基于不失调透镜系统对高斯光束的变换机理，提出并分析了一种低损耗、高强度连接光子晶体光纤（PCF）的透镜耦合方法。与熔接法相比，该方法可实现各类PCF之间以及PCF与普通光纤之间的有效模式转换，并连接因热膨胀系数极其不同而无法拼接或熔接的光纤。在此基础上，搭建了相应的PCF透镜耦合连接及特性测试实验台，实现了单模PCF和常规G.652光纤之间以及保偏PCF和常规G.652光纤之间的高重复性、高强度连接，连接损耗均值分别为0.4 dB和0.65 dB，并对实验结果进行了误差分析，提出了存在的问题及改进设想。

Based on the aligned lens transformation theory of Gaussian beam, a new lens-coupling method of photonic crystal fibers (PCFs) with low loss and high strength is put forward. Compared with the splicing method, this technique can eliminate the mode mismatch loss between two fibers, and is effective in connecting PCF with any other fibers, or connecting two fibers whose thermo-physical properties are so different that they cannot be spliced or jointed together. A PCF lens-coupling connection and test experimental platform is set up to achieve a 0.4 dB connection loss between endlessly single-mode PCF and G.652 fiber, and a 0.65 dB connection loss between polarization-maintaining PCF and G.652 fiber with good repeatability and high strength. Further error analyses, existed questions and improvements are given finally.