Approach to high pulse energy emission of the self-starting mode-locked figure-9 fiber laser.
Approach to high pulse energy emission of the self-starting mode-locked figure-9 fiber laser.
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DOI：
10.1364/oe.409406
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发表时间：
2020-10
期刊：
影响因子：
3.8
通讯作者：
Dian Duan;Jie Wang;Yang Wu;Jindong Ma;Q. Mao
中科院分区：
文献类型：
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作者：
Dian Duan;Jie Wang;Yang Wu;Jindong Ma;Q. Mao
图9纤维激光器表现出色，但其输出脉冲能量的改善受激光结构设计的限制，可确保自动启动模式锁定。在本文中，我们提出并验证一种新的方法来增加自动启动图9纤维激光器的脉冲能量。通过在自动启动的图-9激光器中逐步减少线性相移并同步增加泵功率，可以增加输出脉冲能量，而激光器始终可以在单脉冲模式锁定区域中运行。使用112 MHz分散型孤子图-9纤维激光器，我们提出的方法的有效性得到了验证，并且激光输出脉冲能量已成功增加到1.4 NJ，这是提升前脉冲能量的5.6倍。包括程序控制的关节调整在内的激光器的整个自动启动模式锁定小于1s，成功率为100％以上。该方法原则上可以解决由图9激光器的自开始引起的输出脉冲能的限制。
The figure-9 fiber laser exhibits excellent performance, but improvement of its output pulse energy is restricted by the laser structure design that ensures self-starting mode-locking. In this paper, we propose and verify a novel method to increase the pulse energy of the self-starting figure-9 fiber laser. By reducing the linear phase shift step-by-step in a self-starting figure-9 laser and synchronously increasing the pump power, the output pulse energy can be increased while the laser can always operate in the single-pulse mode-locking region. Using a 112-MHz dispersion-managed soliton figure-9 fiber laser, the effectiveness of our proposed method is verified, and the laser output pulse energy has been successfully increased to 1.4 nJ, which is 5.6 times the pulse energy before the boost. The entire self-starting mode-locking of the laser including the program-controlled joint adjustment is less than 1s with 100% success rate of more than 100 tests. This method can in principle solve the limitation on the output pulse energy caused by the self-start of the figure-9 laser.