A power balanced orthogonally polarized dual-wavelength Ho:GdVO4 laser was demonstrated for the first time. Without inserting any other devices into the cavity, the power balanced simultaneous orthogonally polarized dual-wavelength laser at π-polarization 2048nm and σ-polarization 2062nm was successfully achieved. At the absorbed pump power of 14.2 W, the maximum total output power was 1.68 W, and the output powers of 2048nm and 2062nm were 0.81 W and 0.87 W, respectively. The interval between the two wavelengths in the orthogonally polarized dual-wavelength Ho:GdVO4 laser was nearly 14nm, corresponding to the frequency separation of 1 THz. This power balanced orthogonally polarized dual-wavelength Ho:GdVO4 laser can be applied to generate the terahertz wave.
We successfully demonstrate the stable pulse output of a diode-end-pumped Tm:YAP laser based on the longitudinal mode beating technique. Without any additional modulation elements in the cavity, the stable pulse output of a Tm:YAP laser at 1937 nm is achieved. At an absorbed pump power of 6 W, the average output power of 1.14 W is obtained with a slope efficiency of 23%, and the pulse duration is 5.3 ns with a pulse repetition frequency of 89 MHz. To the best of our knowledge, this is the first 2 µm self-pulsing solid-state laser based on the longitudinal mode beating effect.
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