Obtaining synthetic aperture ladar signal based on precisely cavity tuning

LAI Zhi; ZENG Xiao-dong; FENG Zhe-jun; CAO Chang-qing

doi:10.3788/OPE.20111907.1531

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Obtaining synthetic aperture ladar signal based on precisely cavity tuning

Article | 更新时间：2020-08-12

- Obtaining synthetic aperture ladar signal based on precisely cavity tuning
- Optics and Precision Engineering Vol. 19, Issue 7, Pages: 1531-1537(2011)
- 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：
- DOI：10.3788/OPE.20111907.1531
  CLC： TN958.98
- Received：27 December 2010，
  
  Revised：15 February 2011，
  
  Published Online：25 July 2011，
  
  Published：25 July 2011
- 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

CURLANDER J C,DONOUGH R N MC. Synthetic Aperture Radar: Systems and Signal Processing[M]. New York :Wiley,1991.[2] MARCUS S, COLELLA D, GREEN T J. Solid-state laser synthetic aperture radar[J]. Appl Opt.,1994,33(6):960-964.[3] BASHKANSKY M,LUCKE R L,FUNK E, et al. Two dimensional synthetic aperture imaging in the optical domain[J]. App. Opt.,2002,27(22):1983-1985.[4] LUCKE R L,RICHKARD L J. Photon-limited synthetic-aperture imaging for planet surface studies[J]. App. Opt., 2002,41(24):5084-5095.[5] 胡自强, 凌宁, 潘君骅,等. 基于PZT的非球面能动抛光盘的变形优化[J]. 光学精密工程, 2009,17(1):1-7. HU Z Q, LING N, PAN J H, et al. Optimization control of PZT actuated deformable aspheric polishing lap[J]. Opt. Precision Eng., 2009,17(1):1-7.(in Chinese)[6] BECK S M,BUCK J R,BUELL W F,et al. Synthetic-aperture imaging laser radar: laboratory demonstration and signal processing[J]. Appl. Opt. , 2005,44(35):7621-7629.[7] KOECHNER W. Solid-state Laser Engineering[M]. New York: Springer, 2006:259-263.[8] 吴大正.信号与线性系统分析[M]. 北京:高等教育出版社, 1998. WU D ZH. Signal and Linear System Analysis[M]. Beijing:Higher Education Press, 1998.(in Chinese)[9] 来志,曾晓东. 一种合成孔径激光雷达激光器带宽测量新方法[J]. 光电子激光, 2010,21(1): 9-11. LAI ZH, ZENG X D. A novel method to measure bandwidth of laser in synthetic aperture ladar[J]. Journal of Optoelectronicslaser, 2010,21(1):9-11. (in Chinese)[10] 郝二娟,檀慧明,李特等. LD端面泵浦的高输出单频Nd∶YVO4绿光激光器[J]. 光学精密工程, 2006,14(4):580-583. HAO E J, TAN H M, LI T, et al. High output and single-frequency ring Nd∶YVO4 laser end-pumped by diode laser[J]. Opt. Precision Eng., 2006,14(4): 580-583.(in Chinese)[11] 姜忠明, 陈殿仁. 全固态复合内腔和频570 nm连续波黄光激光器[J]. 光学精密工程, 2010,18(4):805-808. JIANG ZH M, CHEN D R. All-solid-state continuous-wave doubly resonant all-intracavity sumfrequency yellow laser at 570nm[J]. Opt. Precision Eng., 2010,18(4):805-808.(in Chinese)

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