Signal processing based on stimulated Brillouin scattering (SBS) is limited by the narrow linewidth of the optoacoustic response, which confines many Brillouin applications to continuous wave signals or optical pulses longer than several nanoseconds. In this work, we experimentally demonstrate Brillouin interactions at the 150 ps time scale and a delay for a record 15 ns which corresponds to a delay of 100 pulse widths. This breakthrough experimental result was enabled by the high local gain of the chalcogenide waveguides as the optoacoustic interaction length reduces with pulse width. We successfully transfer 150ps-long pulses to traveling acoustic waves within a Brillouin-based memory setup. The information encoded in the optical pulses is stored for 15 ns in the acoustic field. We show the retrieval of eight amplitude levels, multiple consecutive pulses and low distortion in pulse shape. The extension of Brillouin-based storage to the ultra-short pulse regime is an important step for the realisation of practical Brillouin-based delay lines and other optical processing applications.

中文翻译：

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100 个脉冲宽度的布里渊光存储

基于受激布里渊散射 (SBS) 的信号处理受到光声响应的窄线宽的限制，这将许多布里渊应用限制为连续波信号或长度超过几纳秒的光脉冲。在这项工作中，我们通过实验证明了 150 ps 时间尺度的布里渊相互作用和创纪录的 15 ns 延迟，相当于 100 个脉冲宽度的延迟。这一突破性的实验结果是由于硫族化物波导的高局部增益实现的，因为光声相互作用长度随着脉冲宽度的减小而减小。我们成功地将 150ps 长的脉冲传输到基于布里渊的存储器设置中的行进声波。光脉冲中编码的信息在声场中存储 15 ns。我们展示了八个幅度水平的检索，多个连续脉冲和脉冲形状的低失真。将基于布里渊的存储扩展到超短脉冲范围是实现实用的基于布里渊的延迟线和其他光学处理应用的重要一步。