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

Author Affiliations
1 Wuhan National Laboratory for Optoelectronics, and School of Optics and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
2 Photonics Laboratory, Department of Microtechnology and Nanoscience, Chalmers University of Technology, Gothenburg 41296, Sweden
3 State Key Laboratory of Optical Fiber and Cable Manufacture Technology, Yangtze Optical Fiber and Cable Joint Stock Limited Company (YOFC), Wuhan 430073, China
4 School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia
Abstract
We present the design, fabrication, and characterization of a highly nonlinear few-mode fiber (HNL-FMF) with an intermodal nonlinear coefficient of 2.8 (W·km) 1, 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.

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