摘要
Abstract
In order to study effect of gas ratio , pumping electron density and cavity length on output power of pulse transversely excited atmospheric ( TEA) CO2 laser, six temperature models were employed to analyze the energy transfer among different molecular vibration modes of working gas and the output power of laser by theoretical analysis and numerical simulation.The simulation was in good agreement with the experimental data .The results show that when the volume ratio of CO2 , N2 , and He rises from 4∶30∶65 to 6∶30∶65, the pulse power increases and the delay time gets shorter .When the volume ratio of CO2, N2, and He rises from 5∶15∶65 to 5∶35∶65, the pulse power firstly increases and then decreases , and reaches the maximum at the volume ratio of N 2 about 25.When the volume ratio of CO 2 , N2 , and He is 5∶30∶65, the maximum pumping electron density rises from 4 ×1012/cm3 to 6 ×1012/cm3 , and the cavity length rises from 2m to 4m, the pulse power will gradually increase .The pulse power is greater , the delay time is shorter , and the tailing phenomenon is more longer .The simulation results show that gas ratio , pumping electron density and cavity length have effects on pulse output power .The study provides a reference for design and optimization of CO 2 lasers.关键词
激光技术/脉冲横向激励大气压CO2 激光器/六温度模型/数值模拟Key words
laser technique/pulse transversely excited atmospheric CO 2 laser/six temperature model/numerical simulation分类
信息技术与安全科学
