一种特殊截止单模光纤的传输性能研究

Research on Transmission Characteristics of a Selected Cut-Off Wavelength Optical Fiber

为了提高特殊截止单模光纤的弯曲可靠性,采用气相沉积工艺制作了包层直径80μm碳涂覆的特殊截止单模光纤,测试了光纤的截止波长、模场、衰减谱、宏弯、色散等传输性能和应力腐蚀敏感性参数。测试结果表明光纤截止波长小于915nm,能够实现915nm以上波长单模工作,在常用的几个波段具有较低的传输损耗,光纤的零色散波长红移到1 670nm。采用碳涂覆工艺提高光纤的应力腐蚀敏感性参数达到35,结合小包层直径预期可以提高光纤的使用寿命。

An 80μm selected cut-off wavelength single mode optical fiber was prepared by CVD process.The transmission characteristics,such as mode field,loss spectra,macro bending,dispersion,temperature cycling,were measured.The results show that cut-off wavelength is less than 915 nm,transmission loss is low in conventional waveband,and zero dispersion wavelength is shifted 1 670 nm.The fatigue parameter is 35,and the fiber is expected high lifetime.