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以半经典密度矩阵理论和分子振动弛豫理论为基础,研究添加适当比例缓冲气体与适当减小波导芯径对光抽运太赫兹激光器输出光强的影响.计算结果表明,加入适当比例缓冲气体或适当减小波导的芯径均能提高太赫兹激光的输出光强;同时优化两个参数能进一步提高抽运激光能量转化为太赫兹激光能量的效率,延长工作腔中的有效激活区,延缓抽运饱和效应的出现,提高太赫兹激光输出光强.该研究对提高光抽运太赫兹激光器的能量转化效率、提高光抽运太赫兹激光器的输出功率及实现光抽运太赫兹激光器的小型化有重要的指导意义.
Based on the semi-classical density matrix theory and the molecular vibration relaxation theory, the influence of the appropriate proportion of buffer gas and the appropriate reduction of the waveguide core diameter on the output light intensity of the optical pumping terahertz laser is studied. The calculated results show that adding appropriate proportion of buffer gas Or properly reducing the core diameter of the waveguide can increase the output light intensity of the terahertz laser; while optimizing the two parameters can further improve the efficiency of pumping laser energy into the energy of terahertz laser, prolong the effective activation region in the working chamber, delay Pumping saturation effect and improve the terahertz laser output light intensity.This study is to improve the energy conversion efficiency of the optical pumping terahertz laser to improve the output power of the optical pumping terahertz laser and to achieve the small size of the optical pumping terahertz laser Has important guiding significance.