Simultaneous All-Optical Channel Aggregation and De-Aggregation for 8QAM Signal in Elastic Optical Networking

Liu, Hong; Wang, Hongxiang; Ji, Yuefeng

doi:10.1109/jphot.2018.2884763

Cited by 18 publications

(4 citation statements)

References 19 publications

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“…Additionally, there have also been some reports talking about the all-optical format conversion (AOFC) and regeneration about standard shaped, star shaped and square shaped 8QAM signals, as shown in Fig. 1 (a)-(c) [2], [5], [7], [23], [24]. However, the rectangular shaped 8QAM signal has separate I/Q components and can be Gray coded, which has the advantage of simplifying the receiver, as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

All-Optical Format Conversion for Rectangular 8QAM Signals Based on Phase-Sensitive Amplification and Nonlinear Mach-Zehnder Interferometer

Li,

Yang,

Wen

et al. 2024

IEEE Photonics J.

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An all-optical format conversion (AOFC) scheme for the input 30 Gbit/s rectangular 8-ary quadrature amplitude modulation (8QAM) signal is proposed and numerically investigated based on phase-sensitive amplification (PSA) and nonlinear Mach-Zehnder interferometer (MZI). Firstly, the input rectangular 8QAM signal is orthogonal decomposed into the inphase and quadrature components based on PSA, respectively. The in-phase component is the 4-ary amplitude and phase shift keying (4APSK) signal and the quadrature component is the binary phase shift keying (BPSK) signal. Secondly, the converted 4APSK signal is transmitted into one piece of highly nonlinear fiber (HNLF) to obtain the phase-distorted two-amplitude and two-phase (2A-2P) signal based on the self-phase modulation (SPM) effect. After adjusting the power of the 2A-2P signal, it is injected into one nonlinear MZI to eliminate the amplitude difference of the inner and the outer rings of the 2A-2P signal. The 2A-2P signal can be converted into the regular quadrature phase shift keying (QPSK) signal by the nonlinear MZI with phase preservation. Thirdly, the converted BPSK and QPSK signals are coherently superposed in one 3-dB optical coupler (OC) to get the aggregated rectangular 8QAM signal and other types of 8QAM signals. The proposed scheme can also be extended to realize the AOFC from the 16-ary quadrature amplitude modulation (16QAM) signal to two QPSK signals. The constellation diagrams, amplitude and phase histograms, error vector magnitude (EVM) and bit error rate (BER) of the relevant optical signals are measured to evaluate the system performance. The proposed scheme can be equipped with the optical gateway to enable all-optical interconnection of optical networks with different modulation formats.

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Section: Introductionmentioning

confidence: 99%

All-Optical Format Conversion for Rectangular 8QAM Signals Based on Phase-Sensitive Amplification and Nonlinear Mach-Zehnder Interferometer

Li,

Yang,

Wen

et al. 2024

IEEE Photonics J.

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“…The all-optical network has the characteristics of all-optical domain information exchange [1]. It abandons the traditional photoelectric conversion mode, greatly improves the data transmission speed, and e ectively increases the capacity of information exchange.…”

Section: Introductionmentioning

confidence: 99%

An Optimal SDN-Based Wavelength Allocation and Routing Method for 5G Network

Zhou

Tian

Sefat

et al. 2022

Mobile Information Systems

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Optical networks are changing as new advanced technologies emerge. With each passing year, their sizes and capabilities expand. The standard architecture for network control and management cannot handle all of these complexities. The proliferation of cloud services and the massive volume of traffic provided by content delivery networks are driving the present fast increase in Internet traffic. This obviously exacerbates congestion concerns in communication networks, with a focus on the core and backbone components in particular. Software-defined networking (SDN) is evolving into a consolidated network management system that comprises a variety of strategies aiming at network management that are based primarily on one basic principle: decoupling control plane decisions from data plane activities. An essential resource allocation strategy in an all-optical network is routing and wavelength assignment. A novel SDN-based approach is proposed to address the problem of old methods mixed with new architecture in optical networks. The network resources were optimized for optimal scheduling using a binary hybrid topology particle swarm optimization method. In terms of recovery time, blockage rate, and resource consumption, simulation results demonstrate that the suggested technique outperforms previous classical methods.

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“…Specifically, the aggregation of two or more less complex, lower bit rate channels to a single higher bit rate channel can be performed all optically through coherent vector addition. Channel aggregation enables promising advances for the elastic optical networking (EON) [10,11] and near future fifth-generation (5G) technology [14] with the existing network architecture. Thus, aggregation gives an easy option to switch between simple and easy to generate modulation formats including OOK and BPSK in metro and local access networks (M/LAN) and higher modulation formats like QAM with improved transmission capacity in optical backbone networks.…”

Section: Introductionmentioning

confidence: 99%

“…Commonly, different nonlinear optical effects like four wave mixing (FWM), cross phase modulation (XPM), self-phase modulation (SPM), parametric amplification (PA), and cross gain modulation (XGM) arising from the second or third order susceptibility of highly nonlinear fiber (HNLF), periodically poled lithium niobate (PPLN) waveguide or semiconductor optical amplifiers (SOAs) have been used for channel aggregation [10,11,14,19,12,8,27,3,4,6,1]. In [10,11,1] for instance, aggregation of OOK and MPSK signals to a higher bit rate QPSK signals based on XPM using HNLF have been shown. QAM-8 signals have been generated by the aggregation of QPSK and OOK signals using XPM and XGM in SOA [1] and also from BPSK inputs using XPM and PA in HNLF [19,12].…”

Section: Introductionmentioning

confidence: 99%

Optical Channel Aggregation by Coherent Spectral Superposition with Electro-Optic Modulators

Misra¹,

Preußler²,

Singh³

et al. 2021

Preprint

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As the bit rates of routed data streams exceed the throughput of single wavelength-division multiplexing channels, spectral traffic aggregation becomes essential for optical network scaling. Here we propose a scheme for all-optical aggregation of several low bitrate channels to fewer channels with higher spectral efficiency. The method is based on optical vector summation facilitated by coherent spectral superposition. Thereby it does not need any optical nonlinearities and is based on linear signal processing with an electro-optic modulator. Furthermore, optical phase tuning required for vector addition can be easily achieved by a phase tuning of the radio frequency signal driving the modulator. We experimentally demonstrate the aggregation of two 10 Gbaud BPSK signals into one 10 Gbaud QPSK and one 10 Gbaud PAM-4 signal, the aggregation of two 10 Gbaud QPSK signals into 10 Gbaud QAM-16, as well as the aggregation of sinc-shaped Nyquist signals. The presented concept of in-line all-optical aggregation demonstrates considerable improvement in network spectrum utilization and can significantly enhance the operational capacity with reduced complexity. It provides a new way for realizing the flexible optical transmission of advanced modulation format signals, and suits for future dynamically reconfigurable optical networks. Since the method is based on linear signal processing with electro-optic modulator, integration into any integrated photonic platform is straight-forward.

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Simultaneous All-Optical Channel Aggregation and De-Aggregation for 8QAM Signal in Elastic Optical Networking

Cited by 18 publications

References 19 publications

All-Optical Format Conversion for Rectangular 8QAM Signals Based on Phase-Sensitive Amplification and Nonlinear Mach-Zehnder Interferometer

All-Optical Format Conversion for Rectangular 8QAM Signals Based on Phase-Sensitive Amplification and Nonlinear Mach-Zehnder Interferometer

An Optimal SDN-Based Wavelength Allocation and Routing Method for 5G Network

Optical Channel Aggregation by Coherent Spectral Superposition with Electro-Optic Modulators

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