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首页> 外文期刊>Applied optics >Low-repetition-rate, high-energy, twin-pulse, passively mode locked Y_(b)~(3+)-doped fiber laser
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Low-repetition-rate, high-energy, twin-pulse, passively mode locked Y_(b)~(3+)-doped fiber laser

机译：低重复频率，高能量，双脉冲，被动锁模Y_（b）〜（3+）掺杂光纤激光器

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摘要

We report an all-normal-dispersion, low-repetition-rate, high-energy, twin-pulse, passively mode locked ytterbium-doped fiber laser. The mode-locking mechanism of the laser is based on nonlinear polarization evolution and strong pulse shaping with a cascade long-period fiber grating bandpass filtering in a highly chirped pulse. The laser generates a highly stable twin-pulse group with 248 ps and 296 ps duration simultaneously and maximum pulse energy of 26.8 nJ--each pulse at a 2.5445 MHz repetition rate. Energy quantization is observed, which demonstrates the nonparabolic nature of these pulses. The laser can also work in third-harmonic mode locking with 17.8 nJ energy (at a repetition rate of 7.65 MHz and pulse width of 780 ps).
机译：我们报告了全正态色散，低重复频率，高能量，双脉冲，被动模式锁定locked掺杂光纤激光器。激光器的锁模机制基于非线性偏振演化和强脉冲整形，并在高度cascade脉冲中采用级联长周期光纤光栅带通滤波。激光产生一个高度稳定的双脉冲群，同时具有248 ps和296 ps的持续时间，最大脉冲能量为26.8 nJ-每个脉冲的重复频率为2.5445 MHz。观察到能量量化，这证明了这些脉冲的非抛物线性质。激光器还可以以17.8 nJ的能量（在7.65 MHz的重复频率和780 ps的脉冲宽度下）以三次谐波模式锁定工作。

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