有源空腔模态的计算仿真

Chen Feng, G. Feng, Wei Li, N. Sun, Zhengyu Zhang, Shouhuan Zhou
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引用次数: 0

摘要

利用Fox-Li迭代法和分步傅里叶变换,对均匀增益和非均匀增益的有源腔模式进行了仿真研究。计算中考虑了输出耦合反射镜损耗、衍射损耗和腔内损耗。计算结果表明,在均匀增益条件下,小信号增益系数(SSG)增大,高阶模的增益大于损耗。输出功率增大,激光束质量变差。在非均匀增益条件下,阈值附近的模态为对称分布。当增益增大、光强增大时,模场的非均匀泵浦影响日益明显。模场峰值向泵浦方向偏移,光束质量变差。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Calculated Simulation of Modes for Active Cavity
Using Fox-Li iterative method and split step Fourier transform, the active cavity modes of uniform and non-uniform gain have been simulated and studied.. In the calculation, the output coupling mirror loss, the diffraction loss and the inner-cavity loss, have been taken into consideration. The calculation results indicate that in the condition of uniform gain, small signal gain coefficient (SSG) increasing, higher order modes' gain are greater than loss. The output power increases and laser beam quality gets worse. In the condition of non-uniform gain, the mode near threshold is symmetric distribution. When the gain gets increasing, light intensity increases, non-uniform pump impact of the mode field increasingly evident. Mode field peak offsets to the pump direction and beam quality gets worse.
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