Ultrafast Tunable Optical Delay Line Based on Indirect Photonic Transitions
Ultrafast Tunable Optical Delay Line Based on Indirect Photonic Transitions
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DOI：
10.1103/physrevlett.108.213901
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发表时间：
2012-05-21
影响因子：
8.6
通讯作者：
Krauss, Thomas F.
中科院分区：
文献类型：
--
作者：
Beggs, Daryl M.;Rey, Isabella H.;Krauss, Thomas F.
我们介绍了间接光子跃迁的概念，并演示了它在动态延迟线中的应用，以改变光脉冲的群速度。在超快时间尺度上运行，我们使用长度仅为300 μ m的慢光光子晶体波导，显示了高达20 ps的连续可调延迟。我们的方法是灵活的，因为脉冲流中的单个脉冲可以独立控制，我们通过操作仅间隔30 ps的脉冲来证明这一点。这里以30%的转换效率演示了两步间接转换。
We introduce the concept of an indirect photonic transition and demonstrate its use in a dynamic delay line to alter the group velocity of an optical pulse. Operating on an ultrafast time scale, we show continuously tunable delays of up to 20 ps, using a slow light photonic crystal waveguide only 300 mu m in length. Our approach is flexible, in that individual pulses in a pulse stream can be controlled independently, which we demonstrate by operating on pulses separated by just 30 ps. The two-step indirect transition is demonstrated here with a 30% conversion efficiency.