High-precision temperature measurement with adjustable operating range is investigated and experimentally demonstrated based on weak measurement in the frequency domain. The operating range of measurement is precisely modulated by introducing a dynamic extra time delay to the post-selection pumped by a femtosecond laser. By choosing appropriate nonlinear materials and the attenuation, the resolution of the optimized extra time delay can be improved by two orders of magnitude over that of a traditional phase delay compensator. Considering the influence of noise in the experiment, the highest precision of 8.03 10⁻⁷ C can be achieved by using a currently available spectrometer. Moreover, the average sensitivity can reach to 38 nm/C. Taking advantage of the high precision and adjustable operating range, the proposed method has great potential applications in high-precision temperature measurements.

在频域弱测量的基础上，研究并实验证明了具有可调工作范围的高精度温度测量。通过在飞秒激光泵浦的后选择中引入动态额外时间延迟来精确调制测量的操作范围。通过选择合适的非线性材料和衰减，优化后的额外时间延迟的分辨率可以比传统的相位延迟补偿器提高两个数量级。实验中考虑噪声的影响，最高精度为8.03 10 ^-7C 可以通过使用当前可用的光谱仪来实现。此外，平均灵敏度可以达到 38 nm/C。该方法具有高精度和可调工作范围的优点，在高精度温度测量中具有巨大的应用潜力。