宽温度范围光纤传输性能温度适应性试验与评价

通过高低温湿热交变试验箱模拟外界温度环境，利用OTDR和CD300色散仪监测光纤传输性能随温度的变化情况，对相同工艺生产的同类型的不同批次的单模光纤进行温度循环试验。试验表明：在－60℃～140℃宽温度范围内，光纤的传输性能均随温度发生波动——在1310nm和1550nm波长处光纤温度附加衰减不超过0.05dB/km；在1550nm处光纤的色散系数随温度升高而降低；PMD随温度的升高有所增加。在该试验的基础上，利用质量管理中的“3σ”控制原理，以现有通信系统标准作为判据，讨论了温度变化时光纤传输性能对通信系统的适应性，推断出在－60℃～140℃温度范围，G.652光纤的衰减、色散和PMD性能均满足10Gbit/s以下的通信系统使用；对于高于10Gbit/s的高速通信系统，应采用适当的措施，尽可能减小拉丝过程中光纤的PMD，这样才能保证PMD指标完全满足高速通信系统要求。

Temperature adaptability test and evaluation for optical fiber transmission performance

The benign and adverse temperature condition in open air is simulated in the temperature and humidity alternated test chamber. The transmission performances of optical fibers are monitored and measured by OTDR and CD300. The testing samples are made with the identical material and process,but in different batches,and testing temperature is from －60℃ to 140℃. The experiments indicate that the transmission performances of optical fibers fluctuate with temperatures in －60℃to 140℃. The temperature induced attenuation of fibers is less than or equal to 0.05 dB/km at 1 310 nm and 1 550 nm. The dispersion coefficient of optical fibers decreases with the temperature increase at 1 550 nm. The PMD of optical fibers increase when the temperature increases. On the basis of temperature cycling test,taking communication standards as criteria and using “3σ” principle of the quality control,fiber transmission performance adaptability to communication system in temperature changing environment is discussed. It is concluded that the attenuation,chromatic dispersion and PMD of G. 652 optical fiber could meet the requirement of high speed communication system for less than 10 Gbit/s from －60℃ to 140℃,but the PMD does not meet the requirements of high speed communication system for higher than 10 Gbit/s. If the PMD is required to meet the requirements of hyper-speed systems,proper measures must be taken to minimize it during fiber drawing process.