Design and stimulated the detectors of high-power lasers DHPL

One of the most important problems fronting the design of optical detectors that operate at the high power; was the inability to withstand the high temperature caused by the interaction between the material of the detector and the high-power laser beam. In this paper, the goal is to design and study a high-power laser detector. Which is bases on the principle of the internal photoelectric effect and is made of a material with a high melting point to prevent its collapse and destruction when high-power laser radiation falls on it. By using specific techniques to reduce the intensity and energy of laser radiation by simulation using the Matlab program (2019), which includes several parameters to calculate the highest energy borne, response and efficiency of the detector. To achieve this, a high-power laser system based on the free electron laser will be design and simulated using the Matlab program (2019), which includes several parameters to calculate the energy and wavelength of the laser outside, in addition to calculating the attenuation factors that occur when the laser signal interacts with the atmosphere. Through the results obtained, it was observed the energy (HPFEL) beam depends on the laser beam radius and the atmosphere density when the (HPFEL) beam propagation through the atmosphere. The photoresponsivity (PR) with the external quantum efficiency (EQE) for the (MSM) photodetector is directly proportional with disk aperture area.