This paper describes a full waveform sampling LiDAR system applying stripe principle. A kind of denoising method based on edge detection of original stripe signal is proposed. This method is compared with other denoising methods, such as Wiener filtering, mean filtering and median filtering. It is found that the proposed denoising method is much more effective for dealing with the waveform signals.

在碘蒸气中研究了染料激光稳定性对简并四波混频(DFWM)信噪比的影响。 实验中采用多模Nd∶YAG激光器倍频的输出泵浦染料激光器(染料PM580溶于酒精)。 在具有前向补偿分光系统和图像探测系统的帮助下, 在常温常压条件下测得泵浦光在波长为554.013 nm时达到饱和光强为290 μJ。 同时发现染料激光器的光稳定性(输出波长范围, 光束质量和能量转换效率等)随使用时间, 泵浦激光脉冲次数和能量的增加而逐渐减弱。 另外通过对比发现在染料激光器输出不稳定时, 光源单色性和指向性等指标的变化导致在同一泵浦强度不同时刻获得的DFWM信号强度相差很大, 且DFWM信号信噪比低。 染料激光器光源稳定性对DFWM信号影响的研究结果对物质的痕迹量探测以及无荧光物质光谱定标等方面的应用具有重要意义。