用于SERF原子磁力仪的DFB激光器温度控制系统 |
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引用本文: | 陈晨,秦佳男,张雪,林君,王言章. 用于SERF原子磁力仪的DFB激光器温度控制系统[J]. 红外与激光工程, 2016, 45(12): 1205004-1205004(7). DOI: 10.3788/IRLA201645.1205004 |
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作者姓名: | 陈晨 秦佳男 张雪 林君 王言章 |
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作者单位: | 1.吉林大学 仪器科学与电气工程学院,吉林 长春 130061; |
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基金项目: | 国家自然科学基金(61403160);第55批中国博士后面上基金(2014M551194);吉林省科技厅项目(20150414052GH,20140520118JH);地球信息探测仪器教育部重点实验室基本科研业务费(450060521038) |
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摘 要: | 由于分布反馈式(DFB)激光器的工作温度会影响其激射波长,降低无自旋交换弛豫(SERF)原子磁力仪的磁场测量灵敏度,以TMS320LF2812为核心控制器,采用数字比例-积分-微分(PID)控制技术,设计并研制了一种高精度、高稳定性DFB激光器温度控制系统。在硬件电路设计方面,由温度控制前向通路和温度采集后向通路组成,构成完整的闭环温度控制结构。软件设计中,采用Ziegler-Nichols工程整定方法,实现对P、I和D三个参数的整定。以中心波长为852 nm的DFB激光器为被控对象,利用该温度控制系统对其进行了温度控制实验。实验结果表明:系统的有效控温范围为5~60℃,控温精度为0.02℃,稳定时间为20 s。并且在长时间(220 min)测试中,DFB激光器工作温度稳定性优于7.910-4(RMS),为其在SERF原子磁力仪的实用化方面提供了性能保障。
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关 键 词: | 分布反馈式激光器 数字比例-积分-微分(PID)控制技术 Ziegler-Nichols工程整定方法 温度控制系统 |
收稿时间: | 2016-04-05 |
Temperature controller for DFB laser utilized in SERF atomic magnetometer |
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Affiliation: | 1.College of Instrumentation & Electrical Engineering,Jilin University,Changchun 130061,China;2.Key Laboratory for Geophysical Instrumentation of Ministry of Education,Jilin University,Changchun 130061,China |
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Abstract: | As the working temperature can affect emitting wavelength of distributed feedback(DFB) laser and reduce measurement sensitivity of magnetic field of Spin-Exchange-Relaxation-Free(SERF) atomic magnetometer, a DFB lasers' temperature controller with high-precision and high stability was designed and developed by using digital proportional-integral-differential(PID) control technology, which is based on TMS320LF2812 core controller. In terms of hardware design, the temperature controller consists of temperature control forward pathway and temperature acquisition backward pathway to form a complete closed-loop temperature control structure. In consideration of software design, the three parameters P, I and D are determined by using Ziegler-Nichols engineering setting method. Using the aforementioned temperature controller, a temperature controlling test was performed on a DFB laser with a center wavelength at 852 nm. Experimental results indicate that, the control scale is 5-60℃, the accuracy is 0.02℃, and the control procedure is 20 s. Meanwhile, the stability of working temperature is better than 7.910-4(RMS) during long term(220 min) running, which provides performance guarantee for SERF atomic magnetometer in practical application. |
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