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建立了掺铥(Tm~(3+))光纤放大器对双单频激光放大的理论模型,对比分析了前向抽运方式下,双单频放大和单频放大时泵浦功率、信号功率、受激布里渊散射(SBS)功率,以及温度情况的不同。理论仿真了Tm~(3+)离子掺杂浓度、光纤纤芯的有效面积和换热系数对双单频放大的影响。适当的掺杂浓度,可以有效地缩小放大器中光纤长度,减弱因过长的光纤对激光的损耗,还可以提高放大器的量子效率;选取较小的光纤的纤芯有效面积,可以获得较高的信号功率输出和较小的SBS功率:较小的换热系数可以降低SBS功率,从而有效抑制SBS效应。
A theoretical model of double-frequency laser amplification by a Tm ~ (3+) fiber amplifier was established. The effects of pump power, signal power, Stimulated Brillouin Scattering (SBS) power, and temperature conditions. The effects of the doping concentration of Tm ~ (3 +) ions, the effective area of the fiber core and the heat transfer coefficient on the amplification of the single-frequency signals are simulated theoretically. Appropriate doping concentration can effectively reduce the length of the optical fiber in the amplifier, reduce the loss of the laser due to the long optical fiber, and increase the quantum efficiency of the optical amplifier. By selecting the effective core area of the smaller optical fiber, a higher Signal Power Output and SBS Power Smaller: The smaller heat transfer coefficient reduces the SBS power, effectively suppressing the SBS effect.