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Experimental demonstration of photonic spike-timing-dependent plasticity based on a VCSOA

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Abstract

We experimentally design two photonic spike-timing-dependent plasticity (STDP) schemes based on a single vertical-cavity semiconductor optical amplifier (VCSOA) and demonstrate the photonic implementation of STDP characteristics. In the first scheme, a single-polarized optical pulse train is injected into the VCSOA, in which a pair of optical pulses with a time difference is designed to emulate the pre-synaptic and post-synaptic spikes. In the second scheme, dual-polarized optical pulses emulating the pre-synaptic and post-synaptic spikes are injected into the single VCSOA. Furthermore, the effects of the initial wavelength detuning and the power of the input optical pulse on the STDP curve are analyzed. The proposed photonic STDP schemes based on a single VCSOA need relatively low bias current and power consumption, and thus, are ideal optical synaptic devices forming key components in the construction of the photonic neuromorphic computing system.

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Acknowledgements

This work was supported in part by National Natural Science Foundation of China (Grant Nos. 61974177, 61674119), National Outstanding Youth Science Fund Project of National Natural Science Foundation of China (Grant No. 62022062), Fundamental Research Funds for the Central Universities (Grant No. JB210114), and Fundamental Research Funds for the Central Universities and the Innovation Fund of Xidian University (Grant No. 5001-20109215456). The authors would like to thank Tektronix Inc. for providing the arbitrary waveform generators (AWG70001A, AWG70002B).

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Authors and Affiliations

  1. State Key Laboratory of Integrated Service Networks, Xidian University, Xi’an, 710071, China

    Ziwei Song, Shuiying Xiang, Xingyu Cao & Shihao Zhao

  2. State Key Discipline Laboratory of Wide Bandgap Semiconductor Technology, School of Microelectronics, Xidian University, Xi’an, 710071, China

    Shuiying Xiang & Yue Hao

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  1. Ziwei Song
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  2. Shuiying Xiang
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  3. Xingyu Cao
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  4. Shihao Zhao
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  5. Yue Hao
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Correspondence to Shuiying Xiang.

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Song, Z., Xiang, S., Cao, X. et al. Experimental demonstration of photonic spike-timing-dependent plasticity based on a VCSOA. Sci. China Inf. Sci. 65, 182401 (2022). https://doi.org/10.1007/s11432-021-3350-9

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  • DOI: https://doi.org/10.1007/s11432-021-3350-9

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