3.6 W compact all-fiber Pr3+-doped green laser at 521 nm

Jinhai Zou; Jinfen Hong; Zhuang Zhao; Qingyuan Li; Qiujun Ruan; Hang Wang; Yikun Bu; Xianchao Guan; Min Zhou; Zhiyong Feng; Zhengqian Luo

doi:10.1117/1.AP.4.5.056001

Journals >Advanced Photonics >Volume 4 >Issue 5 >Page 056001 > Article

Advanced Photonics
Vol. 4, Issue 5, 056001 (2022)

3.6 W compact all-fiber Pr³⁺-doped green laser at 521 nm

Jinhai Zou^1、2, Jinfen Hong^1、2, Zhuang Zhao³, Qingyuan Li¹, Qiujun Ruan¹, Hang Wang¹, Yikun Bu^1、*, Xianchao Guan³, Min Zhou³, Zhiyong Feng³, and Zhengqian Luo^{1、2、4、*}

Author Affiliations

¹Xiamen University, School of Electronic Science and Engineering, Fujian Key Laboratory of Ultrafast Laser Technology and Applications, Xiamen, China

²Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen, China

³Huawei Technologies Co., Ltd., Shenzhen, China

⁴Xiamen University, Shenzhen Research Institute, Shenzhen, China

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DOI: 10.1117/1.AP.4.5.056001 Cite this Article Set citation alerts

Jinhai Zou, Jinfen Hong, Zhuang Zhao, Qingyuan Li, Qiujun Ruan, Hang Wang, Yikun Bu, Xianchao Guan, Min Zhou, Zhiyong Feng, Zhengqian Luo. 3.6 W compact all-fiber Pr³⁺-doped green laser at 521 nm[J]. Advanced Photonics, 2022, 4(5): 056001 Copy Citation Text

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Spectroscopy of 8000 ppm DC Pr3+-doped fluoride fiber. (a) Absorption spectrum; inset: attenuation and propagation loss spectra. (b) Absorption cross section spectrum. (c) Simplified energy-level scheme of Pr3+. (d) Fluorescence spectrum excited by a 443-nm laser.

Fig. 1. Spectroscopy of 8000 ppm DC

\Pr^{3 +}

-doped fluoride fiber. (a) Absorption spectrum; inset: attenuation and propagation loss spectra. (b) Absorption cross section spectrum. (c) Simplified energy-level scheme of

\Pr^{3 +}

. (d) Fluorescence spectrum excited by a 443-nm laser.

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Microscopic images of DC Pr3+-doped fluoride fiber end-facet. (a) Traditional polishing processing and (b) cutting processing.

Fig. 2. Microscopic images of DC

\Pr^{3 +}

-doped fluoride fiber end-facet. (a) Traditional polishing processing and (b) cutting processing.

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Fig. 3. (a) Schematic and (b) photograph of the compact all-fiber

\Pr^{3 +}

-doped green laser (inset: green light laser spot). (c) The transmission spectra of FDMs (

M_{1}

M_{2}

); insets: photograph (upper) and microscopic image (lower) of the

M_{1}

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Fig. 4. Characteristics of the high-power all-fiber green laser. (a) Output green power versus the pump power. (b) Typical spectrum collected from 400 to 800 nm under 5.71 W pump power. (c) Output spectra under different pump powers. (d) Power stability curve of the green laser operating at 3.0 W. Insets: the beam quality parameters and intensity distribution of the green laser.

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Fig. 5. Characteristics of the all-fiber green laser with different designs. (a) Output green power versus the pump power and (b) the corresponding spectra pumped at 3.76 W.

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Fig. 6. Numerical model. (a) Typical four-level system and (b) schematic of end-pumped fiber laser.

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Fig. 7. Simulation performance of the all-fiber green laser. (a) Output power as a function of the

L

for different

R_{2}

, and (b) the slope efficiency and laser threshold versus the

L

under

R_{2} = 75 %

R_{2 p} = 95 %

. (c) Output power versus the

R_{2}

for different pump powers, and (d) the slope efficiency and laser threshold versus the

R_{2}

under

L = 2 m

R_{2 p} = 95 %

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Fig. 8. (a) Green output power as a function of the pump power for different

L

and

R_{2}

. (b) Green output power versus the doping concentration of

\Pr^{3 +}

under

L = 2.0 m

R_{2 p} = 95 %

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Parameter	Value	Parameter	Value
$λ_{p}$	443 nm	$α_{p}$	$345.4 \times 10^{- 3} m^{- 1}$
$λ_{s}$	521 nm	$α_{s}$	$92.1 \times 10^{- 3} m^{- 1}$
$σ_{a p}$	$0.84 \times 10^{- 24} m^{2}$	$Γ_{p}$	$3.61 \times 10^{- 3}$
$σ_{e p}$	0	$Γ_{s}$	0.92
$σ_{a s}$	0	$L$	Variable
$σ_{e s}$	$0.32 \times 10^{- 24} m^{2}$	$R_{1 p}$	4%
$τ$	$40 μ s$	$R_{1}$	99%
$N$	$1.55 \times 10^{26} m^{- 3}$	$R_{2 p}$	95%
$A_{c}$	$44.2 \times 10^{- 12} m^{2}$	$R_{2}$	Variable