在理论分析基础上,采用常规电弧放电熔接技术,在1550 nm波段对高非线性光子晶体光纤(PCF)与单模光纤(SMF)的熔接损耗机制进行了实验研究,指出模场失配是造成两者直接熔接损耗的主要因素;而熔接过程中因放电电流过大或放电时间过长所导致的光子晶体光纤的包层气孔形变以致塌陷,会引起超过10 dB的附加损耗。采用过渡光纤有效地缓解了两种光纤模场的失配;通过优化放电参数,有效地避免了光子晶体光纤包层气孔的塌陷,实现了高非线性光子晶体光纤和单模光纤的低损耗(<1 dB)熔接。 Based on the theoretical analysis, the welding loss mechanism of PCF and SMF in 1550 nm band is studied by using the conventional arc welding technique. It is pointed out that the mode field mismatch is caused by The main factors of direct splice loss between the two are the additional loss of more than 10 dB caused by the deformation of the cladding stomata of photonic crystal fiber caused by the excessive discharge current or the long discharge time in the welding process. The transition optical fiber effectively alleviates the mismatch of the two optical mode fields. By optimizing the discharge parameters, the collapse of the photonic crystal cladding pore can be effectively avoided, and the high loss of high nonlinear photonic crystal fiber and single mode optical fiber <1 dB) weld.