3.6 W compact all-fiber Pr<sup>3+</sup>-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

Advanced Photonics, Volume. 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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Figures & Tables(9)

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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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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Table 1. The parameters used in numerical simulation.

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Table 1. The parameters used in numerical simulation.


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

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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," Adv. Photon. 4, 056001 (2022)

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Paper Information

Category: Research Articles

Received: May. 13, 2022

Accepted: Aug. 4, 2022

Published Online: Aug. 31, 2022

The Author Email: Yikun Bu (buyikun0522@xmu.edu.cn), Zhengqian Luo (zqluo@xmu.edu.cn)

DOI:10.1117/1.AP.4.5.056001

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology