Intracavity power addition with a close-ended composite four-mirror cavity

• 来源期刊: 中国物理B（英文版）
• 关键词: laser composite four-mirror cavity power addition effective combined gain
• 年，卷（期）: 2007,（12）
• 页码范围: 3710-3718
• 页数: 9页
• 语种: 英文

摘要

We present a novel four-mirror cavity with two active gains to combine power intracavity and also give a detailed theoretical analysis of the combined gain. By using the effective field method, the four-mirror cavity with two gain media can be regarded as a linear resonator with one effective combined gain (ECG), and we procure a theoretical model of the ECG and deduce its exact analytical expression. When the two brach gains are close to each other, the combined gain can be reduced to their product, and the simplified presentation of ECG has been demonstrated. The combined output power which directly reflects the small signal ECG of the four-mirror cavity is studied experimentally,and the results are in good ageeement with the theoretical ones.