A high sensitivity and strong stability miniaturized optically-pumped magnetometer

Autor:	Zinan Wu, Yang Zhang, Mengyang He, Bokang Ren, Huimin Yue, Zhonghua Ou, Xiaojun Zhou, Yong Liu
Rok vydání:	2022
Předmět:	Physics and Astronomy (miscellaneous) General Engineering General Physics and Astronomy
Zdroj:	Japanese Journal of Applied Physics. 61:070904
ISSN:	1347-4065 0021-4922
DOI:	10.35848/1347-4065/ac748c
Popis:	In this paper, we focus on the phase noise in optically-pumped magnetometer systems and investigate its sources, and use dual-phase lock-in technique to solve the problem. The results show that the phase noise is maximum when the system operates under zero-magnetic-field condition, and the main source comes from the environment stray magnetic field. The dual-phase lock-in technique improves the phase noise rejection by a factor of 10 compared to the single-phase lock-in technique. The sensitivity of the system is 22 fT Hz−1/2 and the bandwidth is 158 Hz, which offers a favorable outlook for use in clinical settings.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::305e271a8b44575d0dd773de7a7c7d9e https://doi.org/10.35848/1347-4065/ac748c Zobrazit plný text záznamu