Zhang Yu, Chen Jiming, Liu Shuai, Jin Wei, Cheng Siying, Zhang Yaxun, Liu Zhihai, Zhang Jianzhong, Yuan Libo
Opt Lett. 2022 Jul 15;47(14):3604-3607. doi: 10.1364/OL.462200.
Optical switches based on phase change materials have enormous application potential in optical logic circuits and optical communication systems. Integration of all-optical switching devices with optical fibers is a promising approach for realizing practical applications in enabling the optical fiber to transmit and process signals simultaneously. We describe an all-fiber nonvolatile broadband optical switch using an all-optical method. We use a single optical pulse to modulate the phase change material deposited on the tapered fiber to achieve logical control of the transmitted light. The response time of our optical switch is 80 ns for SET and 200 ns for RESET. Our optical switches can operate in the C-band (1530-1565 nm). The optical switching contrast is 40%. Our approach paves the way for all-optical nonvolatile fiber optic communication.
基于相变材料的光开关在光逻辑电路和光通信系统中具有巨大的应用潜力。将全光开关器件与光纤集成是一种很有前景的方法，可实现光纤同时传输和处理信号的实际应用。我们描述了一种使用全光方法的全光纤非易失性宽带光开关。我们使用单个光脉冲来调制沉积在锥形光纤上的相变材料，以实现对传输光的逻辑控制。我们的光开关的SET响应时间为80 ns，RESET响应时间为200 ns。我们的光开关可以在C波段（1530 - 1565 nm）工作。光开关对比度为40%。我们的方法为全光非易失性光纤通信铺平了道路。
