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角抽运能够避免使用抽运光高透激光高反的双色镜,并且对于低掺杂浓度的激光晶体仍然具有可以接受的吸收效率,因此该抽运方案适合辐射平衡激光器(RBL)较为苛刻的抽运要求。为确保抽运光不会从增益介质的角边泄漏,对角抽运方案中的晶体宽度给出了进一步的优化公式。在992.8 nm抽运光波长下,针对用于辐射平衡激光器的掺杂原子数分数为5%的Yb:KGW激光晶体,利用光线追迹法分别对不使用和使用高温熔合技术的两种角抽运设计方案进行了数值模拟计算。根据抽运吸收效率和均匀性等设计要求,两种角抽运方案中最佳入射角度均为45°,最佳抽运全反射次数值均为1,但是使用高温熔合技术比不使用该技术会使抽运效率提高约20%。
Angular pumping avoids the use of bimodal mirrors with a pump-beam, high-pass-laser, and high-pass, and still has acceptable absorption efficiency for low-doping concentrations of laser crystals, so the pumping scheme is more demanding for a radiation balanced laser (RBL) Pumping requirements. To ensure that the pump light does not leak from the edge of the gain medium, a further optimization formula is given for the crystal width in the diagonal pumped solution. For the Yb: KGW laser crystal with 5% doping number of atoms for the radiation balance laser at 992.8 nm pumping wavelength, two kinds of angle pumping Transportation design scheme for numerical simulation. According to the design requirements of pumping absorption efficiency and uniformity, the best angle of incidence for both types of angular pumping schemes is 45 °, and the optimal number of total reflection times is 1, but the use of high-temperature fusion technology than the use of the technology Pumping efficiency will increase by about 20%.