Chinese Optics Letters, 2016, 14 (8): 081901, Published Online: Aug. 3, 2018  

Extracting signal via stochastic resonance in the semiconductor optical amplifier Download: 898次

Author Affiliations
State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinademy of Sciences, Xi’an 710119, China
Figures & Tables

Fig. 1. Schematic diagram of the stochastic resonance system.

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Fig. 2. Optical bistable hysteresis in the SOA with α=20cm1, η=0.75, g0=280cm1, L=300μm, b=2, φ0=π4, and R=0.3.

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Fig. 3. Bistable output characteristics with different system parameters of the SOA: (a) b=3, φ0=π4, R=0.3, and L=100μm (red), 200 μm (green), 300 μm (blue), and 400 μm (black); (b) L=300μm, b=3, φ0=π4, and R=0.1 (red), 0.2 (green), 0.3 (blue), and 0.4 (black).

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Fig. 4. Bistability characteristics with different parameters: (a) R=0.3, L=300μm, b=3, and φ0=0 (red), π4 (green), π3 (blue), and π2 (black); (b) R=0.3, L=300μm, φ0=π4, and b=1.5 (red), 2 (green), 3 (blue), and 4 (black).

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Fig. 5. Transmission properties of the stochastic resonance system with increasing noise intensities. (a)–(d) input signals S0=0.5MW/cm2 with noise, in which normalized noise intensities D are 01, 11, 51, and 101, respectively; (a′)–(d′) the corresponding output signals through the stochastic resonance system with parameters L=300μm, R=0.3, φ0=π4, and b=3.

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Fig. 6. (a) Cross-correlation coefficients and (b) the cross-correlation gain as functions of the normalized noise intensity D at system parameters L=300μm, R=0.3, φ0=π4, and b=3. The solid curves are the optimal fitted curves neglecting the random fluctuation.

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Wulong Zhao, Hongjun Liu, Qibing Sun, Nan Huang, Zhaolu Wang, Jing Han, Heng Sun. Extracting signal via stochastic resonance in the semiconductor optical amplifier[J]. Chinese Optics Letters, 2016, 14(8): 081901.

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