波长可切换可调谐耗散孤子锁模掺镱光纤激光器

Wavelength switchable and tunable dissipative soliton mode-locking Yb-doped fiber laser

采用非线性偏振旋转(NPR)锁模技术,在全正色散掺镱光纤激光器中研究了波长可调谐可切换耗散孤子锁模现象。由于NPR所诱导的腔内梳状滤波效应,光纤激光器在中心波长1 042.8~1 050.2 nm以及1 040.9~1 048.1 nm处实现了波长可切换运作,可切换波长间隔分别为7.4 nm和7.2 nm,光谱宽度约为5.5 nm和2.7 nm。同时在1 042.77~1 045.33 nm之间观察到波长可调谐运作,调谐范围2.7 nm。另外在光纤激光器中还获得了稳定的双波长锁模和二阶谐波锁模。该实验的研究有利于加深人们对掺镱光纤激光器中锁模动力学行为的理解,并为多功能激光光源的设计提供了借鉴。

Wavelength switchable and tunable dissipative soliton mode-locking Yb-doped fiber laser based on nonlinear polarization rotation was studied. Due to the in-cavity comb filtering effect induced by NPR, the central wavelength of laser spectrum could switch between 1 042.8-1 050.2 nm, and 1 040.9-1 048.1 nm. The switchable wavelength intervals were 7.4 nm and 7.2 nm, respectively, and the spectral widths were about 5.5 nm and 2.7 nm. At the same time, the wavelength tunable operation was observed from 1 042.77 nm to 1 045.33 nm with the tuning range of 2.7 nm. In addition, stable dual wavelength mode locking and second harmonic mode locking were obtained in the fiber laser. The research of this experiment is helpful to deepen people’s understanding of mode-locking dynamics in Yb-doped fiber laser and provide reference for the design of multi-function laser light source.