抑制光纤检波器系统光强波动影响的解调方法

王凯; 田长栋; 施清平; 王利威; 段发阶; 张敏; 廖延彪

抑制光纤检波器系统光强波动影响的解调方法

1.
天津大学精密测试技术及仪器国家重点实验室,天津300072;
2.
清华大学集成光电子学国家重点实验室,北京100084;
3.
北京宇航系统工程研究所,北京100076

基金项目:

国家“863”计划（2006AA0AA102-03）

详细信息

作者简介:
王凯（1985- ），男，博士生，主要从事光纤干涉传感技术、测试计量技术研究。Email：tinyparadise@126.com；段发阶（1968- ），男，教授，博士生导师，博士，主要从事激光及光电测试技术、光纤传感技术研究。Email：fjduan@tju.edu.cn

王凯（1985- ），男，博士生，主要从事光纤干涉传感技术、测试计量技术研究。Email：tinyparadise@126.com；段发阶（1968- ），男，教授，博士生导师，博士，主要从事激光及光电测试技术、光纤传感技术研究。Email：fjduan@tju.edu.cn

中图分类号: TN2;TN76

Demodulation method to suppress the influence of laser intensity disturbance in optical fiber hydrophone system

1.
State Key Lab of Precision Measuring Technology驭Instruments,Tianjin University,Tianjin 300072,China;
2.
State Key Laboratory on Integrated Optoelectronics,Tsinghua University,Beijing 100084,China;
3.
Beijing Institute of Aerospace Systems Engineering,Beijing 100076,China

摘要: 基于海上油藏勘探领域的光纤检波器光电复合空分阵列系统，通过两路PGC 干涉检波信号相除以构造非线性函数，提出了一种采用查找表实现该非线性函数解调的新方法。相比传统的两路PGC 干涉检波信号线性组合的反正切解调方法，构造非线性函数解调新方案不仅可以补偿生成载波时直接调制DFB 光源带来的高频光强波动干扰，也可以抑制其他因素造成的光强随机波动给采用定常系统参数解调带来的影响。实验结果表明：内调制DFB 激光器，采用非线性函数解调方案比线性组合方案在谐波抑制方面优势明显，两者HSR 平均值相差达26.37 dB；当系统光强降低50%，非线性函数解调方案的结果HSR 平均值优于线性组合方案得到的结果，两者相差达17.53 dB。
- 光纤检波器 /
- 相位生成载波 /
- 光强波动 /
- 伴生调幅 /
- 非线性函数 /
- 查找表
Abstract: A novel demodulation method called nonlinear function scheme and realized by Lookup Table (LUT) technique was proposed in the optical fiber hydrophone array based on the spatial division multiplexing optoelectronic system for the application of oceanic oil exploration. The nonlinear function was obtained by dividing two channels of PGC interference detection signal. Compared with the traditional manner using arctangent algorithm to the linear combination of the two channels of detection signal, the nonlinear function scheme not only can compensate an effect of accompanying laser intensity modulation caused by direct alternating current injection to the DFB laser, but has the characteristic of suppressing an influence of random laser intensity disturbance on the PGC system using constant parameters to demodulate as well. Experimental results demonstrate that in the condition of directly modulating DFB laser, the nonlinear function demodulation scheme has an overwhelming superiority over the linear combination method in harmonic suppression performance and the difference of HSR mean value between the two demodulation schemes reaches 26.37 dB. When intensity in the system decreases by 50%, HSR mean value of the nonlinear function demodulation is larger than that of the linear combination and the difference reaches 17.53 dB.
- optical fiber hydrophone /
- PGC /
- laser intensity disturbance /
- accompanying laser intensity modulation /
- nonlinear function /
- LUT

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抑制光纤检波器系统光强波动影响的解调方法

Demodulation method to suppress the influence of laser intensity disturbance in optical fiber hydrophone system

计量

抑制光纤检波器系统光强波动影响的解调方法

1. 天津大学精密测试技术及仪器国家重点实验室,天津300072;

2. 清华大学集成光电子学国家重点实验室,北京100084;

3. 北京宇航系统工程研究所,北京100076

English Abstract

Demodulation method to suppress the influence of laser intensity disturbance in optical fiber hydrophone system

1. State Key Lab of Precision Measuring Technology驭Instruments,Tianjin University,Tianjin 300072,China;

2. State Key Laboratory on Integrated Optoelectronics,Tsinghua University,Beijing 100084,China;

3. Beijing Institute of Aerospace Systems Engineering,Beijing 100076,China

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目录

留言板

抑制光纤检波器系统光强波动影响的解调方法

Demodulation method to suppress the influence of laser intensity disturbance in optical fiber hydrophone system

计量

出版历程

抑制光纤检波器系统光强波动影响的解调方法

1. 天津大学 精密测试技术及仪器国家重点实验室,天津300072; 2. 清华大学 集成光电子学国家 重点实验室,北京100084; 3. 北京宇航系统工程研究所,北京100076

English Abstract

Demodulation method to suppress the influence of laser intensity disturbance in optical fiber hydrophone system

1. State Key Lab of Precision Measuring Technology驭Instruments,Tianjin University,Tianjin 300072,China; 2. State Key Laboratory on Integrated Optoelectronics,Tsinghua University,Beijing 100084,China; 3. Beijing Institute of Aerospace Systems Engineering,Beijing 100076,China

全文HTML

目录

1. 天津大学精密测试技术及仪器国家重点实验室,天津300072;

2. 清华大学集成光电子学国家重点实验室,北京100084;

3. 北京宇航系统工程研究所,北京100076

1. State Key Lab of Precision Measuring Technology驭Instruments,Tianjin University,Tianjin 300072,China;

2. State Key Laboratory on Integrated Optoelectronics,Tsinghua University,Beijing 100084,China;

3. Beijing Institute of Aerospace Systems Engineering,Beijing 100076,China