We demonstrate 1.37 m coherent near-infrared light generation via self-seeded parametric four-wave mixing (FWM) process in Rb atomic vapor. Two lasers (780 nm and 776 nm) in the co-propagating configuration, drive the Rb atoms from the 5S_1/2 ground state to the 5D_5/2 excited state. The parametric FWM around the 5P_3/2–5D_5/2–6P_3/2–6S_1/2–5P_3/2 transition loop is effectively established under phase matching conditions. The generated coherent light wavelength is confirmed using an optical spectrum analyzer, and the output power is investigated with the input laser frequency, power and atomic density. Consequently, a 1.37 m coherent light with the power of 27 W and the beam quality of = 1.22 and = 1.25 is obtained. An additional 795 nm laser is introduced to enhance the output power by 1.5 times through velocity-selective optical hyperfine repumping.

我们演示 1.37 m 在 Rb 原子蒸气中通过自种参量四波混合 (FWM) 过程产生相干近红外光。两个激光（780 nm 和 776 nm）在共同传播配置中，将 Rb 原子从 5S _1/2基态驱动到 5D _5/2激发态。围绕 5P _3/2 –5D _5/2 –6P _3/2 –6S _1/2 –5P _3/2转换环路的参数 FWM在相位匹配条件下有效建立。使用光谱分析仪确认产生的相干光波长，并用输入激光频率、功率和原子密度研究输出功率。因此，一个 1.37m 功率为 27 的相干光 W 和光束质量= 1.22 和= 1.25。引入额外的 795 nm 激光，通过速度选择性光学超精细再泵浦将输出功率提高 1.5 倍。