Beyond Two-Octave Coherent OAM Supercontinuum Generation in Air-Core As2S3 Ring Fiber

IEEE Access

Changjing Bao¹  Yongxiong Ren¹  Hao Huang¹  Zhongqi Pan²  Jicong Jiang³  Hao Zhang³  Yuxi Fang³  Yang Yue³  Wenpu Geng³  Zhi Wang³  Yingning Wang³ 

[1] Department of Electrical Engineering, University of Southern California, Los Angeles, CA, USA;Department of Electrical and Computer Engineering, University of Louisiana at Lafayette, Lafayette, LA, USA;Institute of Modern Optics, Nankai University, Tianjin, China;

关键词: Supercontinuum generation;    optical vortex;    nonlinear optics;    ring fiber;   

DOI  :  10.1109/ACCESS.2020.2996666

来源: DOAJ

【 摘 要 】

In this work, we designed and simulated a novel air-core As₂S₃ ring fiber that supports orbital angular momentum (OAM) modes. By optimizing the structure parameters of the designed fiber to effectively tailor its chromatic dispersion, a near-zero flat dispersion profile with a total of <; ±30 ps/nm/km variation over 3380-nm bandwidth from 2025 nm to 5405 nm is achieved for OAM_1,1 mode. After launching a 100-fs 70-kW hyperbolic secant pulse into an 8-mm air-core As₂S₃ ring fiber, a light-carrying OAM supercontinuum is numerically formed beyond two-octave range, covering 5717nm bandwidth from 1182 nm to 6897 nm at -30dB. Furthermore, the generated supercontinuum is highly coherent across the whole spectral range. This can serve as an effective manner to expand the spectral coverage of the OAM beams for various applications.

【 授权许可】

Unknown