Detection of microwave electric field based on multiple atomic vapor cells

Most studies on Rydberg atom-based microwave electric field measurement are achieved by using a single atomic vapor cell. In this work, we design an 1×4 uniform linear array of vapor cells by splitting the probe laser and coupling laser, and achieve simultaneous measurement of the microwave electric fields at the center of four vapor cells using Rydberg electromagnetically induced transparency method. At the frequency of the microwave electric field with about 6.92GHz, the measured AT splitting at four different spatial locations is linearly related to the square root of power of the microwave electric field. The microwave measurement for different spatial location allows the Rydberg atoms to meet the need of communications and radar better.