Applied Laser and Photonics Group, University of Applied Sciences Aschaffenburg, Aschaffenburg 63743, Germany. manuel.rosenberger@h‑ab.de
Opt Lett. 2013 Mar 1;38(5):772-4. doi: 10.1364/OL.38.000772.
We report on a new optical strain sensor based on a polymer planar Bragg grating (PPBG). The sensor consists of commercially available bulk Polymethlymethacrylate with a UV-inscribed optical waveguide as well as a Bragg grating, both of which are fabricated simultaneously in a single writing step. Upon axial strain, the Bragg wavelength reveals a quasi-instantaneous spectral red shift that depends linearly on the mechanical load with a sensitivity of 2.95 pm/με. The relative reflected intensity of the PPBG remains constant in the investigated load region.
我们报告了一种基于聚合物平面布拉格光栅（PPBG）的新型光学应变传感器。该传感器由市售的块状聚甲基丙烯酸甲酯和紫外写入的光波导以及布拉格光栅组成，两者在单个写入步骤中同时制造。在轴向应变下，布拉格波长显示出准瞬时的光谱红移，该红移与机械负载线性相关，灵敏度为 2.95 pm/με。在研究的负载区域内，PPBG 的相对反射强度保持恒定。
