通过单立体集成的被动腔体实现1MHz线宽VCSEL,用于高稳定性芯片级原子钟
Zhiting Tang1, Chuanlin Li1, Xuhao Zhang1
1Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, China.
Light, science & applications
|January 28, 2026
概括
我们为原子钟开发了一种新的垂直腔表面发射激光器 (VCSEL). 这种紧的VCSEL实现了~1MHz的狭窄线宽,改善了量子传感器和引用的频率稳定性.
科学领域:
- 光子学和量子技术的使用.
- 激光物理与工程 激光物理与工程
背景情况:
- 传统的垂直空腔表面发射激光器 (VCSEL) 由于空腔长短和自发发射,导致宽线宽,对精密应用有局限性.
- 窄线宽激光器对于芯片级原子钟和量子传感器至关重要,但在紧的VCSEL中实现这一目标仍然是一个挑战.
研究的目的:
- 为了证明一个具有内在线宽压缩的单立体集成VCSEL,以提高频率稳定性.
- 开发一个适合下一代量子启用频率参考和传感平台的VCSEL架构.
主要方法:
- 设计和制造了一个VCSEL与相邻的被动腔,以延长光子寿命和抑制不必要的模式.
- 描述了VCSEL的光学性能,包括线宽,单模式运行,侧模式抑制比 (SMSR) 和极化抑制比 (OPSR).
- 将VCSEL集成到蒸汽电池原子钟中,以评估其在现实应用中的性能.
主要成果:
- 在没有外部反的情况下,在D1线 (894.6nm) 上实现了大约1MHz的内在线宽压缩.
- 在广泛的电流和温度范围内,经过SMSR> 35dB和OPSR> 25dB的强大的单模式操作.
- 观察到光束差距大约为7°.
- 集成的VCSEL使原子钟的频率稳定性达到1.89 × 10-12 τ-1/2.
结论:
- 具有嵌入式被动空腔的新型VCSEL架构成功实现了显著的线宽减少.
- 展示的VCSEL是芯片级原子钟和量子传感器的紧,可扩展和高性能解决方案.
- 这项技术为下一代便携式和强大的量子支持设备铺平了道路.
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