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首页> 外文期刊>IEEE sensors journal >Spectroscopic Sensing Via Dual-CladOptical Fiber
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Spectroscopic Sensing Via Dual-CladOptical Fiber

机译：通过双包层光纤进行光谱传感

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Many optical sensors can be simplified and improved through the use of dual-clad fiber (DCF). Here, the authors highlight two applications related to combustion: H2O vapor temperature measurements in a gas-turbine combustor (by direct absorption spectroscopy) and piston temperature measurements in a reciprocating engine (by fiber-Bragg-grating thermometry). For both applications, the DCF conveniently provides a single-mode light “pitch” and a multimode light “catch” coaxially and within a single fiber. Both applications benefit from the ease of alignment and the access to “tight spaces,” which comes from sensing through a single fiber port. In addition, both applications are improved in “bi-directional” mode: the former with an increased absorption in a double pass through the engine, and the latter by monitoring a reflection feature instead of a relatively weak-transmission feature. The authors discuss potential designs for DCF-based sensors in detail, including options for connecting both a light source and detector to one end of the DCF.
机译：通过使用双包层光纤（DCF），可以简化和改进许多光学传感器。在此，作者重点介绍了与燃烧有关的两个应用：燃气轮机燃烧室中H2O蒸汽温度的测量（通过直接吸收光谱法）和往复式发动机中活塞温度的测量（通过纤维布拉格光栅测温法）。对于这两种应用，DCF可以方便地同轴地并在单根光纤内提供单模光“间距”和多模光“捕获”。两种应用都得益于易于对准和通过单个光纤端口进行感应而获得的“紧凑空间”。此外，两种应用都在“双向”模式下得到了改进：前者在通过引擎的两次通过中具有更高的吸收，而后者则通过监视反射特征而非相对较弱的透射特征而得到了改善。作者详细讨论了基于DCF的传感器的潜在设计，包括将光源和检测器都连接到DCF一端的选项。

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