Embodiments of an optical assembly and methods of making it are provided. The optical assembly includes a first waveguide, a second waveguide, and an optical adhesive for transmitting optical signals between the first waveguide and the second waveguide. The adhesive includes about 20% to about 60% by volume of first monomers. The first monomers have at least two acrylate or methacrylate groups. The optical adhesive also includes about 40% to about 80% by volume of second monomers. The second monomers have at least one fluorine atom and at least one acrylate or methacrylate group. The optical adhesive has a refractive index of from about 1.40 to about 1.55, and in the temperature range of about 10° C. to about 85° C., the refractive index of the optical adhesive has a thermal drift dn/dT of less than the absolute magnitude of |4×10−4/° C.| and the sign of that value is negative.
本文提供了一种光学组件的实施方案及其制作方法。光学组件包括第一波导、第二波导和用于在第一波导和第二波导之间传输光信号的光学粘合剂。粘合剂包括约 20% 至约 60% 体积的第一单体。第一单体具有至少两个
丙烯酸酯或
甲基丙烯酸酯基团。光学粘合剂还包括约 40%至约 80%(体积百分比)的第二单体。第二单体具有至少一个
氟原子和至少一个
丙烯酸酯或
甲基丙烯酸酯基团。光学粘合剂的折射率为约 1.40 至约 1.55,在约 10°C 至约 85°C 的温度范围内,光学粘合剂的折射率的热漂移 dn/dT 的绝对值小于|4×10-4/° C.|,且该值的符号为负。