935nm差分吸收激光雷达系统及对流边界层水汽廓线探测

发布时间：2018-12-21 08:23

【摘要】：研制了一套935nm水汽探测差分吸收激光雷达(DIAL)系统。种子注入的环形腔光参量振荡器,在窄线宽脉冲激光的抽运下,通过Ramp-Hold-Fire方法锁定光参量振荡器谐振腔,产生脉冲能量为45mJ、波长为935nm、重复频率为10Hz、脉冲持续时间为6ns的窄线宽、波长稳定的脉冲激光。接收望远镜直径为305 mm,使用雪崩光电二极管作为探测器,以935.776nm作为探测光波长(λon)、935.860nm作为参考光波长(λoff)进行了地基垂直差分探测实验,获得了上海地区对流边界层水汽浓度廓线。数据时间分辨率为60s,距离分辨率为30 m,在高度600m至对流边界层顶的范围内,水汽浓度昼夜有效测量误差小于0.1g/m~3,将DIAL数据与附近气象观测站无线电探空仪数据进行对比,结果证实了DIAL数据的有效性。
[Abstract]:A 935nm differential absorption lidar (DIAL) system is developed. The seeded ring cavity optical parametric oscillator is pumped by a narrow linewidth pulse laser, and the resonator is locked by the Ramp-Hold-Fire method. The pulse energy is 45mJ, the wavelength is 935nm, and the repetition rate is 10Hz. The pulse duration is the narrow linewidth of 6ns and the wavelength stable pulse laser. Using avalanche photodiode as detector and 位 on), 935.860nm as reference wavelength (位 off), the subgrade vertical differential detection experiment was carried out by using Avalanche photodiode as detector and 位 on), 935.860nm as reference wavelength (位 off). The water vapor profile of the convective boundary layer in Shanghai is obtained. The temporal resolution of the data is 60 s and the distance resolution is 30 m. In the range of 600m to the top of the convective boundary layer, the diurnal effective measurement error of water vapor concentration is less than 0.1 g / mm3. The DIAL data are compared with the radiosonde data of the nearby meteorological observation station, and the validity of the DIAL data is verified.
【作者单位】：中国科学院上海技术物理研究所空间主动光电技术重点实验室;中国科学院大学;
【基金】：中国科学院空间主动光电技术国防创新重点实验室基金(CXJJ-17S024)
【分类号】：TN958.98

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