红外与毫米波学报, 2019, 38 (4): 04451, 网络出版: 2019-10-14   

探测大气压力的差分吸收激光雷达的一种光发射机

A laser transmitter of differential absorption lidar for atmospheric pressure measurement
洪光烈 1,2,*王钦 1,3肖春雷 1,2孔伟 1,2王建宇 1,3
作者单位
1 中国科学院空间主动光电技术重点实验室,上海 200083
2 中国科学院上海技术物理研究所,上海 200083
3 中国科学院大学,北京 100049
摘要
介绍了一种氧气A带差分吸收激光雷达发射机,试图用于大气压力探测实验.该激光发射机是基于种子注入的光参量振荡器和光参量放大器的结构.作为从振荡器,采用一个环形腔KTP光参量振荡器.作为注入种子的主振荡器,即一个连续波外腔调谐二极管激光器.该连续波外腔调谐二极管激光器,由高精度的波长计构成的一个PID(Proportional-Integral-Derivative)伺服控制环,稳定其工作波长.向光参量振荡器的谐振腔注入连续波的种子激光,通过“Ramp-Hold-Fire”技术,锁定OPO(Optical Parametric Oscillator) 谐振腔的腔长.该激光发射机具有高的光频率稳定性(30 MHz/rms)、窄的线宽(傅立叶转换限)、高的脉冲能量(≥45 mJ)等性能,能够在工作期间保持稳定.发射机系统以单纵模式工作,使得差分吸收激光雷达对后向散射光信号的窄带探测成为可能.因而此类系统具有精确探测大气压力的发展潜力.
Abstract
Here is a transmitter for an oxygen-band differential absorption lidar that is tried for atmospheric pressure detection experiment. The laser transmitter is based on the structure of a seed-injected optical parametric oscillator and an optical parametric amplifier. As a slave oscillator, a ring cavity KTP optical parametric oscillator is used. As the master oscillator, is a continuous wave external cavity diode laser. Operating wavelength of the continuous wave external cavity diode laser was stabilized, by a Proportional-Integral-Derivative (PID) servo control loop composed of a high-precision wavelength meter. A continuous wave seed laser is injected into the optical parametric oscillator cavity, and the cavity length of the OPO (Optical Parametric Oscillator) resonator is locked by the “Ramp-Hold-Fire” technique. This laser transmitter has been proven to have the following properties: high optical frequency stability (30 MHz/rms), narrow linewidth (Fourier transform limited), and high pulse energy (≥45 mJ),which can be maintained during operation. The transmitter system operates with a single longitudinal mode, making it possible for differential absorption lidar to detect narrowband backscattering signals. Such systems have the potential to accurately measure atmospheric pressure.
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洪光烈, 王钦, 肖春雷, 孔伟, 王建宇. 探测大气压力的差分吸收激光雷达的一种光发射机[J]. 红外与毫米波学报, 2019, 38(4): 04451. HONG Guang-Lie, WANG Qin, XIAO Chun-Lei, KONG Wei, WANG Jian-Yu. A laser transmitter of differential absorption lidar for atmospheric pressure measurement[J]. Journal of Infrared and Millimeter Waves, 2019, 38(4): 04451.

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