Abstract
Abstract Infrared signal detection is widely used in many fields. Due to the detection principle, however, the accuracy and range of detection is limited. Thanks to the ultra stability of the $^{87}$Sr optical lattice clock, external infrared electromagnetic wave disturbances can be responded to. Utilizing the ac Stark shift of the clock transition, we propose a new method to detect infrared signals. According to our calculations, the theoretical detection accuracy in the vicinity of its resonance band of $2.6 \mu \mathrm{m}$ can reach the order of $10^{-14}$W, while the minimum detectable signal of common detectors is on the order of $10^{-10}$W.
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