采用基于多级级联的非线性展宽和偏移滤波的Mamyshev腔,提出了同步光谱可重叠多波长光纤激光器,该单腔环形结构解决了传统多波长激光器中增益竞争和同步输出困难的问题。通过数值仿真,实现了中心波长分别为1035,1040,1045,1050 nm的四波长脉冲的输出,每个波长的脉冲光谱宽度均为7 nm(大于相邻中心波长的间隔),峰值功率(在外部线性压缩之前)为0.9~1.0 kW,脉冲宽度约为0.28 ps。通过优化滤波器,讨论了对应的多波长输出,并分析了波长排列顺序对传输函数以及系统效率的影响。

The Mamyshev cavity based on multi-cascade nonlinear broadening and offset filtering is used to propose a synchronous spectral overlapping multi-wavelength fiber laser. The single-cavity ring structure solves the problems of gain competition and difficulty in synchronization output of traditional multi-wavelength lasers. Through numerical simulation, the output of four-wavelength pulses with central wavelengths of 1035, 1040, 1045 and 1050 nm is realized. The spectral width of each pulse is 7 nm (greater than the interval between adjacent central wavelengths), the peak power (before external linear compression) is 0.9--1.0 kW, and the pulse width is about 0.28 ps. By optimizing the filter, the corresponding multi-wavelength output is discussed, and the influence of wavelength arrangement order on transmission function and system efficiency is analyzed.