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在光纤上集成的非线性相匹配范德瓦尔斯晶体

Kaifeng Lin^1,2, Guangjie Yao^1,2, Jiahui Shao^1,2

¹State Key Lab for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing, China.

Nature materials

|January 13, 2026

概括

研究人员将扭曲相匹配的面氧化 (rBN) 片整合到光纤激光器中. 这使得高效的第二和生成和自发的参数向下转换能够实现先进的光学功能.

科学领域:

光子学和激光技术的发展
材料科学材料科学材料科学
量子光学是一种量子光学.

背景情况:

全纤维激光系统需要高光学非线性,用于经典和量子应用.
之前在光纤激光器中利用二次光学非线性方面的努力,产生了适度的转换效率.

研究的目的:

为了证明扭转相匹配的圆柱体化 (rBN) 片的全纤维集成,以增强非线性光学功能.
在集成光纤设备中实现高效的第二和生成 (SHG) 和自发参数下调转换 (SPDC).

主要方法:

在光纤端面上整合rBN片.
为了相位匹配,在本地和全球优化片间扭转角度.
使用石墨烯/rBN异构结构制造全纤维频率翻倍超快激光器.

主要成果:

实现了~4.1%的SHG转换效率.
表明SPDC的巧合率为~90.
成功设计了一种全纤维激光器,能够同时进行模式锁定和内腔SHG.

结论:

在全纤维激光器中建立了高效,二级非线性功能的新途径.
集成的rBN晶体为像光学参数振荡器和纠光子源这样的先进设备铺平了道路.

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