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Numerical analysis of the transmission function of the NPE-based saturable absorber in a mode-locked fiber laser
Journal of the Optical Society of America B ( IF 1.9 ) Pub Date : 2020-08-20 , DOI: 10.1364/josab.396274
A. E. Bednyakova , D. S. Kharenko , A. P. Yarovikov

We report on a detailed investigation of two approaches to the modeling of the nonlinear polarization evolution (NPE) effect, forming part of an effective artificial saturable absorber. Comparison of scalar and hybrid models was performed on an example of an all fiber laser, generating highly chirped dissipative solitons at 1.55 µm. It was shown that distributed action of this type of saturable absorber in the specially designed cavity can be reduced to the point action and described in terms of critical power, modulation depth, and phase shift of the sinusoidal transmission function. Its parabolic approximation gives a large area with less than 15% difference between the energies and durations of the pulses in the considered models. Qualitative relations between the physical cavity parameters and parameters of the transmission function have been established.

中文翻译:

NPE基饱和吸收体在锁模光纤激光器中传输函数的数值分析

我们报告了对非线性极化演化(NPE)效应建模的两种方法的详细研究,形成了有效的人工饱和吸收器的一部分。标量模型和混合模型的比较是在一个全光纤激光器的示例上进行的,它产生了1.55 µm的高度highly散的耗散孤子。结果表明,这种可饱和吸收体在专门设计的腔中的分布作用可以减小为点作用,并以临界功率,调制深度和正弦传递函数的相移来描述。在所考虑的模型中,其抛物线近似法可提供较大的面积,且脉冲的能量和持续时间之间的差异小于15%。
更新日期:2020-09-02
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