1. Over-Two-Octave Supercontinuum Generation of Light-Carrying Orbital Angular Momentum in Germania-Doped Ring-Core Fiber.
- Author
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Yang, Jian, Wang, Yingning, Fang, Yuxi, Geng, Wenpu, Zhao, Wenqian, Bao, Changjing, Ren, Yongxiong, Wang, Zhi, Liu, Yange, Pan, Zhongqi, and Yue, Yang
- Subjects
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SUPERCONTINUUM generation , *ANGULAR momentum (Mechanics) , *FIBERS , *PHOTONIC crystal fibers , *NONLINEAR optics - Abstract
In this paper, we design a silica-cladded Germania-doped ring-core fiber (RCF) that supports orbital angular momentum (OAM) modes. By optimizing the fiber structure parameters, the RCF possesses a near-zero flat dispersion with a total variation of <±30 ps/nm/km over 1770 nm bandwidth from 1040 to 2810 nm for the OAM1,1 mode. A beyond-two-octave supercontinuum spectrum of the OAM1,1 mode is generated numerically by launching a 40 fs 120 kW pulse train centered at 1400 nm into a 12 cm long designed 50 mol% Ge-doped fiber, which covers 2130 nm bandwidth from 630 nm to 2760 nm at −40 dB of power level. This design can serve as an efficient way to extend the spectral coverage of beams carrying OAM modes for various applications. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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