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Effects of fluid immersion on splice index-matching gel and splice performance

机译：液浸对接头折射率匹配凝胶和接头性能的影响

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Abstract: Although optical splices are protected from fluid immersion during their service life, unanticipated exposures have occurred. For this reason, Bellcore generic requirements include a water immersion test to determine whether splices can tolerate a short-term water exposure and still perform adequately. Mechanical splice failures have been observed in the field and in laboratory experiments. Almost all mechanical splices use index-matching gel, and failures were believed to result from fluid migration along the fiber/gel interface, or fluid diffusion through the gel. We used a photographic analysis to provide direct evidence for these failure modes. We immersed simulated splices in a variety of contaminated fluids and observed that the most rapid mechanism, and the one we consider most likely to result in splice failure, was fluid migration. In addition, we measured loss and reflectance performance for actual splices immersed in contaminated fluids, correlating performance to the results of our photographic analysis. We show that immersion in contaminated water representative of the outdoor plant environment accelerates splice failures.!6
机译：摘要：尽管光学接头在使用寿命期间受到保护，不会浸入液体，但仍发生了意外的暴露。因此，Bellcore的通用要求包括水浸测试，以确定接头是否可以承受短期的水浸并仍能正常工作。在现场和实验室实验中已观察到机械接头故障。几乎所有的机械接头都使用折射率匹配的凝胶，并且认为失效是由于沿纤维/凝胶界面的流体迁移或流体通过凝胶扩散造成的。我们使用摄影分析来为这些故障模式提供直接证据。我们将模拟接头浸入各种受污染的流体中，并观察到流体迁移是最快的机制，也是我们认为最可能导致接头失效的机制。此外，我们测量了浸入受污染流体中的实际接头的损耗和反射性能，从而将性能与我们的摄影分析结果相关联。我们表明，将水浸入代表室外植物环境的受污染水中会加速拼接失败。！6

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