论文部分内容阅读
全正色散被动锁模光纤激光器以其能产生高能量、高线性啁啾耗散孤子脉冲而备受关注。全正色散耗散孤子产生的机理是激光腔内多种效应,包括增益、损耗、增益饱和、非线性和滤波等综合作用的结果。研究了全正色散耗散孤子光纤激光器中有无滤波器和滤波器带宽对激光输出性能的影响。通过数值模拟发现,加入带通滤波器后输出耗散孤子脉冲的时域脉宽较无滤波器时变窄,对应的光谱半峰全宽变宽,脉冲稳定锁模所需的时间减小。脉冲的峰值功率会随着滤波器带宽减小而增加,脉冲能量则在一定带宽变化范围内保持不变,但是过窄带宽的滤波器会带来额外的损耗,从而使得脉冲能量快速下降。这些结论为设计搭建高能超快全正色散耗散孤子光纤激光器提供理论参考。
All-passively mode-locked passively mode-locked fiber lasers have drawn much attention for their ability to generate high energy, highly linearly chirped dissipative soliton pulses. The mechanism of full-dispersion dispersive soliton is the result of a variety of effects in the laser cavity, including gain, loss, gain saturation, nonlinearity and filtering. The effects of filter bandwidth and filter bandwidth on laser output performance in all-dispersion PD soliton fiber lasers are investigated. The numerical simulation shows that the time-domain pulse width of the dissipative soliton pulse output after band-pass filter is added is narrower than that without filter, and the corresponding full-width half-width spectrum is broadened. The peak power of the pulse increases as the filter bandwidth decreases, and the pulse energy remains constant over a range of bandwidth variations. However, narrow bandwidth filters can introduce additional losses, resulting in a rapid decrease in pulse energy. These conclusions provide a theoretical reference for the design and construction of high energy and ultrafast full-dispersion dissipative soliton fiber lasers.