Laser & Optoelectronics Progress, Volume. 57, Issue 13, 131407(2020)
Analysis of Time-Delay Characteristic and Effective Bandwidth of Three Chaotic Semiconductor Laser Systems
Figures & Tables(8)
Fig. 1. Structural schematic of three chaotic laser systems. (a) Optical feedback chaotic laser system; (b) optical phase modulation chaotic laser system; (c) laser injection chaotic laser system
Fig. 2. Intensity time series and power spectra of three chaotic laser systems. (a1)(b1) Optical feedback chaotic laser system; (a2)(b2) optical phase modulation chaotic laser system; (a3)(b3) laser injection chaotic laser system
Fig. 3. ACF and TDS of three chaotic laser systems. (a) Optical feedback chaotic laser system; (b) optical phase modulation chaotic laser system; (c) laser injection chaotic laser system
Fig. 4. Images of variations in TDS and bandwidth with τm and τi. (a1) Two dimensional map of TDS; (a2) two dimensional map of bandwidth; (b1) three dimensional map of TDS; (b2) three dimensional map of bandwidth
Fig. 5. Images of variations in TDS and bandwidth with γ and η. (a1) Two dimensional map of TDS; (a2) two dimensional map of bandwidth; (b1) three dimensional map of TDS; (b2) three dimensional map of bandwidth
Table 1. Parameters for chaotic laser system
View tableTable 1. Parameters for chaotic laser system
Parameter Value Linewidth enhancement factor α 4 Photon lifetime τp /ps 4.2 Differential gain coefficient g /s-1 2×104 Carrier lifetime τN /ns 16 Feedback strength γ /ns-1 14 Feedback delay time τ /ns 1.5 Injection delay time τi /ns 2.7 Optical angular frequency ω /( rad·s-1) 1.216×1012 Gain saturation coefficient ε 1×10-7 Carrier density at transparency N0 1.25×108 Pumping factor P 1.6 Injection current at threshold Jth 8.5×1016 Injection strength η / ns-1 20
Table 2. Comparison of three chaotic laser systems
View tableTable 2. Comparison of three chaotic laser systems
System TDS inhibition TDS period Bandwidth System construction Optical feedback Poor effect Obvious Narrow It is easy to build and precisely control system Phase modulation Better effect Not obvious Apparent broadening It is difficult to precisely control phase of laser Laser injection Common effect Not obvious Slight broadening It is easy to build and precisely control system
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Pengbo Liu, Shenghai Zhang, Xiaoxu Zhang, Tianan Wu. Analysis of Time-Delay Characteristic and Effective Bandwidth of Three Chaotic Semiconductor Laser Systems[J]. Laser & Optoelectronics Progress, 2020, 57(13): 131407
Paper Information
Category: Lasers and Laser Optics
Received: Sep. 24, 2019
Accepted: Nov. 6, 2019
Published Online: Jul. 30, 2020
The Author Email: Shenghai Zhang (ccstshz@163.com)
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