Performance characteristics of the microwave assisted chemical oxygen-iodine laser

被引：2

作者：

Endo, M ^{[1
]}

Sugimoto, D ^{[1
]}

Okamoto, H ^{[1
]}

Takeda, S ^{[1
]}

Fujioka, T ^{[1
]}

机构：

[1] Tokai Univ, Dept Phys, Hiratsuka, Kanagawa 2591292, Japan

来源：

ADVANCED HIGH-POWER LASERS | 2000年 / 3889卷

关键词：

iodine; laser; COIL; dissociation; microwave;

D O I：

10.1117/12.380921

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Output power enhancement of Chemical Oxygen-Iodine Laser (COIL) by pre-dissociation of molecular iodine using a microwave discharge was demonstrated. Two types of approach, transonic operation with grid nozzle and supersonic mixing with ramp nozzle array were tested. In the transonic operation case, a gas velocity at the lass cavity was estimated to be 167m/s, and I-2 dissociation rate was found to be 50%. As a result, 9% of output power enhancement with the microwave pre-dissociation was obtained. In the supersonic injection case, we have initially obtained very poor output power. When we changed the gas now rates, cavity flow returned to subsonic and we have obtained 284W output power with 16% of chemical efficiency. No output power enhancement with microwave adoption was observed for ramp nozzle array. It was due to the insufficient dissociation of iodine due to the high stagnation pressure of secondary flow.

引用

页码：494 / 502

页数：9

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