Numerical Investigation of All-Normal Dispersion Mode-Locked PbSe Quantum Dot Fiber Laser

Rui Di; Kaihua Wei; Lingyun Xue; Lei Zhu; Qingguang Chen

doi:10.3788/LOP213177

Laser & Optoelectronics Progress, Volume. 60, Issue 7, 0714007(2023)

Numerical Investigation of All-Normal Dispersion Mode-Locked PbSe Quantum Dot Fiber Laser

Rui Di, Kaihua Wei^*, Lingyun Xue, Lei Zhu, and Qingguang Chen

Author Affiliations

School of Automation, Hangzhou Dianzi University, Hangzhou 310018, Zhejiang, China

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Figures & Tables(9)

Fig. 1. Structure of ANDi dissipative soliton mode-locking fiber laser with a PbSe QDF as gain medium

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Fig. 2. Buildup dynamics of dissipative soliton. Evolution of output (a) pulses and (d) spectra during 2000 roundtrips; evolution of output (b) pulses and (e) spectra during 150 roundtrips, marked with black curves per 15 roundtrips; 2D figures of output (c) pulses and (f) spectra after per 15 roundtrips within 150 roundtrips

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Fig. 3. Evolution of steady dissipative soliton in cavity. (a) Pulses and (b) spectra in each position of cavity; (c) pulses and (d) spectra after passing through each device in cavity, insert graph is enlarged details; (e) change of spectral width after passing through each device in cavity

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Fig. 4. Output characteristics when cavity's parameters are changed after laser is balanced. Output (a) pulses and (b) spectra with different QDF's lengths; output (c) pulses and (d) spectra of different QDF's doping concentrations, insert graph is enlarged details; output (e) pulses and (f) spectra with different SMF's lengths

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Fig. 5. Multi-wavelength laser output when SMF length is 0.1 m. Output (a) pulses and (b) spectra of multi-wavelength laser

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Table 1. Parameters in rate equation^[20-21]
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Table 1. Parameters in rate equation^[20-21]
Parameter Data Parameter Data
σ_a，P /m² 3.8×10^-20 σ_a，L /m² 0.25×10^-20
σ_e，P /m² 0 σ_e，L /m² 1.5×10^-20
Γ_P 0.4 Γ_L 0.6
λ_P /nm 980 λ_L /nm 1700
A_rea /m² 7.85×10^-11 τ /ns 300

Table 2. Parameters of devices of laser

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Table 2. Parameters of devices of laser

Device	Parameter	Data	Device	Parameter	Data
SMF	z /m	4	QDF	z /m	0.4
	β₂ /（ps²·km^-1）	20		β₂ /（ps²·km^-1）	20
	γ /（km·W）^-1	2.5		γ /（km·W）^-1	2
SA	α₀	0.1	ISO	Transmittance	90%
	α_ns	0.2	OC	Split ratio	90∶10
	P_sat /W	25	LD	Power /W	0.1
Filter	Bandwidth /nm	100	All devices	Working wavelength /nm	1700

Table 3. Peak power of different lengths and doping concentrations of QDF

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Table 3. Peak power of different lengths and doping concentrations of QDF

QDF length /m	Peak power /W
QDF length /m	Doping concentration is 6×10²¹ m^-3	Doping concentration is 7×10²¹ m^-3	Doping concentration is 8×10²¹ m^-3	Doping concentration is 9×10²¹ m^-3	Doping concentration is 10×10²¹ m^-3	Doping concentration is 11×10²¹ m^-3	Doping concentration is 12×10²¹ m^-3
0.2	0.432	0.511	0.567	0.621	0.656	0.729	0.781
0.3	0.545	0.629	0.694	0.759	0.824	0.834	0.866
0.4	0.666	0.728	0.805	0.837	0.802	0.736	0.634
0.5	0.771	0.824	0.791	0.686	0.574	0.482	0.375
0.6	0.791	0.765	0.596	0.424	0.342	0.407	-

Table 4. Energy of different lengths and doping concentrations of QDF

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Table 4. Energy of different lengths and doping concentrations of QDF

QDF length /m	Energy /pJ
QDF length /m	Doping concentration is 6×10²¹ m^-3	Doping concentration is 7×10²¹ m^-3	Doping concentration is 8×10²¹ m^-3	Doping concentration is 9×10²¹ m^-3	Doping concentration is 10×10²¹ m^-3	Doping concentration is 11×10²¹ m^-3	Doping concentration is 12×10²¹ m^-3
0.2	71.8	84.9	94.2	102.9	108.6	120.0	128.0
0.3	92.7	106.8	117.2	127.6	137.5	139.1	143.9
0.4	115.4	125.5	137.8	142.7	137.3	126.8	110.0
0.5	135.5	143.8	138.6	121.4	102.2	85.9	66.9
0.6	141.7	137.3	108.2	77.2	62.4	74.2	—

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Rui Di, Kaihua Wei, Lingyun Xue, Lei Zhu, Qingguang Chen. Numerical Investigation of All-Normal Dispersion Mode-Locked PbSe Quantum Dot Fiber Laser[J]. Laser & Optoelectronics Progress, 2023, 60(7): 0714007

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