Variable optical attenuator based on a reflective Mach-Zehnder interferometer
Variable optical attenuator based on a reflective Mach-Zehnder interferometer
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基于反射式马赫曾德干涉仪的可变光衰减器
DOI：
10.1016/j.optcom.2015.10.041
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发表时间：
2016-02-15
影响因子：
2.4
通讯作者：
Dai, Daoxin
中科院分区：
文献类型：
--
作者：
Chen, Sitao;Shi, Yaocheng;Dai, Daoxin
利用反射式马赫-曾德尔干涉仪（MZI）实现了一种低功耗的硅基可变光衰减器（VOA），该干涉仪由宽带高效布拉格光栅反射器构成，反射式MZI臂的两端分别安装有反射式MZI臂。本发明的反射式MZI VOA即使在2 X 2 3 dB耦合器不完全平衡时也能够固有地实现超高消光比，这使得实现VOA阵列非常稳健。与常规MZI型VOA相比，功耗降低了一半。对于制作的反射式MZI型VOA与125 μ m长的加热器，功耗仅为约10.8 mW的35.5 dB的高衰减。(C)2015 Elsevier B. V.版权所有。
A low power-consuming variable optical attenuator (VOA) on silicon is demonstrated by using a reflective Mach-Zehnder interferometer (MZI), which consists of broadband highly-efficient Bragg-grating reflectors at the ends of the MZI arms. The present reflective-MZI VOA enables an ultra-high extinction ratio intrinsically even when the 2 x 2 3 dB coupler is not balanced perfectly, which make it very robust to realize a VOA array. The power consumption is reduced by half in comparison with the regular MZI-type VOA. For the fabricated reflective MZI-type VOA with 125 pm-long heaters, the power consumption is only about 10.8 mW for a high attenuation of 35.5 dB. (C) 2015 Elsevier B.V. All rights reserved.