Numerical Simulation of 2.8 μm Gain-Switched Er∶ZBLAN Fiber Laser

Kunpeng Luan; Yanlong Shen; Mengmeng Tao; Feng Zhu; Chao Huang; Hongwei Chen; Aiping Yi

doi:10.3788/AOS201939.0714001

Acta Optica Sinica, Volume. 39, Issue 7, 0714001(2019)

Numerical Simulation of 2.8 μm Gain-Switched Er∶ZBLAN Fiber Laser

Kunpeng Luan^1、*, Yanlong Shen^1,2,3, Mengmeng Tao¹, Feng Zhu¹, Chao Huang¹, Hongwei Chen¹, and Aiping Yi¹

¹ State Key Laboratory of Laser Interaction with Matter, Northwest Institute of Nuclear Technology, Xi′an, Shaanxi 710024, China

² State Key Laboratory of Transient Optics and Photonics, Xi′an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi′an, Shaanxi 710119, China

³ Shaanxi Key Laboratory of Photonics Technology for Information, School of Electronics and Information Engineering, Xi′an Jiaotong University, Xi′an, Shaanxi 710049, China

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Abstract Get PDF(in Chinese)

Figures & Tables(10)

Fig. 1. Diagram of energy levels relevant to 2.8 μm Er3+∶ZBLAN fiber laser

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Fig. 2. Process of stable pulse generation

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Fig. 3. Variations in particle number of each energy level, pump power, and output power with time in one period

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Fig. 4. Pump power and signal power as functions of position and time in one period. (a) Ps-forward; (b) Ps-backward; (c) Pp-forward; (d) Pp-backward

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Fig. 5. Pulse shapes taken under different coupling efficiencies. (a) ROC=0.04; (b) ROC=0.28; (c) ROC=0.4; (d) ROC=0.72

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Fig. 6. Effect of coupling efficiency on output characteristics of lasers. (a) output power; (b) pulse width, peak power, and pulse energy

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Fig. 7. Shapes of output pulses with different pump power. (a)-(f) Calculated results in this paper; (g)-(i) experimental results from Ref. [15]

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Table 1. Spectroscopic constants of Er3+[18]

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Table 1. Spectroscopic constants of Er3+[18]

Parameter	Value
${τ_{1}}_{}$ /ms	9.0
${τ_{2}}_{}$ /ms	6.9
${τ_{3}}_{}$ /μs	10
${τ_{4}}_{}$ /μs	120
${τ_{5}}_{}$ /μs	570
${τ_{6}}_{}$ /μs	5
β₁₀	1
β₂₁, β₂₀	0.37, 0.63
β₃₂, β₃₁, β₃₀	0.99, 0,0.001
β₄₃, β₄₂, β₄₁, β₄₀	0.85, 0.006, 0.004, 0.14
β₅₄, β₅₃, β₅₂, β₅₁, β₅₀	0.34, 0.012, 0.015, 0.18, 0.44
β₆₅	0.99

Table 2. Variable spectroscopic parameters and fiber parameters

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Table 2. Variable spectroscopic parameters and fiber parameters

Parameter	Value
${λ_{p}}_{}$ /m	975×10^-9
${λ_{s}}_{}$ /m	2.8×10^-6
${σ_{GSA}}_{}$ /m²	2.1×10^-25
${σ_{ESA}}_{}$ /m²	1.1×10^-25
${b_{2}}_{}$	0.16
b₁	0.1
α /m^-1	0.041
${N_{total}}_{}$ /m^-3	9.6×10²⁶(mole fraction: 6%)	11.2×10²⁶(mole fraction: 7%)
${σ_{SE 21}}_{}$ /m²	4.2×10^-25	3.0×10^-25
${W_{11}}_{}$ /(m³·s^-1)	1.0×10^-24	1.28×10^-24
${W_{22}}_{}$ /(m³·s^-1)	0.3×10^-24	0.36×10^-24
${W_{50}}_{}$ /(m³·s^-1)	0.5×10^-24	0.54×10^-24

Table 3. Simulated results in this paper compared with previous experimental and theoretical results

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Table 3. Simulated results in this paper compared with previous experimental and theoretical results

Parameter	Experiment in Ref. [22]	Model 1 in Ref. [18]	Model 1 in this paper	Experiment in Ref. [23]	Model 2 in Ref. [18]	Model 2 in this paper
Slope efficiency /%	24.2	27.8	26.5	24	23.4	23.2
Threshold /W	0.9	0.95	1.02	~0.3	0.24	0.35
Note: Model 1 was built with the parameters in Ref. [22]; model 2 was built with the parameters in Ref. [23].

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Kunpeng Luan, Yanlong Shen, Mengmeng Tao, Feng Zhu, Chao Huang, Hongwei Chen, Aiping Yi. Numerical Simulation of 2.8 μm Gain-Switched Er∶ZBLAN Fiber Laser[J]. Acta Optica Sinica, 2019, 39(7): 0714001

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Paper Information

Category: Lasers and Laser Optics

Received: Jan. 17, 2019

Accepted: Mar. 22, 2019

Published Online: Jul. 16, 2019

The Author Email: Luan Kunpeng (luankunpeng@nint.ac.cn)

DOI:10.3788/AOS201939.0714001

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology