基于弱值放大的高精度温度变化测量研究

High precision measurement of temperature changes based on weak value amplification

精确测量温度的变化在现代科技中有重要的意义。极其微小的温度变化通常难以直接测量。依据波片的温度变化引起o光和e光之间相位差改变这一原理,文章搭建了基于偏振的弱值放大系统,将这一温度变化引起的微小的相位差变化量加以放大,并转换为易于测量的光功率的变化量,从而间接测量出多级石英波片的温度变化量,测量精度达到了0.0042℃,与平衡零差探测法相比,精度提高了9倍。

High precision measurement of temperature changes is of great significance in modern technology.It is usually hard to measure ultrasensitive temperature changes directly.Based on the fact that temperature changes can cause the phase changes between the o and e light,a polarization dependent weak-value-based system is constructed to amplify these phase changes that will alter the intensity of detected light,from which the temperature changes of multi order quartz wave plate can be inferred..The precision can reach 0.0042℃,which is 9 times higher than the balanced homodyne detection.