在原有瑞利散射和钠层荧光激光雷达的基础上,通过采用二次倍频余光复用和双光纤焦面分光等关键技术,将上述两种高空探测机制融入一台激光雷达中,实现了对30～80 km瑞利散射和80～110 km钠层荧光回波的同时探测,从而达到了利用一台激光雷达对30～110 km这一宽广的大气段进行连通性探测的目的,为中高层大气的探测研究提供了一种更为有效的手段。主要报道双波长高空探测激光雷达的基本原理、关键技术及目前所达到的探测性能。

Based on the Rayleigh and sodium fluorescence lidar technologies, a dual wavelength high altitude atmosphere detection lidar by combining the above two lidar mechanisms into one lidar facility through the employment of some special technologies, such as the twice frequency doubling to use the residual fundamental optical energy and the dual optical fiber in the focal plane for spectra separation, has been established. In this way, the simultaneously detecting the atmosphere at the altitude of 30～80 km by Rayleigh scattering and 80～110 km by sodium fluorescence in one lidar facility has been realized, and therefore an effective new facility to detect much wider range of atmosphere has been provided. In this paper, the principle, key technologies and the performance of this dual wavelength high altitude lidar are reported.