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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。
In order to improve the bending reliability of the special cutoff single mode fiber, a special cutoff single mode fiber with a cladding diameter of 80μm was fabricated by vapor deposition. The cutoff wavelength, mode field, attenuation spectrum, macrobend and dispersion Transmission performance and stress corrosion susceptibility parameters. The test results show that the cut-off wavelength of optical fiber is less than 915 nm, single-mode operation with wavelength above 915 nm can be realized, and the transmission loss is lower in several commonly used wavelengths. The zero-dispersion wavelength of fiber is red-shifted to 1 670 nm. Carbon coating process to improve the stress sensitivity of optical fiber sensitivity parameters of 35, combined with the small diameter cladding can be expected to improve the life of the fiber.