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Characterization of optical properties of acrylate based adhesives exposed to different temperature conditions

机译：丙烯酸酯基胶粘剂在不同温度条件下的光学性能表征

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Optical adhesives combine the traditional function of structural attachment with a more advanced function of providing an optical path between optical interconnects. This article aims to characterize refractive index and birefringence of such adhesives under environmental exposure to different temperature conditions. Optical time domain reflectometery (OTDR) and prism coupling methods were employed to measure optical properties of an optical adhesive. Thermo-optic coefficient (dn/dT) of the adhesive was observed to decrease noticeably from -2 X 10(-4)degrees C-1 to -4 X 10(-4)degrees C-1 around the glass transition temperature (T-g similar to 78 degrees C). It is observed that refractive indices for both T-E and T-M modes increase with increasing annealing temperature, but the birefringence (T-E - T-M) is decreasing. This suggests that the material has become more isotropic due to the annealing. The environmental changes in optical properties of the adhesive are discussed in the light of Lorentz-Lorenz equations. (c) 2005 Wiley Periodicals, Inc.
机译：光学粘合剂将结构连接的传统功能与在光学互连之间提供光路的更高级功能结合在一起。本文旨在表征在环境中暴露于不同温度条件下此类粘合剂的折射率和双折射。光学时域反射仪（OTDR）和棱镜耦合方法用于测量光学胶粘剂的光学性能。观察到粘合剂的热光系数（dn / dT）在玻璃化转变温度（Tg）附近从-2 X 10（-4）°C-1显着降低到-4 X 10（-4）°C-1类似于78摄氏度）。可以看出，T-E和T-M模式的折射率都随着退火温度的升高而增加，但双折射（T-E-T-M）却在降低。这表明该材料由于退火而变得各向同性。根据洛伦兹-洛伦茨方程讨论了粘合剂光学性能的环境变化。 （c）2005年Wiley Periodicals，Inc.

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