Department of Applied Physics and Electromagnetism, University of Valencia, Dr. Moliner 50, Burjassot 46100, Spain.
Opt Lett. 2011 May 15;36(10):1839-41. doi: 10.1364/OL.36.001839.
We present a fiber laser made in a single piece of conventional doped-core fiber that operates by combined feedback of the fundamental core mode LP((0,1)) and the high-order cladding mode LP((0,10)). The laser is an all-fiber structure that uses two fiber Bragg gratings and a long-period grating to select the modes circulating in the cavity; the laser emits at the coupling wavelength between the core mode LP((0,1)) and the counterpropagating cladding mode LP((0,10)) in the Bragg gratings. This work demonstrates the feasibility of high-order mode fiber lasers assisted by long-period gratings.
我们展示了一种由单根常规掺杂光纤制成的光纤激光器，该激光器通过基模 LP((0,1))和高阶包层模 LP((0,10))的组合反馈来工作。该激光器是一种全光纤结构，使用两个光纤布拉格光栅和一个长周期光栅来选择在腔中循环的模式；激光器在布拉格光栅中 LP((0,1))芯模和反向传播的 LP((0,10))包层模之间的耦合波长处发射。这项工作证明了长周期光栅辅助的高阶模光纤激光器的可行性。
