Graphene-assisted all-fiber phase shifter and switching
Graphene-assisted all-fiber phase shifter and switching
复制标题
石墨烯辅助全光纤移相器和开关
DOI：
10.1364/optica.2.000468
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发表时间：
2015-05-20
期刊：
影响因子：
10.4
通讯作者：
Zhao, Jianlin
中科院分区：
文献类型：
--
作者：
Gan, Xuetao;Zhao, Chenyang;Zhao, Jianlin
光控移相器由于其简单的实现和低成本而适用于光通信、传感器和信号处理。我们提出了一种由石墨烯光热效应辅助的全光纤移相器。在石墨烯涂层的微纤维中，石墨烯的欧姆加热可通过热光效应实现有效的纤维折射率变化和相移。在长度为 5 mm 的制造器件上，当由 980 nm (1540 nm) 光泵浦时，我们获得了超过 21 pi 的相移，几乎线性斜率为 0.091 pi/mW (0.192 pi/mW)，这使得全光开关具有 20 dB 的消光比和 10%-90% 后的上升（下降）时间为 9.1 ms (3.2 ms)。规则。这种石墨烯辅助的折射率变化和移相器具有全光纤、低功耗和易于制造的特点，可能为石墨烯在全光信号处理中的实际应用打开大门。 (C) 2015年美国光学学会
Optically controlled phase shifters are desirable for optical communication, sensors, and signal processing due to their simple implementation and low cost. We propose an all-fiber phase shifter assisted by graphene's photothermal effect. In a graphene-coated microfiber, graphene's ohmic heating promises efficient fiber index change and phase shift via the thermo-optic effect. On a fabricated device with a length of 5 mm, we obtain a phase shift exceeding 21 pi with a nearly linear slope of 0.091 pi/mW (0.192 pi/mW) when pumped by 980 nm (1540 nm) light, which enables all-optical switching with an extinction ratio of 20 dB and a rise (fall) time of 9.1 ms (3.2 ms) following the 10%-90% rule. This graphene-assisted index change and phase shifter featured with all-in-fiber, low power requirement, and ease of fabrication may open the door for graphene's realistic applications in all-optical signal processing. (C) 2015 Optical Society of America