An all-fiber dual-parameter sensor based on cascaded long period grating pair fabricated by femtosecond laser and CO₂ laser has been proposed and realized both theoretically and experimentally. The resonant wavelengths of LPFGs are 1557.80 nm and 1590.88 nm. In the strain range of 0–400 με, strain sensitivities are −7.2 pm/με for C-LPFG and −1.6 pm/με for F-LPFG. In the temperature range of 30–70°C, temperature sensitivities are −41.1 pm/°C for C-LPFG and −21.2 pm/°C for F-LPFG. By analyzing the resonant wavelength characterization, the proposed sensor can be efficiently used for dual-parameters measurement with promising application prospect and great research reference value.

提出了一种基于飞秒激光器和CO ₂激光器的级联长周期光栅对的全光纤双参数传感器，并在理论和实验上实现。LPFG的谐振波长是1557.80 nm和1590.88 nm。在0–400με的应变范围内，C-LPFG的应变敏感性为-7.2 pm /με，F-LPFG的应变敏感性为-1.6 pm /με。在30–70°C的温度范围内，C-LPFG的温度灵敏度为−41.1 pm /°C，F-LPFG的温度灵敏度为−21.2 pm /°C。通过对谐振波长特性的分析，提出的传感器可以有效地用于双参数测量，具有广阔的应用前景和研究参考价值。