Perez-Herrera R A, Bravo M, Roldan-Varona P, Leandro D, Rodriguez-Cobo L, Lopez-Higuera J M, Lopez-Amo M
Department of Electrical Electronic and Communication Engineering, Public University of Navarra, 31006, Pamplona, Spain.
Institute of Smart Cities (ISC), Public University of Navarra, 31006, Pamplona, Spain.
Sci Rep. 2021 Oct 14;11(1):20408. doi: 10.1038/s41598-021-00046-7.
In this work, an experimental analysis of the performance of different types of quasi-randomly distributed reflectors inscribed into a single-mode fiber as a sensing mirror is presented. These artificially-controlled backscattering fiber reflectors are used in short linear cavity fiber lasers. In particular, laser emission and sensor application features are analyzed when employing optical tapered fibers, micro-drilled optical fibers and 50 μm-waist or 100 μm-waist micro-drilled tapered fibers (MDTF). Single-wavelength laser with an output power level of about 8.2 dBm and an optical signal-to-noise ratio of 45 dB were measured when employing a 50 μm-waist micro-drilled tapered optical fiber. The achieved temperature sensitivities were similar to those of FBGs; however, the strain sensitivity improved more than one order of magnitude in comparison with FBG sensors, attaining slope sensitivities as good as 18.1 pm/με when using a 50 μm-waist MDTF as distributed reflector.
在这项工作中，对刻写在单模光纤中作为传感镜的不同类型准随机分布反射器的性能进行了实验分析。这些人工控制的后向散射光纤反射器用于短线性腔光纤激光器。特别地，分析了采用光锥光纤、微钻光纤和50μm腰径或100μm腰径的微钻锥光纤（MDTF）时的激光发射和传感器应用特性。当采用50μm腰径的微钻锥光纤时，测量到输出功率约为8.2dBm且光信噪比为45dB的单波长激光器。所实现的温度灵敏度与光纤布拉格光栅（FBG）的相似；然而，与FBG传感器相比，应变灵敏度提高了一个多数量级，当使用50μm腰径的MDTF作为分布式反射器时，斜率灵敏度高达18.1pm/με。
