Jiang Jia, Callender Claire L, Noad Julian P, Ding Jianfu
Communications Research Centre, P.O. Box 11490, Station H, Ottawa, Ontario K2H 8S2, Canada.
Appl Opt. 2009 Sep 10;48(26):4866-73. doi: 10.1364/AO.48.004866.
We report long period grating (LPG) devices based on a hybrid architecture incorporating photopatternable fluorinated poly(aryl ether ketone) and silica layers for applications in wavelength filtering and power distribution. The grating structure was implemented using a periodic corrugation on a thermally oxidized silica lower cladding layer, a photopatterned fluorinated polymer ridge waveguide, and a similar polymer top cladding. In this design, the corrugated silica layer allows a highly stable grating structure, while the fluorinated polymer offers a low propagation loss and easy processability. Strong rejection bands have been demonstrated in the C+L wavelength band, in good agreement with theoretical calculations. The fabricated LPG devices show a thermal dependence of 1.5 nm/ degrees C. Based on this design, an array of waveguides incorporating LPGs has also been fabricated. Distribution of light at the resonance wavelength across all the channels from a single input has been demonstrated. These results are promising for power distribution in photonic network applications or on-chip sensors.
我们报道了一种基于混合结构的长周期光栅（LPG）器件，该结构包含可光图案化的氟化聚芳醚酮和二氧化硅层，用于波长滤波和功率分配应用。光栅结构是通过在热氧化的二氧化硅下包层上形成周期性波纹、光图案化的氟化聚合物脊形波导以及类似的聚合物上包层来实现的。在这种设计中，波纹状二氧化硅层提供了高度稳定的光栅结构，而氟化聚合物具有低传播损耗和易于加工的特性。在C + L波长带中已证明有很强的抑制带，与理论计算结果吻合良好。所制备的LPG器件显示出1.5 nm/℃的热依赖性。基于此设计，还制备了包含LPG的波导阵列。已证明从单个输入在所有通道上的共振波长处的光分布。这些结果对于光子网络应用或片上传感器中的功率分配很有前景。
