二极管激光阵列在Talbot外腔中同相模的选择

 从理论和实验上对二极管激光阵列在Talbot外腔中的锁相进行了研究。在同相模和异相模近场分布的基础上，利用1维情况下的菲涅耳衍射公式计算了其远场分布。根据同相模和异相模在Talbot腔中的分布特性，采用1/2 Talbot腔并将外腔镜倾斜一个角度a的方法既能选择同相模，又能使模式的功率损耗最小。二极管激光阵列芯片采用CD金刚石材料,“三明治”结构对其进行封装，明显地减小了阵列的“smile”效应。在实验中实现了二极管激光阵列同相模的锁相输出，远场单瓣模的半高全宽为0.11 mm。

In-phase mode selection of diode laser array in external Talbot cavity

Phase locking of a diode laser array in an external Talbot cavity was studied.Far field distributions of in-phase mode and out-of-phase mode were calculated using Fresnel diffraction formula of one-dimension on the basis of near field amplitude distribution.According to the distributions of the in-phase mode and out-of-phase mode in fraction Talbot cavity,a tilted external cavity mirror of 1/2 Talbot cavity was adopted, which made the in-phase mode be selected and the loss of the mode be lowered.In order to let the feedback light be injected into the elements effectively in this experiment,a "sandwich" construction of composite diamond is utilized to package the diode laser array which has obviously eliminated the "smile" effect.Phase locking of in-phase mode is obtained in the experiment,and the FWHM of the single lobe is 0.11 mm.