| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Numerical Investigation and Optimization of SBS-Based Slow-Light Using Filtered Incoherent Pump |
| ZHENG Di, PAN Wei, YAN Lian-Shan, LUO Bin, ZOU Xi-Hua, WEN Kun-Hua, JIANG Ning |
| Center for Information Photonics and Communications, School of Information Science and Technology, Southwest Jiaotong University, Chengdu 610031 |
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| Cite this article: |
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ZHENG Di, PAN Wei, YAN Lian-Shan et al 2009 Chin. Phys. Lett. 26 124202 |
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Abstract The performance of stimulated Brillouin scattering (SBS)-based slow light using a novel spectrally-sliced broadband incoherent pump source is numerically studied. The profile of the pump-power spectrum is determined by the transmission spectra of the optical filter followed by the polarized broadband incoherent pump source. We also investigate the performance of Gaussian-type and super-Gaussian-type filtering under different spectrally-sliced
bandwidths and pump power levels for 2.5Gbit/s return-to-zero pulse (50% duty-cycle). The pulse broadening is characterized by the full width of half maximum (FWHM) and the rms pulse width, respectively. However,the results obtained by the two kinds of measurement methods deviate from each other with increasing pump power. Compared with the regular Gaussian-type filtering, the pulse broadening can be significantly reduced using super-Gaussian-type filtering at the cost of a small reduction in delay time. Furthermore, the maximum improvement in pulse broadening of ∆ BFWHM =28.4% and ∆ B RMS =10.4% is achieved by using a five-order super-Gaussian-type filter and a pump power of 500mW.
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| Keywords:
42.25.Bs
78.20.Bh
42.70.Nq
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Received: 17 February 2009
Published: 27 November 2009
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| PACS: |
42.25.Bs
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(Wave propagation, transmission and absorption)
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78.20.Bh
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(Theory, models, and numerical simulation)
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42.70.Nq
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(Other nonlinear optical materials; photorefractive and semiconductor materials)
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