Influence of Probe Laser on Instantaneous Bandwidth of Rydberg Atomic Microwave Superheterodyne Receiver System
Instantaneous bandwidth is one of the fundamental technical indexes of the Rydberg atomic microwave superheterodyne receiver system that directly affects its practical application in communication,radar,and navigation.According to the laser-atom-microwave interaction mechanism,laser parameters significantly influence the instantaneous bandwidth,especially the probe laser diameter and power.This study uses an optical lens combination to control the diameter of the probe laser and a half-wavelength plate to control the probe laser power.The instantaneous bandwidth under different probe laser diameters and powers is measured and its influence law is analyzed,supporting the optimal design of the Rydberg atomic microwave superheterodyne receiver system.The experimental results show that the decrease in beam diameter and power can expand the instantaneous bandwidth,and the expansion ability is gradually enhanced;however,the response amplitude decreases with the decrease in beam diameter and power.
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