Magnetic-field-assisted optical fiber quantum temperature sensor with enhanced sensitivity

被引：2

作者：

Chen, Jiayao ^{[1
,2
]}

Luo, Yunhan ^{[1
,2
]}

Luo, Jiajia ^{[2
]}

Huang, Huanhuan ^{[2
]}

Cheng, Hongda ^{[2
]}

Liu, Gui-shi ^{[1
,2
]}

Chen, Lei ^{[1
,2
]}

Chen, Zhe ^{[1
,3
]}

Chen, Yaofei ^{[1
,2
]}

机构：

[1] Jinan Univ, Guangdong Prov Key Lab Opt Fiber Sensing & Commun, Guangzhou 510632, Peoples R China

[2] Jinan Univ, Dept Optoelect Engn, Guangzhou 510632, Peoples R China

[3] Jihua Lab, Foshan 528200, Peoples R China

来源：

OPTICS LETTERS | 2024年 / 49卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Color centers - Magnetic fields - Optical fibers - Silicones - Temperature sensors;

D O I：

10.1364/OL.511061

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In recent years, utilizing nitrogen -vacancy color centers in diamond for temperature sensing has drawn great attention. However, increasing the sensitivity has encountered challenges due to the intrinsic temperature -dependent energy level shift, i.e . , temperature responsivity, being limited to74 kHz/K. In this Letter, we take advantage of the magnetic field to regulate the energy level to enhance temperature sensitivity. The sensor is formed by adhering a micronsized diamond on the end face of an optical fiber, and a small magnet is mounted at a certain distance with the diamond exploiting a cured polydimethylsiloxane block as the bridge. The temperature change leads to the variation of the distance between the diamond and the magnet, thus affecting the magnetic strength felt by the diamond. This finally contributes an additional temperature -induced energy level shift, giving rise to an enhanced sensitivity. Experimental results demonstrated the proposed scheme and achieved a 4.2 -fold improvement in the temperature responsivity and a 2.1 -fold enhancement in sensitivity. Moreover, the diamond and the fiber-optic integrated structure improve the portability of the sensor. (c) 2024 Optica Publishing Group

引用

页码：1421 / 1424

页数：4

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