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arXiv 1006.5380physics.opticsquant-ph
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宽带慢光器件中调制不稳定性与受激布里渊散射的竞争

Competition between the Modulation Instability and Stimulated Brillouin Scattering in a Broadband Slow Light Device

Yunhui Zhu, E. Cabrera-Granado, Oscar G. Calderon, Sonia Melle, Yoshitomo Okawachi, Alexander L. Gaeta, Daniel J. Gauthier

摘要:

我们观察到之间的竞争的调制不稳定性(MI)和受激布里渊散射(SBS)在9.2 GHz的宽带SBS慢光器件,其中一个标准的20公里长的单模LEAF光纤被用作SBS介质。当LEAF光纤在~1.55 μm波长处具有强色散时,MI占主导地位,并消耗了大部分泵浦功率。在基于LEAF光纤的系统中,MI的优势抑制了SBS增益,降低了SBS慢光延迟,并将SBS增益带宽限制在126 dB \cdot GHz。在色散位移的高非线性光纤中,由于MI的抑制,SBS慢光延迟得到改善,导致增益带宽积为344 dB \cdot GHz,受到我们可用的泵浦功率0.82 W的限制。

英文摘要:

We observe competition between the modulation instability (MI) and stimulated Brillouin scattering (SBS) in a 9.2-GHz broadband SBS slow light device, in which a standard 20-km-long single-mode LEAF fibre is used as the SBS medium. We find that MI is dominant and depletes most of the pump power when we use an intense pump beam at ~1.55 μm, where the LEAF fibre is anomalously dispersive. The dominance of the MI in the LEAF-fibre-based system suppresses the SBS gain, degrading the SBS slow light delay and limiting the SBS gain-bandwidth to 126 dB \cdot GHz. In a dispersion-shifted highly nonlinear fibre, the SBS slow light delay is improved due to the suppression of the MI, resulting in a gain-bandwidth product of 344 dB \cdot GHz, limited by our available pump power of 0.82 W.

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