精密控制谐振腔获得合成孔径激光雷达信号的方法

来志; 曾晓东; 冯喆君; 曹长庆

doi:10.3788/OPE.20111907.1531

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精密控制谐振腔获得合成孔径激光雷达信号的方法

现代应用光学 | 更新时间：2020-08-12

- 精密控制谐振腔获得合成孔径激光雷达信号的方法
- Obtaining synthetic aperture ladar signal based on precisely cavity tuning
- 光学精密工程 2011年19卷第7期页码：1531-1537
- 作者机构：
  
  西安电子科技大学技术物理学院,陕西西安 710071
- 作者简介：
- 基金信息：
  
  国家863高技术研究发展计划资助项目(No.2006AA12Z144)();中央高校基本科研业务费资助项目(No.K50510050010)()
- DOI：10.3788/OPE.20111907.1531
  中图分类号： TN958.98
- 收稿日期：2010-12-27，
  
  修回日期：2011-02-15，
  
  网络出版日期：2011-07-25，
  
  纸质出版日期：2011-07-25
- 稿件说明：
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来志, 曾晓东, 冯喆君, 曹长庆. 精密控制谐振腔获得合成孔径激光雷达信号的方法[J]. 光学精密工程, 2011,19(7): 1531-1537

LAI Zhi, ZENG Xiao-dong, FENG Zhe-jun, CAO Chang-qing. Obtaining synthetic aperture ladar signal based on precisely cavity tuning[J]. Editorial Office of Optics and Precision Engineering, 2011,19(7): 1531-1537
来志, 曾晓东, 冯喆君, 曹长庆. 精密控制谐振腔获得合成孔径激光雷达信号的方法[J]. 光学精密工程, 2011,19(7): 1531-1537 DOI： 10.3788/OPE.20111907.1531.

LAI Zhi, ZENG Xiao-dong, FENG Zhe-jun, CAO Chang-qing. Obtaining synthetic aperture ladar signal based on precisely cavity tuning[J]. Editorial Office of Optics and Precision Engineering, 2011,19(7): 1531-1537 DOI： 10.3788/OPE.20111907.1531.

摘要

为获得高效的合成孔径激光雷达信号

提出一种通过精密控制谐振腔提高激光线性调频信号有效功率的方法

并描述了激光器的调频实现。首先

分析驱动信号获得其傅里叶谱

获知调腔信号有效功率低的原因在于调腔器件对信号高次谐波响应较差;通过在谐振腔驱动电路中引入了高次谐波响应模块

最终有效地减小了信号调频波形下降沿

提高了合成孔径激光雷达信号的有效功率。对所获得的调频信号性能指标进行了测试

结果表明

调频周期为1 ms时

调频带宽达到了789 MHz

信号功率中有用功率由72%提高到92%以上。

Abstract

To obtain a synthetic aperture ladar signal with a high net power rate

a novel method to obtain the Linear Frequency Modulation(LFM) laser signal was presented and the LFM laser experiment was also performed. Detailed Fourier analysis for the driving signal shows that the cavity tuning device can not response the high-order harmonics well. A high-order harmonics response module was introduced into the driving circuit of the cavity resonator to drive the piezoelectric transducer for cavity tuning

so that the trailing edge of the signal was shortened and the net power rate of the signal was improved greatly. Furthermore

the performance of obtained signal was tested and analyzed. The results show that when the FM period is 1 ms

the FM bandwidth is 789 MHz with the FM linearity better than 1.6%. Meanwhile

the net power rate of the signal is raised to 92% from 72%.

关键词

Keywords

references

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