Photonics Research, 2017, 5 (3): 03000261, Published Online: Oct. 9, 2018
Polarization-maintaining few mode fiber composed of a central circular-hole and an elliptical-ring core Download: 790次
Fibers, polarization-maintaining Fiber properties Fiber design and fabrication Fiber optics communications
Abstract
We propose a novel waveguide design of a polarization-maintaining few mode fiber (PM-FMF) supporting ≥ 10 non-degenerate modes, utilizing a central circular air hole and a circumjacent elliptical-ring core. The structure endows a new degree of freedom to adjust the birefringence of all the guided modes, including the fundamental polarization mode. Numerical simulations demonstrate that, by optimizing the air hole and elliptical-ring core, a PM-FMF supporting 10 distinctive polarization modes has been achieved, and the effective index difference Δ n eff between the adjacent guided modes could be kept larger than 1.32 × 10 4 over the whole C + L band. The proposed fiber structure can be flexibly tailored to support an even larger number of modes in PM-FMF (14-mode PM-FMF has been demonstrated as an example), which can be readily applicable to a scalable mode division multiplexing system.
Jiajia Zhao, Ming Tang, Kyunghwan Oh, Zhenhua Feng, Can Zhao, Ruolin Liao, Songnian Fu, Perry Ping Shum, Deming Liu. Polarization-maintaining few mode fiber composed of a central circular-hole and an elliptical-ring core[J]. Photonics Research, 2017, 5(3): 03000261.