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基于液晶极化格子的超紧和高精度差分检测方法,用于微型原子磁力计的微型原子磁力计

Zhibo Cui^1,2,3,4, Yuhao Wang^1,2,3,4, Ying Liu^1,2,3,4,5

¹Key Laboratory of Ultra-Weak Magnetic Field Measurement Technology, Ministry of Education, School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China.

Nanophotonics (Berlin, Germany)

|December 16, 2024

概括

这项研究引入了原子磁表的紧液晶极化格子,大大减少了传感器的大小. 这项创新实现了高磁敏度,并使微型,高度灵敏的磁场测量设备成为可能.

科学领域:

原子磁力测量是一种原子磁力测量.
光学和光子学在光学和光子学.
材料科学材料科学材料科学

背景情况:

原子磁表 (AM) 是使用气蒸气的高度敏感的磁场传感器.
传统的AM使用了重的极化光学,限制了小型化.
差异检测对于降低AMS中的噪音至关重要.

研究的目的:

为原子磁力计开发一个微型差分检测系统.
用一个紧的液晶极化格子 (LCPG) 取代重的极化束分割器.
为了增强磁场灵敏度并减少传感器的整体足迹.

主要方法:

液晶极化格子 (LCPG) 结合液晶四分之一波板的制造.
在原子磁力计中实现LCPG用于差分检测.
测量磁场强度通过强度的两个衍射束.

主要成果:

该LCPG显示了高的循环极化灭绝率 (3,656) 和衍射效率 (99%).
基于LCPG的方法实现了1.48 × 10-7 rad 的角分辨率.
原子磁力计的平均磁敏度为13.8 fT/Hz^1/2.
与基于PBS的方法相比,磁力计响应系数有13%的提高.

结论:

基于LCPG的差分检测为小型化原子磁力计提供了一个实用的解决方案.
紧的光学设计允许在微型制造蒸汽电池上进行潜在的集成.
这种方法显著推进了高度灵敏,小尺寸的磁场传感器的开发.

关键词:

原子磁力计 (AMs) 的使用不同的检测差异检测.液晶极化格子 (LCPG) 是一种液晶极化格子.光学旋转角度的角度是什么?

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