多脉冲激光的微弱信号探测能力分析研究
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国家自然科学基金项目(No.U1631240;No.11503068);亚毫米精度卫星激光反射器关键特性的研究及其应用项目(No.11903066)资助


Research on weak signal detection ability for burst-pulses laser
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    摘要:

    激光测距雷达方程分析表明,多脉冲的包络总能量与脉冲能量相等单脉冲具有相同的测距能力。由偏振分束,增加两路光的光程,再由偏振合束的方法以及根据再生放大的特性,实现单个脉冲、双脉冲、四脉冲的2 kHz重复频率及等功率的532 nm皮秒多脉冲输出,以上海天文台千赫兹卫星激光测距系统为平台,实现各多脉冲下的卫星激光测距。分析卫星回波的有效点数,以及各脉冲的回波叠加后的精度,结果表明各输出方式的有效回波点数基本接近,精度与单脉冲的误差小于1 mm,验证了多脉冲总能量与脉冲能量相等单脉冲具有相同的测距能力。多脉冲相对单脉冲能够更好地提高整个脉冲包络的能量,增大激光测距的脉冲发射能量,有利用微弱信号激光的探测。

    Abstract:

    The total energy of the burst-pulses has the same ranging capability as the pulse energy equal to the single pulse from laser ranging radar equation. The single-pulses,double-pulses and four-pulses in burst-pulses at 2 kHz repetition rate are obtained respectively with the optical beam splitting by the beam of polarization and regenerative amplification,and the single pulse and burst-pulses have the same average power. Based on the kilohertz satellite laser ranging (SLR) system of the shanghai observatory,single pulse and burst-pulses for SLR are realized obtained respectively. The effective points from SLR′s echo and the precision of single pulse and the echo superposition for and burst-pulses are analyzed. The results show that the echo points for single pulse and burst-pulses are close to each other,the error of the precision was less than 1 mm,and therefore the same ranging capability are verified for the burst-pulses energy equal to the single pulse energy. The burst-pulses laser can better improve the energy than single pulse laser,and increase the pulse emission energy of the laser ranging;it is propitious to the detection for weak signal laser.

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门琳琳,龙明亮,张海峰,邓华荣,吴志波,张忠萍.多脉冲激光的微弱信号探测能力分析研究[J].激光与红外,2020,50(5):557~562
MEN Lin-lin, LONG Ming-liang, ZHANG Hai-feng, DENG Hua-rong, WU Zhi-bo, ZHANG Zhong-ping. Research on weak signal detection ability for burst-pulses laser[J]. LASER & INFRARED,2020,50(5):557~562

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  • 在线发布日期: 2020-06-02
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