All-optical XOR logic gate for 40Gb/s DPSK signals via FWM in a silicon nanowire

Centre for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS), Institute of Photonics and Optical Science (IPOS), School of Physics, The University of Sydney, NSW 2006, Australia.
Optics Express (Impact Factor: 3.49). 10/2011; 19(21):20364-71. DOI: 10.1364/OE.19.020364
Source: PubMed


We demonstrate an all-optical XOR logic function for 40Gb/s differential phase-shift keyed (DPSK) data signals in the C-band, based on four-wave mixing (FWM) in a silicon nanowire. Error-free operation with a system penalty of ~3.0dB and ~4.3dB at 10⁻⁹ BER is achieved.

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Available from: Chad Husko, Sep 18, 2014
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    • "All-optical signal processing chips have been demonstrated in silicon nanowires [1] and chalcogenide glass (ChG) waveguides [2] [3] including all-optical logic [4], demultiplexing from 160Gb/s [5] to over 1Tb/s [6] via four-wave mixing (FWM), all-optical performance monitoring using slow light at bit rates up to 640Gb/s [7] [8] [9], optical regeneration [10] [11], and many other processes. The third order nonlinear efficiency of alloptical devices can be improved dramatically by increasing the waveguide nonlinear parameter, γ =  n 2 / c A eff (where A eff is the waveguide effective area, n 2 the "
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    ABSTRACT: Nonlinear photonic chips have succeeded in generating and processing signals all-optically with performance far superior to that possible electronically - particularly with respect to speed. Although silicon-on-insulator has been the leading platform for nonlinear optics, its high two-photon absorption at telecommunications wavelengths poses a fundamental limitation. This paper reviews some of the recent achievements in CMOS-compatible platforms for nonlinear optics, focusing on amorphous silicon and Hydex glass, highlighting their potential future impact as well as the challenges to achieving practical solutions for many key applications. These material systems have opened up many new capabilities such as on-chip optical frequency comb generation and ultrafast optical pulse generation and measurement.
    Preview · Article · Oct 2014
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    • "research to improve the nonlinear performance of these devices [23]. Fast logic gates have also been implemented using other optical elements such as PPLN waveguides [24] and silicon nanowires [25]. However, these logic gates can only perform simple operations and efforts towards higher-scale processing are very scarce in literature. "
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    ABSTRACT: In this paper, we study the use of integrated semi-conductor optical amplifiers as the basic building block for larger-scale programmable photonic circuits. Making use of the non-linear response of these devices, we study the performance of 4-bit all-optical NOR gates based on fully integrable components for high speed all-optical look up tables. Feasibility of the proposed architecture is demonstrated by proof-of-concept experiments using both commercially available devices and photonic integrated circuits.
    Full-text · Article · Apr 2013 · Journal of Lightwave Technology
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    • "XOR gates for DPSK signals have been demonstrated using four-wave mixing (FWM) in semiconductor optical amplifiers (SOAs) but only limited receiver sensitivities has been obtained [5]. FWM-based XOR gates have also been investigated in different media such as highly nonlinear fibers (HNLFs), and silicon nanowires [6]. In this work, we focus on the use of SOAs as the input power requirements are lower compared to other passive media. "
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    ABSTRACT: All-optical network coding for path protection is experimentally demonstrated using four-wave mixing in SOAs for10 Gbit/s NRZ-DPSK signals with error free performance. The total power penalty after two cascaded XOR stage is only 2 dB.
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