基于谐衍射元件的新型光子晶体光纤熔接机校准系统设计

通过分析光子晶体光纤特殊的单芯、多气孔结构及在熔接中传统校准方法的局限性,研究了光纤熔接机中校准系统结构的关键技术.利用谐衍射透镜体积小,衍射效率、精度高等特点,设计了基于谐衍射透镜的离轴光学校准系统.在可见光单波段成像,不仅有效地消除了系统的色差、彗差,大大提高了衍射效率,而且很好地完成了系统像差校正,通过该系统,准确地得到了清晰的PCF截面图像.比较两端面的PCF图像,再对光纤进行空间坐标的调整,即可实现光子晶体光纤熔接中光纤的精确对准.

Calibration system design for novel photonic crystal fiber fusion splicer based on harmonic diffraction component

Difficulties exist in conventional fusion splicer calibration system for photonic crystal fiber because of its characters such as the special single core and the structure of multiple-air holes.The key technique for calibration systems structure of optical fiber fusion splicer was presented in this paper.An abaxial optical calibration system based on harmonic diffraction lens was designed by using this lens that was compact and with high diffraction efficiency as well as excellent precision.The visible light has been used for imaging.The chromatic aberration and coma of the abaxial calibration system were eliminated effectively by the harmonic diffraction component.The diffraction efficiency was greatlyimproved.and the system aberration Was effectively compensated.By using this optical system,a vividPCF corss-section image was attained.By comparing two photographs of two sections and adjusting the PCF spatial position,the precise calibration of photonic crystal fibers in a fusion splicer can be successfully achieved.