Comparative modeling of detection configurations of lidar

This paper demonstrates the different modelling of detection for lidar by using continuous wave and pump laser configurations as well as the signals received performance of the set test range. The configurations are developed by three main subsystems namely the transmission part that is consists of laser source, modulator, amplifier, oscillator, the target, and the receiver part that is constructed of photodetector, amplifier, filter, and signal processing. The distances tested in the simulation focuses on several ranges that is less than 1 kilometer and the wavelength used is 1550 nm. The signals obtained from both configuration modellings were analyzed and compared in terms of the tests delay, distance measurement of the target range from 20 m till 1000 m, frequency and the received signal power. Observations and analysis from the simulation results show the differences of signal pulses obtained when using continuous wave and laser pulse as well as the difference of received signal power for both configurations. Analysis shows that for lidar distance measurement, range of target also affect the received signal power where the laser pulses show detection of longer range as compared to continuous wave although for shorter distances, continuous wave displayed averaged good performance in terms of received signal power. This work will be the basis of further investigations of light detection and ranging for optimization purpose in terms of laser beam shape, fiber medium, polarization effect, optimum distance, and particle detection.