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制作光通信用光纤需要低衰耗、低色散等传输性能良好的材料,所以对光纤预制棒工艺的研究是很重要的。实现棒材中组份的最佳径向分布是这一研究中的关键课题。在生产工艺中是采用逐渐改变相关组份的载气流量的办法来实现组份的径向分布的。为了稳定载气组汾的浓度,通常只是控制组份液的温度,而对环境的温度变化往往未加重视。由于载气温度随环境温度变化,因此气—液(组份液)温度差是变化的。在此种状态下,载气中组份
Optical communication optical fiber production needs low attenuation, low dispersion and other materials with good transmission performance, so the optical fiber preform technology research is very important. Achieving optimal radial distribution of the components in the bar is a key issue in this study. The radial distribution of the components is achieved by gradually changing the carrier gas flow rate of the relevant components in the production process. In order to stabilize the concentration of the carrier gas group, it is usually only to control the temperature of the component liquid, while the environmental temperature changes are often not emphasized. Since the temperature of the carrier gas varies with the ambient temperature, the temperature difference of the gas-liquid (component liquid) varies. In this state, the carrier gas components