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Modeling the effects of interband and intraband transitions on phase and gain stabilities of quantum dot semiconductor optical amplifiers

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Abstract

In this paper, the effects of interband and intraband transitions on the gain and phase stabilities in quantum dot semiconductor optical amplifier (QD-SOA) are investigated both temporally and spectrally employing electrical and optical pumping schemes. For this purpose, the carrier rate equations in different energy states coupled to the traveling wave optical field equation have been numerically solved to derive the dynamical behavior of QD-SOA. Our results show that the gain and phase response can be stabled under optical pumping (OP) scheme because the role of the interband and intraband transitions on the dynamics of QD-SOA is reduced. This behavior leads to high-speed pattern effect-free cross-phase modulation (XPM) in QD-SOA. It is found that optically pumped QD-SOA can have high performance in phase based applications. Moreover, it is shown that under OP scheme although the QD-SOA has lower gain value and slower gain recovery time, the ultrafast cross-gain modulation (XGM) without pattern effect is possible and the phase is recovered within a shorter time compared to EP scheme. The behavior arises from the different capacity of the carrier reservoir for pumping schemes.

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Authors and Affiliations

  1. Department of Electrical Engineering, Shahed University, Tehran, Iran

    Mehdi Shojaei-Oghani & Mohammad Hasan Yavari

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  1. Mehdi Shojaei-Oghani
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  2. Mohammad Hasan Yavari
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Correspondence to Mohammad Hasan Yavari.

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Shojaei-Oghani, M., Yavari, M.H. Modeling the effects of interband and intraband transitions on phase and gain stabilities of quantum dot semiconductor optical amplifiers. Opt Quant Electron 50, 374 (2018). https://doi.org/10.1007/s11082-018-1644-4

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