Generation of coherent blue light via bichromatic pumping in cesium vapor

doi:10.1007/s11467-022-1255-1

Frontiers of Physics

2023, Vol. 18

Issue (4): 42302 https://doi.org/10.1007/s11467-022-1255-1

本期目录

Generation of coherent blue light via bichromatic pumping in cesium vapor

Guiyuan Ge¹, Li Tian¹, Guoqing Zhang¹, Ningxuan Zheng¹, Wenliang Liu^1,², Vladimir Sovkov^1,³, Jizhou Wu^1,^2,⁵(

), Yuqing Li^1,², Yongming Fu⁴, Peng Li⁴, Jie Ma^1,^2,⁵(

), Liantuan Xiao^1,², Suotang Jia^1,²

¹. State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China
². Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
³. St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
⁴. College of Physics and Electronic Engineering, Shanxi University, Taiyuan 030006, China
⁵. Hefei National Laboratory, Hefei 230088, China

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Abstract：

Diode-pumped alkali lasers, possessing high efficiency and narrow linewidth, can provide feasible solutions for wavelength ranges difficult to reach by commercial lasers. In this study, we investigate a generation of coherent blue light (CBL) via four-wave mixing (FWM)-based up-conversion processes in cesium (Cs) vapor. A bichromatic pumping scheme with 852- and 917-nm lasers drives the Cs atoms to the 6D_5/2 excited level, followed by cascaded decay of 6D_5/2 → 7P_3/2 → 6S_1/2, producing 456-nm CBL under phase matching conditions. The fluorescence in multiple bands from blue to near- and far-infrared in the FWM process is demonstrated under different experimental conditions. To optimize the experimental parameters, we investigate the dependence of 456-nm CBL on the vapor temperature, frequency, and intensity of the two pump lasers. A maximum power of 2.94 mW is achieved with pump powers of 430 mW (for 852 nm) and 470 mW (for 917 nm). The corresponding conversion efficiency is 1.5%/W, three-fold higher than those in previous studies. Our results can contribute to fundamental research on atom−photon interactions and quantum metrology.

Key words： four wave mixing conversion coherent blue beam bichromatic pumping

收稿日期: 2022-11-08 出版日期: 2023-03-02

Corresponding Author(s): Jizhou Wu,Jie Ma

作者简介:

Qingyong Zheng and Ya Gao contributed equally to this work.

引用本文:

. [J]. Frontiers of Physics, 2023, 18(4): 42302.
Guiyuan Ge, Li Tian, Guoqing Zhang, Ningxuan Zheng, Wenliang Liu, Vladimir Sovkov, Jizhou Wu, Yuqing Li, Yongming Fu, Peng Li, Jie Ma, Liantuan Xiao, Suotang Jia. Generation of coherent blue light via bichromatic pumping in cesium vapor. Front. Phys. , 2023, 18(4): 42302.

链接本文:

https://academic.hep.com.cn/fop/CN/10.1007/s11467-022-1255-1
https://academic.hep.com.cn/fop/CN/Y2023/V18/I4/42302

Fig.1

Fig.2

Fig.3

Fig.4

Ref.	Pump power	$Δ 852$	$Δ 917, Δ 921$	T, L	P_{CBL, η}

[15]	$P 852$ = 30 mW $P 917$ = 30 mW	0	0	96 ℃ 70 mm	$P 455$ = 4 μW (0.44%/W)
[25]	$P 852$ = 120 mW $P 921$ = 30 mW	0	250 MHz	110 ℃ 30 mm	$P 456$ = 15 μW (0.416%/W) $P 459$ = 13 μW (0.361%/W)
This work	$P 852$ = 430 mW $P 917$ = 470 mW	0.4 GHz	?1.2 GHz	105 ℃ 100 mm	$P 456$ = 2.94 mW (1.5%/W)

Tab.1

Fig.5

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