Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei 230026, China.
Opt Lett. 2013 Mar 1;38(5):667-9. doi: 10.1364/OL.38.000667.
We report a fiber laser design that is capable of producing switchable transverse modes through wavelength tuning. The transverse mode switching is realized by exploiting the particular transverse mode-wavelength association characteristics of the few-mode fiber Bragg grating. Different transverse mode outputs with high spatial mode quality can be obtained by adjusting the oscillating wavelength with a tunable filter within the fiber laser cavity. For each of the spatial mode outputs, the laser operates at the corresponding single wavelength with narrow linewidth. Through adding polarization controllers in the laser cavity, output modes with cylindrical vector polarization are also realized.
我们报告了一种光纤激光器设计，该设计能够通过波长调谐产生可切换的横模。横模切换是通过利用少模光纤布拉格光栅的特殊横模-波长关联特性来实现的。通过在光纤激光器腔内调整可调滤波器，可以调节振荡波长，从而获得具有高空间模式质量的不同横模输出。对于每个空间模式输出，激光在相应的单波长下以窄线宽运行。通过在激光腔内添加偏振控制器，还实现了具有圆柱矢量偏振的输出模式。
