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低功耗片上无源光学二极管。

On-chip passive optical diode with low-power consumption.

作者信息

Liu Li, Yue Jin, Fan Xiaokang, Xue Wei

出版信息

Opt Express. 2018 Dec 10;26(25):33463-33472. doi: 10.1364/OE.26.033463.

Abstract

We propose and experimentally demonstrate an all-silicon passive optical diode with low-power consumption and high nonreciprocal transmission ratios (NTRs) based on cascaded opto-mechanical microring resonators (MRRs). As the oxide substrates of the opto-mechanical MRRs are removed, the nonlinear effects in the free-hanging waveguides could be efficiently activated by low optical powers. The operation principle of the optical diode is based on the asymmetric resonance red-shifts of the two MRRs in the forward and backward transmissions, which could be effectively induced by the nonlinear effects. In the experiment, with injecting an optical power low as 0.96 dBm, a high NTR of 33.6 dB and a relatively broad 20-dB bandwidth of 0.11 nm are achieved. The proposed passive optical diode is competent to process optical signals with dominant advantages of CMOS-compatibility, a compact footprint, low-power consumptions and high NTRs, which has significant applications for on-chip signal processing systems, such as logic gates and optical computing.

摘要

我们提出并通过实验证明了一种基于级联光机械微环谐振器(MRR)的低功耗、高非互易传输比(NTR)的全硅无源光学二极管。随着光机械MRR的氧化物衬底被去除,自由悬挂波导中的非线性效应可以通过低光功率有效地激活。光学二极管的工作原理基于两个MRR在正向和反向传输中不对称的共振红移,这可以由非线性效应有效诱导。在实验中,注入低至0.96 dBm的光功率时,实现了33.6 dB的高NTR和0.11 nm的相对较宽的20 dB带宽。所提出的无源光学二极管能够处理光信号,具有CMOS兼容性、紧凑的占地面积、低功耗和高NTR等显著优点,这对于片上信号处理系统,如逻辑门和光学计算,具有重要应用。

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