Optimization and Development of an Er/Yb Based Mini Infrared LiDAR System for Atmospheric Three-Dimensional Detection

Abstract

In this paper, a mini-infrared LiDAR system that is eye-safe and uses the Erbium-Ytterbium (Er -Yb) co-doped fiber laser that operates at  s described. The proposed system is based on the Master Oscillator Power Amplifier (MOPA) system, which can be utilized to access stable pulsed operation, high peak power and small system integration in order to facilitate remote sensing of the paper demonstrates the modeling and numerical validation of a mini  Er/Yb co-doped fiber based mini infrared LiDAR system of high resolution that can be used to measure the atmosphere using the OptiSystem platform. For the sake of free-space propagation, LiDAR link equation is used that represents the inverse square geometric spreading in combination with atmospheric attenuation due to the value of  corresponding to the value of alpha and the alpha is assumed to be 0.2 in the standard circumstances. The receiver uses transimpedance amplification noise suppression and signal stabilization using an avalanche photodiode (APD) and a Gaussian electrical filtering of the noise at low pass. Lestrange Time-domain analysis reveals a constant pulse integrity with a small distortion, which is the theoretically determining ranging resolution of about 3m according to the principle of time-of-flight  The optical power received in a propagation model obeys the predicted inverse-square law, which confirms the propagation model. The signal-to-noise ratio (SNR) analysis shows SNR greater than 15dB at a distance up to 5 km and beyond the practical detectable level (5 dB) at a distance of about 10km, which proves the sensitivity on a kilometer scale. The analysis of the statistical receivers also demonstrates that the signal-noise separation is high and the detection is good. These findings indicate that the proposed architecture offers accepted architecturally viable, eye-safe, and affordable next-generation performance of deploying LiDAR in small systems with meter-scale precision and unstable long-range energy-beneficial capability. The optimization is performed with the usage of the parametric one to determine the optimal operating conditions and the findings are compared with the traditional single-stage  LiDAR design. The new Er/Yb MOPA LiDAR has a better stability, noise, and compact atmospheric sensing, which corresponds and builds upon recent mini-infrared LiDAR work.