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Realizing high adjustability of bandwidth and energy of output pulse in a self-similar femtosecond fiber laser
Optical Fiber Technology ( IF 2.7 ) Pub Date : 2020-12-22 , DOI: 10.1016/j.yofte.2020.102438
Atoosa Sadat Arabanian , Mahdi Salmanian

Numerical solving of nonlinear Schrödinger equation is performed for a self-similar femtosecond fiber laser cavity in order to investigate the effect of its key parameters (e.g., output coupling rate, net dispersion of cavity, and modulation depth) on the energy and the spectral bandwidth of output pulse in the stable mode-locking state. The calculations indicate that by decreasing the output coupling rate from 0.8 to 0.1, the output pulse bandwidth increases while the maximum output energy can be achieved for the output coupling rate value of about 0.5. On the other hand, the decrease in net cavity dispersion due to the increase of negative GVD of the pulse compressor will increase the bandwidth and energy of the output pulse. Finally, the optimal net cavity dispersion is determined for which the widest adjustment range of modulation depth is obtained; this leads to a broad adjustability range for energy and spectral bandwidth of the output pulse. Then, the design and fabrication of a self-similar femtosecond fiber laser with a high adjustability range for bandwidth and energy of output pulse is realized according to the simulation results.



中文翻译:

在自相似飞秒光纤激光器中实现带宽和输出脉冲能量的高度可调

为了研究飞秒光纤飞秒腔的非线性Schrödinger方程的数值解,以研究其关键参数(例如输出耦合率,腔净色散和调制深度)对能量和光谱带宽的影响稳定锁模状态下的输出脉冲数。计算表明,通过将输出耦合率从0.8降低到0.1,输出脉冲带宽会增加,而对于大约0.5的输出耦合率值,则可以获得最大输出能量。另一方面,由于脉冲压缩器的负GVD增大而导致净腔色散减小,这将增加输出脉冲的带宽和能量。最后,确定最佳的净腔色散,以获得最佳的调制深度调节范围;这导致输出脉冲的能量和频谱带宽的可调范围宽。然后,根据仿真结果,实现了对带宽和输出脉冲能量的可调范围大的自相似飞秒光纤激光器的设计与制造。

更新日期:2020-12-22
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