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高功率光纤激光器与周期性极化非线性晶体相结合的频率转换技术,是实现可见及紫外波段激光输出的有效技术手段。本文以线偏振输出的连续波全光纤化激光振荡器为基频光源,以5%(摩尔分数)氧化镁掺杂的周期性极化铌酸锂(PPMgO∶LN)为倍频晶体,进行了单通倍频的实验研究,测量并分析了PPMgO∶LN的温度调谐特性。控制晶体温度为26.9℃,在基频光功率为8.05W时,实现了17.84%的谐波转换效率,对应的倍频绿光功率为1.437W。
High-power fiber laser with periodic polarization nonlinear crystal combination of frequency conversion technology is to achieve visible and ultraviolet laser output an effective technical means. In this paper, a continuous wave all-fiber laser oscillator with linear polarization output is used as the fundamental frequency light source, and periodically poled lithium niobate (PPMgO: LN) doped with 5% (mole fraction) Single-pass multiplier experimental study measured and analyzed the temperature tuning characteristics of PPMgO: LN. The control crystal temperature is 26.9 ℃. When the fundamental optical power is 8.05W, the harmonic conversion efficiency of 17.84% is achieved, and the corresponding frequency doubling green power is 1.437W.