Xinwei Wang, Youfu Li, Yan Zhou
Opt Express. 2015 Mar 23;23(6):7820-31. doi: 10.1364/OE.23.007820.
Constructing flexible regular-shaped range-intensity profiles by the convolution of illuminator laser pulse and sensor gate pulse is crucial for 3D super-resolution range-gated imaging. However, ns-scale rectangular-shaped laser pulse with tunable pulse width is difficult to be obtained, especially for pulsed solid-stated lasers. In this paper we propose a multi-pulse time delay integration (MPTDI) method to reshape range-intensity profiles (RIP) free from the above limitation of pulsed lasers. An equivalent laser pulse temporal shaping model is established to evaluate and optimize the MPTDI method. By using MPTDI, the RIP shape and depth of viewing can both be flexibly changed as desired. Here typical triangular and trapezoidal RIPs are established for 3D imaging under triangular and trapezoidal range-intensity correlation algorithms. In addition, a prototype experiment is demonstrated to prove the feasibility of MPTDI.
通过照明器激光脉冲与传感器门脉冲的卷积来构建灵活的规则形状距离-强度剖面，对于三维超分辨率距离选通成像至关重要。然而，难以获得具有可调脉冲宽度的纳秒级矩形激光脉冲，尤其是对于脉冲固态激光器而言。在本文中，我们提出了一种多脉冲时间延迟积分（MPTDI）方法，以重塑距离-强度剖面（RIP），摆脱脉冲激光器的上述限制。建立了等效激光脉冲时间整形模型，以评估和优化MPTDI方法。通过使用MPTDI，RIP形状和观察深度都可以根据需要灵活改变。这里针对三角形和梯形距离-强度相关算法，为三维成像建立了典型的三角形和梯形RIP。此外，还进行了原型实验，以证明MPTDI的可行性。
