Switching Between Stable and Quasi-Periodic States in Circular-Side Hexagonal Resonator Microcavity Laser with Optical Feedback

Zhiru Shen; Tong Zhao; Anbang Wang; Yuncai Wang

doi:10.3788/LOP202259.0514001

Laser & Optoelectronics Progress, Volume. 59, Issue 5, 0514001(2022)

Switching Between Stable and Quasi-Periodic States in Circular-Side Hexagonal Resonator Microcavity Laser with Optical Feedback

Zhiru Shen^1,2, Tong Zhao^1,2、*, Anbang Wang^1,2, and Yuncai Wang^3,4

Author Affiliations

¹Key Laboratory of Advanced Transducers and Intelligent Control System, Ministry of Education, Taiyuan University of Technology, Taiyuan , Shanxi 030024, China

²College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan , Shanxi 030024, China

³School of Information Engineering, Guangdong University of Technology, Guangzhou , Guangdong 510006, China

⁴Guangdong Provincial Key Laboratory of Photonics Information Technology, Guangdong University of Technology, Guangzhou , Guangdong 510006, China

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Figures & Tables(8)

Fig. 1. Schematic of CSHR microcavity laser with optical feedback

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Fig. 2. Simulation results of switching between stable state and quasi-periodic state. (a) Optical spectrum; (b) frequency spectrum; (c) time series; (d) phase diagram

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Fig. 3. Switching between stable state and quasi-periodic state under different feedback rates. (a1)‒(c1) Time series; (a2)‒(c2) frequency spectra

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Fig. 4. Influence factors of $Δ P$ and duration time of switching between stable state and quasi-periodic state. (a) Feedback rate; (b) bias current

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Fig. 5. Bifurcation diagrams of microcavity laser with optical feedback under high bias current. (a) $τ_{f} = 0.2 n s$ ; (b) $τ_{f} = 1.5 n s$

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Fig. 6. Bifurcation diagrams of microcavity laser with optical feedback under low bias current. (a) $τ_{f} = 1.5 n s$ ; (b) $τ_{f} = 5.0 n s$

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Fig. 7. Simulation results of transition state. (a) Optical spectrum; (b) frequency spectra; (c) time series; (d) phase diagram

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Table 1. Values of the parameters for CSHR microcavity laser^[25-26]

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Table 1. Values of the parameters for CSHR microcavity laser^[25-26]

Parameter	Description	Value
N_tr	Transparency density	1.2×10¹⁸ cm^-3
N_s	Logarithmic gain parameter	0.92N_tr
n_g	Group refractive index	3.5
η	Current injection efficiency	0.8
α	Linewidth enhancement factor	4
Γ	Confinement factor	0.25
R	Side length of active area	7.5 μm
d	Thickness of the active region	200 nm
A	Defect recombination coefficient	1×10⁸ s^-1
B	Radiation recombination coefficient	1×10^-10 cm³/s
C	Auger recombination coefficient	1×10^-28 cm⁶/s
g₀	Material gain parameter	1500 cm^-1
λ	Center wavelength	1550 nm
τ_L	Cavity roundtrip time	0.55 ps
ε	Gain suppression factor	18/N_tr

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Zhiru Shen, Tong Zhao, Anbang Wang, Yuncai Wang. Switching Between Stable and Quasi-Periodic States in Circular-Side Hexagonal Resonator Microcavity Laser with Optical Feedback[J]. Laser & Optoelectronics Progress, 2022, 59(5): 0514001

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