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| 激光自外差相干测量中分布反馈半导体激光器电流调谐非线性的补偿方法 | |
| 引用本文： | 安颖,杜振辉,刘景旺,徐可欣. 激光自外差相干测量中分布反馈半导体激光器电流调谐非线性的补偿方法[J]. 物理学报, 2012, 61(3): 34207-034207 |
| 作者姓名： | 安颖 杜振辉 刘景旺 徐可欣 |
| 作者单位： | 1. 天津人学精密测试技术及仪器国家重点实验室,天津300072 河北联合大学信息工程学院,唐山063009 2. 天津人学精密测试技术及仪器国家重点实验室,天津,300072 3. 天津人学精密测试技术及仪器国家重点实验室,天津300072 北华航天工业学院基础部,廊坊065000 |
| 基金项目： | 国家自然科学基金重点项目(批准号: 60938002)、精密测试技术及仪器国家重点实验室探索课题 (批准号: PILT1107)、河北省廊坊市科技支撑计划项目(批准号: 2010011029)和 北华航天工业学院科研基金项目(批准号: KY-2010-16)资助的课题. |
| 摘 要： | 半导体激光器的电流调谐非线性对自外差相干测量的精度影响很大.研究了分布反馈半导体(DFB) 激光器的电流调谐特性,据此提出一种数学模型补偿方法.利用已知光程差下的差拍频率,建立了动态调频 系数的数学模型.以此模型对DFB激光器的电流调谐非线性进行补偿,可以将差拍信号频率预测值的相对误差 减小约3%,提高了系统的测量精度.数学模型补偿方法简化了测量系统的结构,适用于高精度的电流调谐 激光在线测量系统. |
| 关 键 词： | 自外差相干测量 分布反馈半导体激光器 调谐非线性 数学模型补偿 |
| 收稿时间： | 2011-07-11 |
A method to compensate the tuned nonlinearity of DFB diode laser in the laser self-heterodyne coherent measuring system |
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| An Ying,Du Zhen-Hui,Liu Jing-Wang and Xu Ke-Xin. A method to compensate the tuned nonlinearity of DFB diode laser in the laser self-heterodyne coherent measuring system[J]. Acta Physica Sinica, 2012, 61(3): 34207-034207 | |
| Authors: | An Ying Du Zhen-Hui Liu Jing-Wang Xu Ke-Xin |
| Affiliation: | State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China; College of Information Engineering, Hebei United University, Tangshan 063009, China;State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China;State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China; North China Institute of Aerospace Engineering, Langfang 065000, China;State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China |
| Abstract: | The measuring accuracy of self-heterodyne coherent measuring system can be deteriorated by the tuning nonlinearity of the diode laser with injection current. The tuning characteristics of a DFB laser were analyzed, and a mathematical model for compensating Mach-Zehnder interferometer based self-heterodyne system was presented. The dynamic frequency modulation coefficient of the model was built by prior beat frequency of foregone optical path difference. The relative error of predicted beat frequency is reduced about 3%. This method could simplify the setup of the system, and is especially suited for online tunable laser measurement system. |
| Keywords: | self-heterodyne coherent measure DFB diode laser tuned nonlinearity mathematical model compensate |
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