We report an orthogonal polarization dual-wavelength Nd:GdVO₄ crystal laser with 880 nm LD directly pumping. By adjusting the tilting angle of an uncoated BK7 glass plate inserted in the cavity to change the transmittance of two polarization emission to balance the gain and cavity losses of these emission, an orthogonal polarization dual-wavelength laser at 1340.9 nm (π-polarization) and 1344.4 nm (σ-polarization) is obtained. To the best of our knowledge, this is the first demonstration of orthogonal polarization dual-wavelength lasers in Nd:GdVO₄ crystal at 1.3 μm. With an incident pump power of 13.9 W, the total output power of the dual-wavelength laser is about 1.18 W, with individual power of 0.45 W and 0.68 W at 1340.9 and 1344.4 nm respectively. Such dual-wavelength laser is potential to apply for terahertz emission with nonlinear difference frequency technology.

我们报道了一种具有 880 nm LD 直接泵浦的正交偏振双波长 Nd：GdVO₄ 晶体激光器。通过调整插入腔体中的无涂层 BK7 玻璃板的倾斜角度，改变两个偏振发射的透射率，以平衡这些发射的增益和腔体损耗，获得了 1340.9 nm（π偏振）和 1344.4 nm（σ偏振）的正交偏振双波长激光器。据我们所知，这是在 1.3 μm 的 Nd：GdVO₄ 晶体中首次演示正交偏振双波长激光器。入射泵浦功率为 13.9 W，双波长激光器的总输出功率约为 1.18 W，在 1340.9 和 1344.4 nm 处的单个功率分别为 0.45 W 和 0.68 W。这种双波长激光器有可能应用于非线性差频技术的太赫兹发射。