具有方形模式和顶帽强度分布的自由形式光纤
Rafal Kasztelanic1,2, Hue Thi Nguyen2, Dariusz Pysz2
1Faculty of Physics, University of Warsaw, Pasteur 5, Warsaw, 02-093, Poland.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|June 28, 2024
概括
研究人员开发了一种新的纳米结构光纤,其正方形核心用于单模光导. 这种纤维即使在曲时也保持高模式纯度,证明了它对先进光子应用的潜力.
科学领域:
- 光子学和光学工程 光子学和光学工程
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
背景情况:
- 单模光纤对于各种光子应用至关重要,但实现曲不敏感性和特定强度配置文件仍然具有挑战性.
- 传统的纤维制造方法往往难以创建用于高级模式控制所需的复杂核心结构.
研究的目的:
- 开发一种曲诱导的有效单模纤维,具有方形截面和平面顶帽强度分布.
- 通过 Femtosecond 激光切除利用核心拓纳米结构,用于精确的纤维制造.
- 为了证明纳米结构纤维用于可控光传播的可行性.
主要方法:
- 使用秒激光切除,制造出的纳米结构纤维.
- 核心设计涉及5419个和化纳米棒 (430nm直径) 在六角格子中.
- 使用内部开发的蒙特卡洛算法来优化杆分布,以实现目标模式和强度配置.
- 实验验证1030nm波长的模式纯度,曲性能和引导损失.
主要成果:
- 成功开发了一种具有24微米核心的二氧化纳米结构纤维.
- 在曲下 (20厘米半径) 在1030nm时,有效地证明了单模式操作,具有96%的模式纯度.
- 测量了360μm2的模式面积,数值孔径为0.03,和0.07 dBm-1.1的低总损失.
结论:
- 开发的纳米结构纤维使曲诱导单模式运行具有理想的平面顶帽强度配置.
- 五秒激光切除和核心拓纳米结构是制造先进光纤的有效技术.
- 这种纤维在模式纯度和低损耗方面表现出极佳的性能,使其适用于苛刻的光子应用.
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