随机激光中谐振腔的不稳定性研究

Research of Random Laser in the Resonance Cavity of Does not Stability

为了进一步研究随机激光中谐振腔的物理特性,首先从随机激光腔物理角度分析了其具有的相干光与非相干光激发强度,然后建立了本文涉及谐振腔物理模型d2P/dt2+△ω1dP/dt+ω21P=κ△NEZ。其采用时域有限差分法得出△x=△y=10 nm时,其时间步长为△t=△x(/2c)≈1.67×1017s,最后进行谐振腔的仿真特性分析得出:涉及GaAs随机激光器,在输入-输出曲线中出现两个斜坡,在第二个阈值处显现出高度的不稳定性,并且不稳定性并没有随着泵浦能量的进一步增加而消失。这一研究结果对于进一步了解随机激光的物理特性具有一定的意义。

To further research random laser in the resonance cavity of physical characteristics, text in the first random laser cavity physical angle analysis has its has of coherent light and non-coherent light fired strength, then established has this article involved resonance cavity physical model its used Shi domain limited difference law concluded that Shi its time step for, finally for has resonance cavity of simulation characteristics analysis concluded that： involved GaAs random laser, in entered-output curve in the appears two a slopes, In the second threshold value showed a high degree of instability, and instability did not disappear as the pump further increases the energy of, results of this study for further information on physical properties of random laser has a certain significance.