Fast Discharge Circuit for Longitudinally Excited CO2 Laser

被引：18

作者：

Uno, Kazuyuki ^{[1
]}

Hayashi, Hiroyuki ^{[1
]}

Akitsu, Tetsuya ^{[1
]}

Jitsuno, Takahisa ^{[2
]}

机构：

[1] Univ Yamanashi, Interdisciplinary Grad Sch Med & Engn, Kofu, Yamanashi 4008511, Japan

[2] Osaka Univ, Inst Laser Engn, Suita, Osaka 5650871, Japan

来源：

JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES | 2013年 / 34卷 / 3-4期

基金：

日本科学技术振兴机构;

关键词：

Longitudinal excitation; CO2; laser; Fast discharge; Laser pulse shape;

D O I：

10.1007/s10762-013-9965-7

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In a longitudinally excited CO2 laser with a short laser pulse, similarly to TEA and Q-switched CO2 lasers, a fast discharge is very important. We investigated the use of a fast discharge circuit to obtain a high spike laser pulse in a longitudinally excited CO2 laser. We compared a traditional capacitor-transfer circuit having a buffer capacitance of 700 pF with our direct-drive circuit in which the buffer capacitance is removed. The direct-drive circuit produced a fast discharge and a high spike laser pulse. We also investigated the effect of a resistance connected in parallel with the discharge tube to eliminate low discharge current after the main discharge. A low resistance of 1 k Omega or less acted as a shunt resistance. The shunt resistance was effective in decreasing the energy of the laser pulse tail at high gas pressure.

引用

页码：217 / 224

页数：8

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