Author:
Hu Jinlian,Jiao Yuechun,He Yunhui,Zhang Hao,Zhang Linjie,Zhao Jianming,Jia Suotang
Abstract
AbstractWe investigate the response bandwidth of a superheterodyne Rydberg receiver at a room-temperature vapor cell, and present an architecture of multi-channel lasers excitation to increase the response bandwidth and keep sensitivity, simultaneously. Two microwave fields, denoted as a local oscillator (LO) $E_{\text{LO}}$
E
LO
and a signal field $E_{\text{SIG}}$
E
SIG
, couple two Rydberg states transition of $|52D_{5/2}\rangle \to |53P_{3/2}\rangle $
|
52
D
5
/
2
〉
→
|
53
P
3
/
2
〉
. In the presence of the LO field, the frequency difference between two fields can be read out as an intermediate frequency (IF) signal using Rydberg electromagnetically induced transparency (EIT) spectroscopy. The bandwidth of the Rydberg receiver is obtained by measuring the output power of IF signal versus the frequency difference between two fields. The bandwidth dependence on the Rabi frequency of excitation lasers is presented, which shows the bandwidth decrease with the probe Rabi frequency, while it is quadratic dependence on the coupling Rabi frequency. Meanwhile, we investigate the effect of probe laser waist on the bandwidth, showing that the bandwidth is inversely proportional to the laser waist. We achieve a maximum response bandwidth of the receiver about 6.8 MHz. Finally, we design an architecture of multi-channel lasers excitation for increasing the response and keeping the sensitivity, simultaneously. Our work has the potential to extend the applications of Rydberg atoms in communications.
Funder
National Natural Science Foundation of China
1331 project of Shanxi province
National Key Research and Development Program of China
Scientific Cooperation Exchanges Project of Shanxi province
Program for Changjiang Scholars and Innovative Research Team in University
Publisher
Springer Science and Business Media LLC
Subject
Electrical and Electronic Engineering,Condensed Matter Physics,Atomic and Molecular Physics, and Optics,Control and Systems Engineering
Cited by
3 articles.
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