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首页> 外文期刊>Optical engineering >Soot-overcladding process for enlarging modified chemical vapor deposition preforms
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Soot-overcladding process for enlarging modified chemical vapor deposition preforms

机译：烟灰包覆工艺，用于扩大改性化学气相沉积预成型坯

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摘要

The equipment and the process for soot sleeving of optical fiber preforms made by the modified chemical vapor deposition (MCVD) method has been developed. The equipment consists of a soot-sleeving lathe that is used for deposition of soot glass particles onto the surface of an MCVD core preform and a separate furnace that is used for drying and sintering the deposited porous glass layer. An outline of the equipment is presented. This equipment has then been used to study the basic parameters of flame hydrolysis deposition as well as sintering of the porous layer. The raw material and the fuel gas flow as well as the substrate diameter proved to be the most important parameters affecting the process. The basic knowledge achieved is used to optimize the process for three different preform sizes. In the soot-sleeving process for 80-km optical fiber preforms, an average deposition rate of 5.2 g/min is achieved with a double burner. The overall quality of the drawn fiber proved to be good. The typical attenuations were 0.330 and 0.215 dB/km at 1310- and 1550-nm wavelengths, respectively. The geometry of the drawn fibers was found to be very good.
机译：已经开发了通过改进的化学气相沉积（MCVD）方法制造的光纤预制棒烟so套管的设备和方法。该设备由用于将烟灰玻璃颗粒沉积到MCVD核心预成型件表面上的烟灰套筒车床和用于干燥和烧结沉积的多孔玻璃层的单独炉子组成。介绍了设备的概况。然后，该设备已被用于研究火焰水解沉积以及多孔层烧结的基本参数。原料和燃气流量以及基材直径被证明是影响工艺的最重要参数。所获得的基本知识用于优化三种不同瓶坯尺寸的工艺。在80公里长的光纤预制棒的烟ot处理中，双燃烧器的平均沉积速率为5.2 g / min。拉伸纤维的整体质量证明是良好的。在1310和1550 nm波长处，典型衰减分别为0.330和0.215 dB / km。发现拉伸纤维的几何形状非常好。

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