Hong Xiaobin, Zeng Xinglin, Li Yan, Mo Qi, Tian Yongjie, Li Wei, Liu Zhijian, Wu Jian
Appl Opt. 2016 Nov 20;55(33):9360-9364. doi: 10.1364/AO.55.009360.
In this paper, a fiber-based tunable mode rotator is proposed and demonstrated by using the few mode-polarization maintaining fiber (FM-PMF). The mode birefringence in the FM-PMF causes phase difference between two orthogonal degenerate modes. With rotating the FM-PMF segment and getting a variation of aligning angle between the injected LP (LP) mode axis and FM-PMF axis, another intended LP (LP) mode with a certain orientation can be controllably generated at the FM-PMF output.
