Ma Chunyang, Luo Mulin, Zhang Han, Tang Pinghua, Liu Jun
Opt Lett. 2021 Oct 1;46(19):4773-4776. doi: 10.1364/OL.437669.
We investigate the spectral filtering effect on the mid-infrared ultrafast -doped ZBLAN fiber laser based on nonlinear polarization evolution (NPE). A broad wavelength tuning range from 2720 nm to 2800 nm is achieved using a diffraction grating as the narrowband filter. Furthermore, numerical simulations are also carried out so that, by inserting a highly nonlinear fiber combined with an appropriate spectral filter in the laser system, a 329 nm ultra-broadband spectrum with a Fourier transform limit pulse as short as 47 fs can be achieved. Our results are conducive to understanding the spectral filtering effect on the lasing performance of mid-infrared ultrafast fiber lasers.
我们基于非线性偏振演化（NPE）研究了光谱滤波对中红外超快掺杂ZBLAN光纤激光器的影响。使用衍射光栅作为窄带滤波器，实现了从2720纳米到2800纳米的宽波长调谐范围。此外，还进行了数值模拟，通过在激光系统中插入高非线性光纤并结合适当的光谱滤波器，可以实现具有傅里叶变换极限脉冲短至47飞秒的329纳米超宽带光谱。我们的结果有助于理解光谱滤波对中红外超快光纤激光器激光性能的影响。
