Analysis of Splice Loss of Single-Mode Optical Fiber in the High Altitude Environment

Up to now, there have been no complete theoretical researches and field experiment reports on the fiber fusion loss at high altitude. Therefore, we conducted an exploratory study splicing altitude, firstly analyze influence of mode diameter mismatch, axial offset, angle tilt or end face gap affected by altitude splice loss, then discuss fusion-splicing parameters loss. Besides, a mathematical model for reducing single-mode is established combining effects temperature, humidity, oxygen content, atmospheric pressure, gale gravity. We repeated experiments in different areas (53, 2980, 4000, 4200, 4300, 5020, 5200 m) more than once, hence obtaining large number experimental data, making deep comparison between typical “plain” area “high altitude” area. The most points achieved successfully has reduced least 0.07 dB. simulation results are basically consistent with analysis. Ultimately, method proposed directly applied on-site engineering environment achieves good results.