利用VAD工艺制造G.657.A2光纤的研究

Research on the fabrication of G.657.A2 optical fiber by VAD process

近年来,G.657.A2光纤已成为高性能接入网广泛使用的光纤。为了实现其优质、高效的批量制造,介绍了利用气相轴向沉积法(VAD)制造G.657.A2光纤的工艺方法,通过优化波导结构设计和制造工艺参数,改善了VAD光纤制造工艺制造G.657.A2芯棒时出现的波导结构和宏弯损耗性能不够稳定的缺点。通过对光纤的宏弯损耗性能进行理论分析,结合VAD光纤制造工艺的工艺特点,确立了光纤的波导结构设计;再对用VAD工艺制造下凹包层波导结构进行研究,通过实验对比明确了具有优越宏弯损耗性能的光纤包层沉积工艺参数。对所研制的G.657.A2光纤进行了测试,结果表明VAD光纤制造工艺的产品性能好且生产效益高,是一种值得推广的G.657.A2弯曲损耗不敏感光纤的制造方法。

In recent years,G.657.A2 optical fiber has been widely used in high performance access network.In order to achieve high-quality and high-efficiency batch manufacturing,this paper introduces the process of manufacturing G.657.A2 optical fibers by vapor axial deposition(VAD).By optimizing the design and manufacturing parameters of waveguide structure,the instability of waveguide structure and macro-bending loss of G.657.A2 optical fibers produced by VAD manufacturing process are improved.In this paper,the macro-bending loss performance of optical fibers is theoretically analyzed and the waveguide structure design of optical fibers is established combined with the technological characteristics of VAD optical fibers manufacturing process.Then,the manufacturing process of depressed cladding waveguide structure in VAD optical fibers manufacturing process is studied,and the deposition process parameters for excellent macro-bending loss performance is confirmed through experimental comparison.The test results of the G.657.A2 optical fiber show that the VAD optical fiber manufacturing process has high efficiency and good product performance.It is a kind of manufacturing method of G.657.A2 bending loss insensitive optical fiber which is worth popularizing.