High-efficiency and high-power single-frequency fiber laser at 1.6 μm based on cascaded energy-transfer pumping

Xianchao Guan; Qilai Zhao; Wei Lin; Tianyi Tan; Changsheng Yang; Pengfei Ma; Zhongmin Yang; Shanhui Xu

doi:10.1364/PRJ.383174

Photonics Research, Volume. 8, Issue 3, 414(2020)

High-efficiency and high-power single-frequency fiber laser at 1.6 μm based on cascaded energy-transfer pumping

Xianchao Guan^1,2, Qilai Zhao², Wei Lin^1,2, Tianyi Tan², Changsheng Yang^2,4,6、*, Pengfei Ma^2,7, Zhongmin Yang^1,2,3,5,6, and Shanhui Xu^2,3,4

Author Affiliations

¹School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510640, China

²State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510640, China

³Guangdong Engineering Technology Research and Development Center of High-performance Fiber Laser Techniques and Equipment, Zhuhai 519031, China

⁴Hengqin Firay Sci-Tech Company Ltd., Zhuhai 519031, China

⁵Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, Guangzhou 510640, China

⁶Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, Guangzhou 510640, China

⁷e-mail: pengfeima_scut@163.com

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Figures & Tables(10)

Fig. 1. Energy-level scheme of the Er3+/Yb3+ co-doped system with the auxiliary wave.

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Fig. 2. Simulated results on the output powers of (a) auxiliary (1550 nm); inset, pump (976 nm); and (b) signal (1603 nm) waves versus the active fiber length with input auxiliary powers of 0, 200, 400, 500, and 600 mW, respectively.

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Fig. 3. Power evolutions of the signal, auxiliary, and pump lasers in a 5.8-m-long active fiber with the input auxiliary power of 500 mW.

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Fig. 4. Experimental setup of high-power narrow-linewidth PM SF MOPA system at 1.6 μm.

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Fig. 5. (a) Output power versus the pump power and (b) output spectra with 3.8, 5.8, and 8.4-m-long active fiber and injected auxiliary power of 500 mW.

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Fig. 6. Output power versus the pump power with the input auxiliary power of 0, 200, 400, 500, and 600 mW, respectively.

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Fig. 7. Output spectra with the input auxiliary power of 0, 200, 400, 500, and 600 mW, respectively.

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Fig. 8. Measured spectral linewidths at the maximum output powers.

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Fig. 9. Output power stability at the full power for >1 h. Inset, (1) transverse shape of the output beam; (2) longitudinal mode characteristic of the MOPA.

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Table 1. Related Parameters Used in the Theoretical Simulation

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Table 1. Related Parameters Used in the Theoretical Simulation

Sym./Unit	Physical Meaning	Value
$N_{Er} / m^{- 3}$	${Er}^{3 +}$ concentrations	$3 \times 10^{25}$
$N_{Yb} / m^{- 3}$	${Yb}^{3 +}$ concentrations	$6 \times 10^{25}$
$A_{eff} / m^{2}$	Effective area of doped core	$4.91 \times 10^{- 10}$
$σ_{12 a} / m^{2}$	Absorption cross section at 1603 nm	$2.18 \times 10^{- 25}$
$σ_{2 a 1} / m^{2}$	Emission cross section at 1603 nm	$4.66 \times 10^{- 25}$
$σ_{12 b} / m^{2}$	Absorption cross section at 1550 nm	$5.13 \times 10^{- 25}$
$σ_{2 b 1} / m^{2}$	Emission cross section at 1550 nm	$6.59 \times 10^{- 25}$
$σ_{13} / m^{2}$	Absorption cross section at 976 nm	$1.68 \times 10^{- 25}$
$σ_{56} / m^{2}$	Emission cross section at 976 nm	$1.51 \times 10^{- 24}$
$τ_{Er} / s$	Fluorescence lifetimes of ${Er}^{3 +}$ ions	$7 \times 10^{- 3}$
$τ_{Yb} / s$	Fluorescence lifetimes of ${Yb}^{3 +}$ ions	$1 \times 10^{- 3}$
$C_{tr} / m^{3} \cdot s^{- 1}$	Cumulative upconversion energy transfer coefficient	$0.85 \times 10^{- 22}$
$C_{cr} / m^{3} \cdot s^{- 1}$	Energy transfer coefficient from ${}^{2}{F_{5 / 2}}$ level to ${}^{4}{I_{15 / 2}}$ level	$2.1 \times 10^{- 22}$

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Xianchao Guan, Qilai Zhao, Wei Lin, Tianyi Tan, Changsheng Yang, Pengfei Ma, Zhongmin Yang, Shanhui Xu, "High-efficiency and high-power single-frequency fiber laser at 1.6 μm based on cascaded energy-transfer pumping," Photonics Res. 8, 414 (2020)

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Paper Information

Category: Lasers and Laser Optics

Received: Nov. 19, 2019

Accepted: Jan. 23, 2020

Published Online: Feb. 28, 2020

The Author Email: Changsheng Yang (mscsyang@scut.edu.cn)

DOI:10.1364/PRJ.383174

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology