时空域位相调制型光学谐振腔的模式

Mode of Resonators with Spatial-temporal Phase Modulation

提出一种含有时空位相调制元件的光学谐振腔 ,利用空间 -频率域的相干模式理论对这种谐振腔的模式作了分析和数值模拟。结果表明 ,对固定位相片 ,腔内光场是完全相干的 ,在一定参数下 ,在一镜面上可得到平顶光束 ;对随机微扰型位相片 ,输出模式是部分相干的 ,在合适参数下 ,也可得到平顶光束。

A kind of resonator with spatial temporal phase modulation is proposed. The modes of this kind of resonator are analyzed and calculated numerically in terms of the modal theory of coherence in space time domain. The results show that the modes are completely coherent under fixed phase modulation on one mirror of resonator. There is a suitable value of resonator parameter to obtain flat top beam on one mirror. For resonators with random disturbed phase mirror, its modes are partially coherent, and there also exists a suitable parameter to get flat top beam.