Experimental realization of wavelength multiplexed nonlinear upconversion in cesium atoms

Jinze Wu; Jinze Wu; Yuhui Xu; Ruige Dong; Junxiang Zhang

doi:10.1364/OL.428307

Optics Letters
Vol. 46,
Issue 13,
pp. 3119-3122
(2021)
•https://doi.org/10.1364/OL.428307

Experimental realization of wavelength multiplexed nonlinear upconversion in cesium atoms

Jinze Wu, Yuhui Xu, Ruige Dong, and Junxiang Zhang

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Jinze Wu, Yuhui Xu, Ruige Dong, and Junxiang Zhang, "Experimental realization of wavelength multiplexed nonlinear upconversion in cesium atoms," Opt. Lett. 46, 3119-3122 (2021)

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Abstract

Blue-violet wavelength multiplexing offers the capability to enhance the operational capacity and efficiency in optical information processing, underwater communications, biology, and medicine. Here we present a specially designed atomic scheme of cesium for simultaneously generating two blue-violet lasers at 456 and 459 nm via four-wave-mixing (FWM)-based upconversion processes. We experimentally and theoretically show that a double-diamond-type coherent system pumped with 852 and 921 nm lasers is responsible for the efficient generation of the two blue-violet lasers. In this system, the large population inversions lead to self-amplified spontaneous emissions at 15.6 and $12.1\,\,\unicode{x00B5}{\rm m}$, which, in turn, serve as the seeds for enhanced double FWM processes with dual-wavelength upconversions.

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Data Availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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Equations (2)

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Energy Level	Decay Rate	Lifetime	Population
$6 D_{3 / 2}$	$2 π \times 2.47 M H z$	64.5 ns	$7.02 \times 10^{- 3}$
$7 P_{3 / 2}$	$2 π \times 1.31 M H z$	121 ns	$7.34 \times 10^{- 6}$
$7 P_{1 / 2}$	$2 π \times 1.15 M H z$	138 ns	$8.73 \times 10^{- 5}$
$7 S_{1 / 2}$	$2 π \times 2.80 M H z$	56.8 ns	$1.92 \times 10^{- 5}$
$5 D_{5 / 2}$	$2 π \times 0.116 M H z$	1.37 µs	$1.11 \times 10^{- 5}$
$5 D_{3 / 2}$	$2 π \times 0.167 M H z$	952 ns	$1.33 \times 10^{- 4}$
$6 P_{3 / 2}$	$2 π \times 5.16 M H z$	30.9 ns	$4.98 \times 10^{- 1}$
$6 P_{1 / 2}$	$2 π \times 4.55 M H z$	35.0 ns	$3.14 \times 10^{- 3}$
$6 S_{1 / 2}$	—	—	$4.92 \times 10^{- 1}$

Transition	Population Ratio
$6 D_{3 / 2} \leftrightarrow 7 P_{3 / 2} (15.6 µ m)$	956
$6 D_{3 / 2} \leftrightarrow 7 P_{1 / 2} (12.1 µ m)$	80.4
$6 D_{3 / 2} \leftrightarrow 6 P_{1 / 2} (876 n m)$	2.24
$7 P_{1 / 2} \leftrightarrow 7 S_{1 / 2} (3.10 µ m)$	4.55

Energy Level	Decay Rate	Lifetime	Population
$6 D_{3 / 2}$	$2 π \times 2.47 M H z$	64.5 ns	$7.02 \times 10^{- 3}$
$7 P_{3 / 2}$	$2 π \times 1.31 M H z$	121 ns	$7.34 \times 10^{- 6}$
$7 P_{1 / 2}$	$2 π \times 1.15 M H z$	138 ns	$8.73 \times 10^{- 5}$
$7 S_{1 / 2}$	$2 π \times 2.80 M H z$	56.8 ns	$1.92 \times 10^{- 5}$
$5 D_{5 / 2}$	$2 π \times 0.116 M H z$	1.37 µs	$1.11 \times 10^{- 5}$
$5 D_{3 / 2}$	$2 π \times 0.167 M H z$	952 ns	$1.33 \times 10^{- 4}$
$6 P_{3 / 2}$	$2 π \times 5.16 M H z$	30.9 ns	$4.98 \times 10^{- 1}$
$6 P_{1 / 2}$	$2 π \times 4.55 M H z$	35.0 ns	$3.14 \times 10^{- 3}$
$6 S_{1 / 2}$	—	—	$4.92 \times 10^{- 1}$

Transition	Population Ratio
$6 D_{3 / 2} \leftrightarrow 7 P_{3 / 2} (15.6 µ m)$	956
$6 D_{3 / 2} \leftrightarrow 7 P_{1 / 2} (12.1 µ m)$	80.4
$6 D_{3 / 2} \leftrightarrow 6 P_{1 / 2} (876 n m)$	2.24
$7 P_{1 / 2} \leftrightarrow 7 S_{1 / 2} (3.10 µ m)$	4.55

Abstract

Data Availability

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Figures (6)

Tables (2)

Equations (2)

Optics Letters