Channel-selective wavelength conversion of quadrature amplitude modulation signal using a graphene-assisted silicon microring resonator

Long, Yun; Wang, Yi; Hu, Xiao; Ji, Mengxi; Shen, Li; Wang, Andong; Wang, Jian

doi:10.1364/ol.42.000799

Cited by 24 publications

(17 citation statements)

References 23 publications

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“…[ 8,25 ] The giant Kerr nonlinear response of 2D layered materials such as graphene, graphene oxide (GO), black phosphorus, and transition metal dichalcogenides (TMDCs) has been widely recognized and exploited to implement diverse nonlinear photonic devices with high performance and new capabilities. [ 25–35 ] In particular, a 6.8 dB enhancement in the FWM CE was reported for a silicon MRR incorporating a monolayer of doped graphene. [ 31 ]…”

Section: Introductionmentioning

confidence: 99%

2D Layered Graphene Oxide Films Integrated with Micro‐Ring Resonators for Enhanced Nonlinear Optics

Yang

et al. 2020

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Layered 2D graphene oxide (GO) films are integrated with micro‐ring resonators (MRRs) to experimentally demonstrate enhanced nonlinear optics. Both uniformly coated (1−5 layers) and patterned (10−50 layers) GO films are integrated on complementary‐metal‐oxide‐semiconductor (CMOS)‐compatible doped silica MRRs using a large‐area, transfer‐free, layer‐by‐layer GO coating method with precise control of the film thickness. The patterned devices further employ photolithography and lift‐off processes to enable precise control of the film placement and coating length. Four‐wave‐mixing (FWM) measurements for different pump powers and resonant wavelengths show a significant improvement in efficiency of ≈7.6 dB for a uniformly coated device with 1 GO layer and ≈10.3 dB for a patterned device with 50 GO layers. The measurements agree well with theory, with the enhancement in FWM efficiency resulting from the high Kerr nonlinearity and low loss of the GO films combined with the strong light–matter interaction within the MRRs. The dependence of GO's third‐order nonlinearity on layer number and pump power is also extracted from the FWM measurements, revealing interesting physical insights about the evolution of the GO films from 2D monolayers to quasi bulk‐like behavior. These results confirm the high nonlinear optical performance of integrated photonic resonators incorporated with 2D layered GO films.

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Section: Introductionmentioning

confidence: 99%

2D Layered Graphene Oxide Films Integrated with Micro‐Ring Resonators for Enhanced Nonlinear Optics

Yang

et al. 2020

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“…Recently, various optical signal processing functions have been presented using graphene-based devices, such as perfect absorption [276], phase shifter [277], polarizer [278], wavelength conversion [279][280][281], and optical computing [282,283]. Very recently, by introducing graphene into silicon photonic devices, the nonlinearities of these devices can be further improved, which is favorable for efficient on-chip nonlinear signal processing [284][285][286]. Here we introduce our recent progress in on-chip graphene-silicon photonic signal processing.…”

Section: On-chip Silicon+ Photonic Signaling and Processingmentioning

confidence: 99%

“…Additionally, the fabricated GSMR can be also used to demonatrate selective wavelength conversion of WDM signals [286]. wavelength of the GSMR, the desired channel of the WDM signal can be selected.…”

Section: On-chip Silicon+ Photonic Signaling and Processingmentioning

confidence: 99%

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On-chip silicon photonic signaling and processing: a review

2018

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“…Micro-Ring Resonators (MRRs) are one of the fundamental building blocks of SiP integrated circuits. Si MRRs have found applications in areas such as sensors [3], modulators [4] and filters [5]. A simple MRR consist of a ring waveguide evanescent-coupled to one or two straight waveguides.…”

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confidence: 99%

Tunable coupling-induced resonance splitting in a self-coupled silicon ring cavity with robust spectral characteristics

Pandey

Selvaraja

2017

Opt. Lett.

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We propose and demonstrate a self-coupled micro ring resonator for resonance splitting by mutual mode coupling of cavity mode and counter-propagating mode in Silicon-on-Insulator platform The resonator is constructed with a self-coupling region that can excite counter-propagating mode. We experimentally study the effect of selfcoupling on the resonance splitting, resonance extinction, and quality-factor evolution and stability. Based on the coupling, we achieve 72% of FSR splitting for a cavity with FSR 2.1 nm with ¡ 5% variation in the cavity quality factor. The self-coupled resonance splitting shows highly robust spectral characteristic that can be exploited for sensing and optical signal processing.Advances in Silicon photonics (SiP) has provided tremendous impetus to achieve the next generation high-speed short and long reach communication. It provides the advantages of optical transparency and large-bandwidth along with CMOS compatibility to deliver compact energy-efficient circuits [1]. Moreover, improvements in the fabrication technology has enabled low-loss waveguides and highly-uniform device response that was once considered a challenge in adapting SiP for practical applications [2].Micro-Ring Resonators (MRRs) are one of the fundamental building blocks of SiP integrated circuits. Si MRRs have found applications in areas such as sensors [3], modulators [4] and filters [5]. A simple MRR consist of a ring waveguide evanescent-coupled to one or two straight waveguides. Typically, MRRs have only forward propagating cavity modes at resonant wavelengths. However, in practice, any non-ideality in the resonator can result in the generation of counter-propagating modes in the cavity. The two primary sources of such non-idealities are sidewall roughness in the waveguides and non-unidirectional coupling between the bus and the ring waveguide. The sidewall roughness act as scattering points that redistributes the energy into counter-propagating mode, while coupling region between a ring and the straight waveguide can excite contra-directional modes because of reflections caused due to mode mismatch between the straight bus waveguide and the cavity mode [6,7]. Such counterpropagating modes result in resonance splitting and are referred to as Autler-Townes splitting

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Channel-selective wavelength conversion of quadrature amplitude modulation signal using a graphene-assisted silicon microring resonator

Cited by 24 publications

References 23 publications

2D Layered Graphene Oxide Films Integrated with Micro‐Ring Resonators for Enhanced Nonlinear Optics

2D Layered Graphene Oxide Films Integrated with Micro‐Ring Resonators for Enhanced Nonlinear Optics

On-chip silicon photonic signaling and processing: a review

Tunable coupling-induced resonance splitting in a self-coupled silicon ring cavity with robust spectral characteristics

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