{"title":"K-Rb-21Ne磁光计磁光失调的原位评估与有效抑制","authors":"Longyan Ma;Haoying Pang;Xiaohan Ge;Ye Liu;Jiale Quan;Hao Xia;Zhihong Wu;Lihong Duan;Xusheng Lei;Wei Quan","doi":"10.1109/TIM.2025.3606058","DOIUrl":null,"url":null,"abstract":"This study investigates the impact of magneto-optical misalignment on atomic spin responses in a spin-exchange relaxation-free (SERF) comagnetometer and proposes a method to measure and compensate for misalignment angles. By analyzing nuclear spin precession under varying bias magnetic field strengths, both the nuclear spin equivalent magnetic field (<inline-formula> <tex-math>$B_{n}$ </tex-math></inline-formula>) and the misalignment angle <inline-formula> <tex-math>$\\theta $ </tex-math></inline-formula> between the pump beam and the main magnetic field are extracted. To suppress the identified misalignment, a novel alignment technique based on periodic strong magnetic field pulses is introduced. This method enables rapid in situ adjustment of the pump beam direction, thereby enhancing nuclear spin self-compensation and overall system performance. Experimental validation demonstrates that the proposed approach improves the suppression of transverse magnetic field interference, with a 43.2% enhancement in magnetic response attenuation. Additionally, magneto-optical alignment optimization results in marked improvements in system stability and sensitivity: the Allan deviation at 100 s is reduced by 34%, and the inertial measurement noise at 1 Hz decreases by 43.3%, achieving a sensitivity of <inline-formula> <tex-math>$3.56\\times {10^{ - 6}}{{\\mathrm { }}^{\\circ } }/\\text {s}/\\sqrt {\\text {Hz}}$ </tex-math></inline-formula>.","PeriodicalId":13341,"journal":{"name":"IEEE Transactions on Instrumentation and Measurement","volume":"74 ","pages":"1-11"},"PeriodicalIF":5.9000,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"In Situ Evaluation and Efficient Suppression of Magneto-Optical Misalignment in K–Rb–21Ne Comagnetometers\",\"authors\":\"Longyan Ma;Haoying Pang;Xiaohan Ge;Ye Liu;Jiale Quan;Hao Xia;Zhihong Wu;Lihong Duan;Xusheng Lei;Wei Quan\",\"doi\":\"10.1109/TIM.2025.3606058\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This study investigates the impact of magneto-optical misalignment on atomic spin responses in a spin-exchange relaxation-free (SERF) comagnetometer and proposes a method to measure and compensate for misalignment angles. By analyzing nuclear spin precession under varying bias magnetic field strengths, both the nuclear spin equivalent magnetic field (<inline-formula> <tex-math>$B_{n}$ </tex-math></inline-formula>) and the misalignment angle <inline-formula> <tex-math>$\\\\theta $ </tex-math></inline-formula> between the pump beam and the main magnetic field are extracted. To suppress the identified misalignment, a novel alignment technique based on periodic strong magnetic field pulses is introduced. This method enables rapid in situ adjustment of the pump beam direction, thereby enhancing nuclear spin self-compensation and overall system performance. Experimental validation demonstrates that the proposed approach improves the suppression of transverse magnetic field interference, with a 43.2% enhancement in magnetic response attenuation. 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引用次数: 0
摘要
本文研究了自旋交换无弛豫(SERF)磁光失调对原子自旋响应的影响,并提出了一种测量和补偿失调角的方法。通过分析不同偏置磁场强度下的核自旋进动,提取了核自旋等效磁场($B_{n}$)和泵浦光束与主磁场之间的不对中角$\theta $。为了抑制已识别的不对准,提出了一种基于周期性强磁场脉冲的对准技术。该方法可实现泵浦光束方向的快速原位调整,从而增强核自旋自补偿和整体系统性能。实验验证表明,该方法提高了对横向磁场干扰的抑制能力,抑制率为43.2% enhancement in magnetic response attenuation. Additionally, magneto-optical alignment optimization results in marked improvements in system stability and sensitivity: the Allan deviation at 100 s is reduced by 34%, and the inertial measurement noise at 1 Hz decreases by 43.3%, achieving a sensitivity of $3.56\times {10^{ - 6}}{{\mathrm { }}^{\circ } }/\text {s}/\sqrt {\text {Hz}}$ .
In Situ Evaluation and Efficient Suppression of Magneto-Optical Misalignment in K–Rb–21Ne Comagnetometers
This study investigates the impact of magneto-optical misalignment on atomic spin responses in a spin-exchange relaxation-free (SERF) comagnetometer and proposes a method to measure and compensate for misalignment angles. By analyzing nuclear spin precession under varying bias magnetic field strengths, both the nuclear spin equivalent magnetic field ($B_{n}$ ) and the misalignment angle $\theta $ between the pump beam and the main magnetic field are extracted. To suppress the identified misalignment, a novel alignment technique based on periodic strong magnetic field pulses is introduced. This method enables rapid in situ adjustment of the pump beam direction, thereby enhancing nuclear spin self-compensation and overall system performance. Experimental validation demonstrates that the proposed approach improves the suppression of transverse magnetic field interference, with a 43.2% enhancement in magnetic response attenuation. Additionally, magneto-optical alignment optimization results in marked improvements in system stability and sensitivity: the Allan deviation at 100 s is reduced by 34%, and the inertial measurement noise at 1 Hz decreases by 43.3%, achieving a sensitivity of $3.56\times {10^{ - 6}}{{\mathrm { }}^{\circ } }/\text {s}/\sqrt {\text {Hz}}$ .
期刊介绍:
Papers are sought that address innovative solutions to the development and use of electrical and electronic instruments and equipment to measure, monitor and/or record physical phenomena for the purpose of advancing measurement science, methods, functionality and applications. The scope of these papers may encompass: (1) theory, methodology, and practice of measurement; (2) design, development and evaluation of instrumentation and measurement systems and components used in generating, acquiring, conditioning and processing signals; (3) analysis, representation, display, and preservation of the information obtained from a set of measurements; and (4) scientific and technical support to establishment and maintenance of technical standards in the field of Instrumentation and Measurement.