Temporal multiplexing or demultiplexing of quantum signals would benefit from low-loss, high speed, high rate, and low noise switches. Fiber cross-phase-modulation based switches are a promising solution, but their maximum switching rate is usually limited by pump power limitations. We demonstrate the use of mid-stage pump-pulse re-timing to improve the pump-power efficiency and thus increase the maximum switching rates of such devices. The maximum average pump pulse rate of the switch is shown to increase by more than 50% to 800 MHz when employing pump-pulse retiming. We furthermore confirm the suitability of the switch for quantum signals by sending one of a pair of quantum-correlated photons through the switch while incurring no noticeable degradation of correlations.

中文翻译：

---

用于提高基于低噪声交叉相位调制的光纤开关中的开关速率的脉冲重定时

量子信号的时间复用或解复用将受益于低损耗、高速、高速率和低噪声开关。基于光纤交叉相位调制的开关是一种很有前途的解决方案，但它们的最大开关速率通常受泵浦功率限制。我们演示了使用中间级泵浦脉冲重新定时来提高泵浦功率效率，从而增加此类设备的最大开关速率。当采用泵浦脉冲重定时时，开关的最大平均泵浦脉冲速率增加了 50% 以上，达到 800 MHz。我们进一步通过开关发送一对量子相关光子中的一个来确认开关对量子信号的适用性，同时不会导致相关性明显下降。