Stable, narrow-linewidth laser system with a broad frequency tunability and a fast switching time.
Opt Lett
; 49(2): 399-402, 2024 Jan 15.
Article
em En
| MEDLINE
| ID: mdl-38194578
ABSTRACT
For a Rydberg atom-based sensor to change its sensing frequency, the wavelength of the Rydberg state excitation laser must be altered. The wavelength shifts required can be on the order of 10â
nm. A fast-tunable narrow-linewidth laser with broadband tuning capability is required. Here, we present a demonstration of a laser system that can rapidly switch a coupling laser as much as 8â
nm in less than 50â
µs. The laser system comprises a frequency-stabilized continuous wave laser and an electro-optic frequency comb. A filter enables selection of individual comb lines. A high-speed electro-optic modulator is used to tune the selected comb line to a specific frequency, i.e., an atomic transition. Through Rydberg atom-based sensing experiments, we demonstrate frequency hopping between two Rydberg states and a fast switching time of 400â
µs, which we show can be reduced to â¼50â
µs with a ping-pong scheme. If updating the RF frequency is not required during frequency hopping, a 200â
ns switching time can be achieved. These results showcase the potential of the laser system for advanced Rydberg atom-based radio frequency sensing applications, like communications and radar.
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MEDLINE
Idioma:
En
Revista:
Opt Lett
Ano de publicação:
2024
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Article