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Microfluidic Flows and Heat Transfer and Their Influence on Optical Modes in Microstructure Fibers

机译：微结构纤维中的微流体流动和传热及其对光学模式的影响

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A finite element analysis (FEA) model has been constructed to predict the thermo-fluidic and optical properties of a microstructure optical fiber (MOF) accounting for changes in external temperature, input water velocity and optical fiber geometry. Modeling a water laminar flow within a water channel has shown that the steady-state temperature is dependent on the water channel radius while independent of the input velocity. There is a critical channel radius below which the steady-state temperature of the water channel is constant, while above, the temperature decreases. However, the distance required to reach steady state within the water channel is dependent on both the input velocity and the channel radius. The MOF has been found capable of supporting multiple modes. Despite the large thermo-optic coefficient of water, the bound modes’ response to temperature was dominated by the thermo-optic coefficient of glass. This is attributed to the majority of the light being confined within the glass, which increased with increasing external temperature due to a larger difference in the refractive index between the glass core and the water channel.
机译：已经构建了有限元分析（FEA）模型，以预测考虑外部温度，输入水速和光纤几何形状变化的微结构光纤（MOF）的热流体和光学特性。对水通道内的水层流进行建模显示，稳态温度取决于水通道半径，而与输入速度无关。有一个临界通道半径，低于该临界通道半径，水通道的稳态温度是恒定的，而高于该临界温度，温度会降低。然而，在水通道内达到稳态所需的距离取决于输入速度和通道半径。已经发现MOF能够支持多种模式。尽管水的热光系数很大，但结合模式对温度的响应仍由玻璃的热光系数决定。这归因于大部分光被限制在玻璃内，由于玻璃芯和水通道之间的折射率差异较大，光随着外部温度的升高而增加。

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