• Chinese Journal of Lasers
  • Vol. 35, Issue s2, 81 (2008)
Zheng Di*, Pan Wei, Yan Lianshan, Luo Bin, Ye Jia, Yi Anlin, Jiang Ning, Ma Yanan, Zhang Jing, and Hunag Yujun
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  • [in Chinese]
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    Zheng Di, Pan Wei, Yan Lianshan, Luo Bin, Ye Jia, Yi Anlin, Jiang Ning, Ma Yanan, Zhang Jing, Hunag Yujun. Theoretical Study on Slow-Light Delays Using Broadband Incoherent Pumping Source[J]. Chinese Journal of Lasers, 2008, 35(s2): 81 Copy Citation Text show less

    Abstract

    We theoretically analyze characteristics of stimulated Brillouin scattering (SBS)-based slow light using a broadband incoherent and spectrally-sliced ASE source as the pump. Different from most previous literatures where only the delay characteristics of a single pulse are investigated, we concentrate on the transmission system performance when the slow light delay is incorporated. Under different spectrally sliced bandwidths and pump power levels, the output eye diagrams, the trends of the delay time and the Q factor are obtained through numerical analysis for both nonreturn-to-zero(NRZ) and return-to-zero(RZ) data formats modulated by 2.5-Gbit/s pseudo-random bit sequences. The results show that increasing the pump power and reducing the spectrally-sliced bandwidth are both beneficial to the generated delay, while the Q-factor may degrade due to more serious signal perturbation. By properly choosing the pump power and the spectrally-sliced bandwidth, we may optimize the Q-factor without sacrificing the delay time. Using a fiber Bragg grating (FBG) as the filter after the ASE source, we can easily obtain the pumping source with~GHz bandwidth therefore greatly reduce the system complexity and the cost, with the generated delay still comparable to conventional approaches.
    Zheng Di, Pan Wei, Yan Lianshan, Luo Bin, Ye Jia, Yi Anlin, Jiang Ning, Ma Yanan, Zhang Jing, Hunag Yujun. Theoretical Study on Slow-Light Delays Using Broadband Incoherent Pumping Source[J]. Chinese Journal of Lasers, 2008, 35(s2): 81
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