Through analysis on the principle of the fiber optical splice loss,this paper introduces some effective measures to reduce the fiber optical splice loss,at the same time,introduces the measuring technique of the fiber optical splice loss.

Based on the self-designed PCF,the splice loss mechanism between PCFs and single-mode fibers was studied theoretically and experimentally.

The intrinsic and extrinsic causes of splice loss for optical fiber are analyzed and summarized in detail.

Through analyzes the reason which the optical fiber splicing loss produces, obtains may adjust splicing the parameter to improve the model field unbalance,and realizate the different type optical fiber low loss splicing.

Theoretical and experimental investigations on the splicing loss mechanism of high nonlinearity photonic crystal fiber(PCF) and single mode fiber(SMF) at(1550 nm) point out that mismatching of the mode field of these two kind fibers is the main cause of the splicing loss.

Main factors affecting the splicing loss are analyzed,and the comparison shows that the theoretical result is in agreement with the experimental one.

This paper discusses the disserve about "not splicing loss", its causes are analyzed of installed with different structure and methods, It discusses the application method and much process of fiber optic splicing.

Then the mode distributions at the fiber tips and the corresponding splice loss between the two fibers were calculated, and the fusion power range for low splice loss was thus deduced.