Abstract
제2조화파 발생용으로 사용되는 볼록평면거울로 구성된 비대칭 불안정 공진기형 Nd:YAG 레이저의 빔질 특성을 수치적으로 분석하였다. 분석은 <TEX>$M^2$</TEX>, 공진기 내에서의 빔허리 직경, 모드 부피의 계산을 통해서 이루어 졌다. 수치적 계산 결과는 레이저 헤드가 볼록레이저 거울 근방에 위치한 비대칭 공진기 구조가 될 때 고효율의 제2조화파를 발생할 수 있는 조건이잘 충족됨을 보였다. We numerically investigate the characteristic of single Nd:YAG rod laser with the convex-plane resonator configuration in order to get the best condition for high efficient intra-cavity second harmonic generation(SHG). The beam quality is analyzed with ABCD matrixes including the thermal lensing characteristic of Nd:YAG rod. The analysis is focused on stability, M2, beam waist and mode-volume of laser beam inside the resonator. The best conditions for SHG is obtained when a laser rod is set near the curved laser mirror.
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