光子学报, 2011, 40 (2): 174, 网络出版: 2011-03-08
低损耗大模面积W型布喇格光纤
Low-loss Large Mode Area Bragg Fiber with a W-shape Core
布喇格光纤 大模面积 反共振反射型光波导 Bragg Fiber(BF) Large mode area Anti-Resonance Reflecting Optical Waveguide(ARROW)
摘要
通过有限元法建立模型,讨论了布喇格光纤设计参量对光子带隙的影响,发现当增加掺锗玻璃环的厚度或折射率时,会使带隙移向长波.通过在紧邻纤芯处施加一层掺氟低折射率玻璃,设计了一种大模面积W型布喇格光纤.计算表明:W型布喇格光纤可以有效减小限制损耗,提高光纤的抗弯曲能力.本文设计的布喇格光纤的纤芯直径为30 μm,在波长1.06 μm限制损耗约为0.1 dB/km,且维持单一横模传输.
Abstract
The influence of Bragg fiber design parameters on photonic bandgap was discussed via the finite element method. The theoretical results show that the bandgap move to long wavelength when the thickness or the refractive index of the Ge-doped layers increases. A novel W-shape-core Bragg fiber was firstly proposed by introducing a F-doped low index layer adjacent of fiber core. The calculation demonstrates the W-shape-core Bragg fiber can reduce the confinement loss and improve the bending-resistant ability effectively. A W-shape-core Bragg fiber was designed with a core diameter of 30 μm, which has a loss of 0.1 dB/km at wavelength of 1.06 μm and is proved single mode propagation theoretically.
闫培光, 赵健, 郭春雨, 赵俊清, 舒杰, 阮双琛, 李相, 陈胜平. 低损耗大模面积W型布喇格光纤[J]. 光子学报, 2011, 40(2): 174. YAN Pei-guang, ZHAO Jian, GUO Chun-yu, ZHAO Jun-qing, SHU Jie, RUAN Shuang-chen, LI Xiang, CHEN Sheng-ping. Low-loss Large Mode Area Bragg Fiber with a W-shape Core[J]. ACTA PHOTONICA SINICA, 2011, 40(2): 174.