We report the results of our theoretical investigation into the impact of the Q-switch rise time on three key parameters of the output pulses in an actively Q-switched fiber laser, namely the multipeak phenomenon, pulse energy, and pulse peak power. Our investigation is conducted over a Q-switch time range of up to 12 times the cavity round-trip time (τ round ). We show that when a longer Q-switch rise time is applied to the cavity, a trade-off exists between multipeak phenomenon suppression and pulse energy maintenance. The results show that the Q-switch rise time (τ rise ) for the efficient suppression of multipeak phenomenon without loss of pulse energy varies, depending on the cavity parameters. In an exemplary, actively Q-switched fiber laser operating under the condition of a repetition rate of 15 kHz, τ rise is estimated to be approximately five times larger than τ round .

中文翻译：

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有源Q开关掺-光纤激光器中Q开关上升时间对输出脉冲特性影响的数值研究

我们报告了我们对Q开关上升时间对有源Q开关光纤激光器中输出脉冲的三个关键参数的影响进行理论研究的结果，即多峰现象，脉冲能量和脉冲峰值功率。我们的研究是在Q开关时间范围内进行的，该时间范围是腔体往返时间（τround）的12倍。我们表明，将更长的Q开关上升时间应用于腔体时，在多峰现象抑制和脉冲能量维持之间存在折衷。结果表明，根据空腔参数的不同，用于有效抑制多峰现象而又不损失脉冲能量的Q开关上升时间（τ上升）会有所不同。在示例性主动调Q光纤激光器中，其重复频率为15 kHz，