长输出脉冲螺旋CO2激光器的数值模拟

IF 3 Q3 Physics and Astronomy

Results in Optics Pub Date : 2025-02-01 DOI:10.1016/j.rio.2025.100777

Sh. Al-Hawat, S. Al-Sheikh Salo

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引用次数: 0

摘要

对以前用FORTRAN编写的计算程序进行了修改，以表征自制的长输出脉冲螺旋横向激发（TE） CO2激光器。计算了在CO2:N2:He = 1:1:3、压力为45 ~ 85 mbar、电压为9 ~ 12 kV时，激光输出脉冲的功率和强度、激光能级居数和在0001和1000两个有效振动能级之间的居数反演、能级温度、激光增益因子、激发率和激光脉冲能量。对激光输出脉冲的能量和功率的测量值与计算值进行了比较，两者吻合较好。其中最大功率为198 W，脉冲持续时间为80µs，脉冲能量为15.48 mJ，对应压力为85 mbar，电压为10 kV。

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Numerical modeling of a helical TE CO2 laser with a long output pulse

A previous computational program written in FORTRAN was modified to characterize a homemade helical transversely excited (TE) CO₂ laser with a long output pulse.

The power and intensity of the laser output pulse, the laser levels population and population inversion between two effective vibrational levels (00⁰1) and (10⁰0) of the laser, in addition to the temperatures of these levels and laser gain factor and the excitation rates and laser pulse energy were calculated for pressure varied between 45 and 85 mbar and voltage between 9 and 12 kV with a mixture ratio of CO₂:N₂:He = 1:1:3.

A comparison between the measured and calculated energy and power of the laser output pulse was carried out, and gave a good agreement between them. Among the results, the maximum power reached 198 W, with pulse duration of 80 µs, and pulse energy of 15.48 mJ corresponding to pressure 85 mbar and voltage of 10 kV.

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