power of 960mW at 522nm, when the full pumping current is 2.269A, the absorption power of a-cut Pr3+:YLF crystal is 7.44W.
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