Spectrally U-shaped profile of beam propagation factor in all-solid photonic bandgap fiber

• 作者: Xiao Chen Liangjin Huang Yi An Huan Yang Zhiping Yan Yisha Chen Xiaoming Xi Zhiyong Pan Pu Zhou
• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2022,（1）
• 所属期刊栏目: Fiber Optics and Optical Communications
• 页码范围: 17-22
• 页数: 6页
• 语种: 英文
• DOI: 10.3788/COL202220.010602

摘要

We found the beam quality factor M2 of the fundamental mode as a function of wavelength is U-shaped in the working photonic bandgap[PBG]of an all-solid PBG fiber[AS-PBGF]for the first time,to the best of our knowledge,and our sim-ulation results also match well with the phenomenon.The normal band that is near the high-frequency edge of the third PBG integrates the lowest M2 and single-mode operation simultaneously,while the other two edge regions suffer from anoma-lous variation of M2 versus wavelength.The general applicability of this finding can be further extended to other PBGs and also other representative structures in the AS-PBGF field.