论文标题
湍流中空间部分相干场的结构鲁棒性的实验证明
Experimental demonstration of structural robustness of spatially partially coherent fields in turbulence
论文作者
论文摘要
在长距离光学通信的背景下，已经对空间完全连贯的结构化场进行了广泛的研究，因为此类磁场的强度曲线中的结构用于编码信息。在没有湍流的情况下，这种进行光学通信的方法非常有效。然而，在存在湍流的情况下，由于该场的完全空间连贯性，此类场的强度结构开始降解，并且这种结构降解随着湍流强度的增加而增加。另一方面，一些理论研究现已表明，在空间上仅部分相干的结构化场受到湍流的影响较小。但是，到目前为止，尚未报道这种实验示范。在这封信中，我们在实验上证明了在湍流存在下部分相干场的结构鲁棒性，并且我们表明，对于给定的湍流强度，随着场的空间相干性长度的降低，部分相干场的结构鲁棒性增加。
Structured fields that are spatially completely coherent have been extensively studied in the context of long-distance optical communication as the structure in the intensity profile of such fields is used for encoding information. This method of doing optical communication works very well in the absence of turbulence. However, in the presence of turbulence, the intensity structures of such fields start to degrade because of the complete spatial coherence of the field, and this structural degradation increases with the increase in the turbulence strength. On the other hand, several theoretical studies have now shown that the structured fields that are spatially only partially coherent are less affected by turbulence. However, no such experimental demonstration has been reported until now. In this letter, we experimentally demonstrate the structural robustness of partially coherent fields in the presence of turbulence, and we show that for a given turbulence strength the structural robustness of a partially coherent field increases as the spatial coherence length of the field is decreased.
