Opt Express. 2020 Oct 26;28(22):33573-33583. doi: 10.1364/OE.408744.
In this study, we present first-time fabrication of FBGs in all ZEONEX-based SMPOFs with a single 25 ns pulse of 248 nm UV irradiation over a 12-month period, which opens up new frontiers in optics and photonics for the effective fabrication of polymer optical fiber Bragg gratings (POFBGs), permitting mass producibility of them. POFBGs were characterized by subjecting them to various physical parameters including temperature and tensile strain. Strain responses of FBGs with similar grating strengths fabricated with 248 nm and 325 nm He-Cd laser irradiations were explored over a year to demonstrate their long-term stability and applicability. Owing to the unique features of the proposed sensing device fabricated by embedding POFBGs in silicone rubber, a good performance in the detection of human heart rate with an amplitude of 4 pm, which is 4 times higher compared to that of silica single mode fiber (SMF) was demonstrated. The response of the sensing device during a human respiration process was also explored where exhalation and inhalation were monitored and distinguished while the breath was held. These revelations signify the importance of ZEONEX-based POFBGs, which allow consistent and effective grating fabrication and are highly promising in the foreseeable future for biomedical applications.
在这项研究中，我们首次在所有基于 ZEONEX 的 SMPOF 中使用单一的 248nmUV 脉冲（25ns 脉冲宽度）在 12 个月的时间内制造 FBG，这为聚合物光纤布拉格光栅（POFBG）的有效制造开辟了光学和光子学的新领域，使其可以大规模生产。通过对各种物理参数（包括温度和拉伸应变）进行测试，对 POFBG 进行了特性表征。对使用 248nm 和 325nmHe-Cd 激光辐照制造的具有相似光栅强度的 FBG 进行了为期一年的应变响应研究，以证明其长期稳定性和适用性。由于将 POFBG 嵌入硅橡胶中制造的传感装置具有独特的特点，与单模光纤（SMF）相比，其在检测人体心率方面的性能非常出色，其振幅为 4pm，提高了 4 倍。还探索了传感装置在人体呼吸过程中的响应，同时监测和区分呼气和吸气，以及在屏住呼吸时的情况。这些发现表明了基于 ZEONEX 的 POFBG 的重要性，它允许进行一致且有效的光栅制造，在可预见的未来，在生物医学应用中具有很高的应用前景。
