Photonics Research, 2019, 7 (11): 11001354, Published Online: Nov. 1, 2019
Design, fabrication, and characterization of a highly nonlinear few-mode fiber Download: 598次
Abstract
We present the design, fabrication, and characterization of a highly nonlinear few-mode fiber (HNL-FMF) with an intermodal nonlinear coefficient of , which to the best of our knowledge is the highest reported to date. The graded-index circular core fiber supports two mode groups (MGs) with six eigenmodes and is highly doped with germanium. This breaks the mode degeneracy within the higher-order MG, leading to different group velocities among corresponding eigenmodes. Thus, the HNL-FMF can support multiple intermodal four-wave mixing processes between the two MGs at the same time. In a proof-of-concept experiment, we demonstrate simultaneous intermodal wavelength conversions among three eigenmodes of the HNL-FMF over the C band.
Jitao Gao, Elham Nazemosadat, Chen Yang, Songnian Fu, Ming Tang, Weijun Tong, Joel Carpenter, Jochen Schröder, Magnus Karlsson, Peter A. Andrekson. Design, fabrication, and characterization of a highly nonlinear few-mode fiber[J]. Photonics Research, 2019, 7(11): 11001354.