In this work, the temperature (strain) properties of As₂Se₃ π-phase-shift fiber Bragg gratings (π-PSFBGs) are numerically investigated. The sensing sensitivities are 0.0665 nm C⁻¹ (0.8598 pm μϵ ⁻¹) at 1.55 μm, 0.1546 nm C⁻¹ (1.9968 pm μϵ ⁻¹) at 3.6 μm, 0.2717 nm C⁻¹ (3.51 pm μϵ ⁻¹) at 6.328 μm, and 0.4551 nm C⁻¹ (5.8796 pm μϵ ⁻¹) at 10.6 μm, and the sensitivities are improved with the increasing Bragg wavelength. Based on them, a high-performance narrow band fiber laser is theoretically proposed. The proposed tunable laser has a wider wavelength adjustment range in mid-infrared region, which can reach 27.306 nm at around 10.6 μm. Moreover, the obvious Bragg wavelength shift induced by stretching the As₂Se₃ π-PSFBG helps widen the tunable range of the laser, making possible a fine tuning. Being simple in structure and high in sensitivity, the proposed laser can be applied in mid-infrared region, which is the fingerprint region of numerous molecules and which closely relates to military aviation, environmental conservation, biology and health care regions.

在这项工作中，作为的温度（株）属性₂硒₃ π -PHASE移光纤布拉格光栅（π -PSFBGs）的数值研究。感测灵敏度是0.0665纳米Ç ^-1（0.8598时με ^-1）在1.55 μ米，0.1546纳米Ç ^-1（1.9968时με ^-1）在3.6 μ米，0.2717纳米Ç ^-1（下午3点51 με ^-1）在6.328 μ m和0.4551纳米ç ^-1（5.8796 PM με ^-1在10.6）μm，并且灵敏度随着布拉格波长的增加而提高。基于它们，理论上提出了一种高性能的窄带光纤激光器。所提出的可调谐激光器在中红外区域中的更宽的波长调节范围，这可以在约10.6达到27.306纳米μ微米。此外，明显的布拉格波长移位诱导通过拉伸作为₂硒₃ π -PSFBG有助于加宽激光器的调谐范围，使得能够微调。该激光器结构简单，灵敏度高，可应用于中红外区域，该区域是众多分子的指纹区域，与军事航空，环境保护，生物学和医疗保健领域密切相关。