Lambert-Girard Simon, Allard Martin, Piché Michel, Babin François
Appl Opt. 2015 Apr 1;54(10):2594-605. doi: 10.1364/AO.54.002594.
The development of a novel broadband and tunable optical parametric generator (OPG) is presented. The OPG properties are studied numerically and experimentally in order to optimize the generator's use in a broadband spectroscopic LIDAR operating in the short and mid-infrared. This paper discusses trade-offs to be made on the properties of the pump, crystal, and seeding signal in order to optimize the pulse spectral density and divergence while enabling energy scaling. A seed with a large spectral bandwidth is shown to enhance the pulse-to-pulse stability and optimize the pulse spectral density. A numerical model shows excellent agreement with output power measurements; the model predicts that a pump having a large number of longitudinal modes improves conversion efficiency and pulse stability.
本文介绍了一种新型宽带可调谐光学参量发生器（OPG）的研制。为了优化该发生器在短中红外波段宽带光谱激光雷达中的应用，对其特性进行了数值和实验研究。本文讨论了在泵浦源、晶体和种子信号特性方面需要做出的权衡，以便在实现能量缩放的同时优化脉冲光谱密度和发散度。结果表明，具有大光谱带宽的种子能增强脉冲间稳定性并优化脉冲光谱密度。数值模型与输出功率测量结果吻合良好；该模型预测，具有大量纵模的泵浦源可提高转换效率和脉冲稳定性。
