arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1206.5337physics.optics
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打破谐振式光调制器的腔线宽限制

Breaking the cavity linewidth limit of resonant optical modulators

Wesley D. Sacher, William M. J. Green, Solomon Assefa, Tymon Barwicz, Huapu Pan, Steven M. Shank, Yurii A. Vlasov, Joyce K. S. Poon

摘要:

由于光调制器可以通过光的谐振循环来显著降低光发射机的功耗,因此在未来高性能计算系统和微处理器中,光调制器正被广泛地用于高能效的光子通信网络。然而,谐振调制器传统上遭受其功耗和最大操作比特率之间的权衡,这被认为是相反地取决于腔线宽。在这里,我们打破了这个线宽限制,使用硅microns。通过控制光进入和离开微腔的速率,我们证明了在高达40 GHz的频率下没有寄生腔线宽限制的调制,超过腔线宽的6倍。该设备工作在28 Gb/s,使用单端驱动信号小于1.5 V。结果表明,高Q谐振调制器可以被设计为同时低功耗和高速,功能是相互不兼容的典型谐振调制器研究的日期。

英文摘要:

Microring optical modulators are being explored extensively for energy-efficient photonic communication networks in future high-performance computing systems and microprocessors, because they can significantly reduce the power consumption of optical transmitters via the resonant circulation of light. However, resonant modulators have traditionally suffered from a trade-off between their power consumption and maximum operation bit rate, which were thought to depend oppositely upon the cavity linewidth. Here, we break this linewidth limitation using a silicon microring. By controlling the rate at which light enters and exits the microring, we demonstrate modulation free of the parasitic cavity linewidth limitations at up to 40 GHz, more than 6x the cavity linewidth. The device operated at 28 Gb/s using single-ended drive signals less than 1.5 V. The results show that high-Q resonant modulators can be designed to be simultaneously low-power and high-speed, features which are mutually incompatible in typical resonant modulators studied to date.

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