光电子快报(英文版), 2018, 14 (2): 81, Published Online: Sep. 17, 2018
All-fiber mode converter based on superimposed longperiod fiber gratings
Abstract
In this paper, a novel broadband all-fiber mode converter is proposed and experimentally demonstrated. Through writ-ing a pair of superimposed long period fiber gratings (SLPFGs) in tow-mode fiber (TMF) with a CO2 laser, the mode converter can realize the conversion from LP01 to LP11 owing to the phase matching condition. Numerical and experi-mental results show that the bandwidth of this mode converter is 3 times broader than that of a single grating converter. The converter has low loss, high coupling efficiency, small size and is easy to fabricate, so it can be widely used in mode-division multiplexing.
XUE Yan-ru, BI Wei-hong, JIN Wa, TIAN Peng-fei, JIANG Peng, LIU Qiang, JIN Yun. All-fiber mode converter based on superimposed longperiod fiber gratings[J]. 光电子快报(英文版), 2018, 14(2): 81.