Design of All-Optical Modulation Format Converter From One 8PSK to Two QPSK Signals Based on Phase Sensitive Amplification in Elastic Optical Network

Liu, Hong; Wang, Hongxiang; Cui, Jiabin; Ji, Yuefeng

doi:10.1109/access.2019.2911311

Cited by 9 publications

(3 citation statements)

References 22 publications

(19 reference statements)

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“…In principle, for the case with different gain at each operating point, a similar analysis process may also be used in spite of complexity. In addition, it should be seen that our method can not only be useful for measuring the output OSNR of the all-optical regenerator but also applied to estimate the OSNR degradation induced by other nonlinear devices in optical communication links, such as all-optical modulation format conversion [21,22], all-optical wavelength conversion [23], etc. To summarize, the in-band measurement method proposed here has advantages in cost and adaptability over the traditional OSNR measurement in the optical domain.…”

Section: Resultsmentioning

confidence: 99%

In-Band OSNR Measurement Method for All-Optical Regenerators in Optical Domain

Wan

Wen

et al. 2019

Applied Sciences

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We propose an in-band measurement method of optical signal-to-noise ratio (OSNR) output from an all-optical regeneration system with a nonlinear power transfer function (PTF) according to the fact that there are different average gains of signal and noise. For the all-optical quadrature phase-shift keying (QPSK) regenerator as an example, the output OSNR is derived from the input OSNR and the total gain of the degraded QPSK signal. Our simulation shows that the OSNR results obtained by this method are in agreement with those calculated from the error vector magnitude (EVM) formula. The method presented here has good applicability for different data rates but is also useful for analyzing the OSNR degradation of other nonlinear devices in optical communication links. IntroductionWith the exponential growth of data information, optical communication networks are becoming more and more intelligent and elastic [1]. Optical performance monitoring (OPM), especially in optical signal-to-noise ratio (OSNR), will play an important role in optical link diagnosis, flexible bandwidth allocation, and fast network service deployment [2]. In high-speed long-haul optical transmission systems, amplified spontaneous emission (ASE) noise from erbium-doped fiber amplifier (EDFA) is one of the main factors resulting in the degradation of the transmitted signals. Different from fiber dispersion and nonlinearity, it cannot be eliminated by some compensation methods. In this case, all-optical regeneration technology has attracted much attention [3], especially to high-order modulation signal regeneration, such as multi-level amplitude regeneration based on nonlinear interference structure [4,5], multi-stage phase regeneration based on phase-sensitive four-wave mixing (FWM) [6,7], and several regeneration schemes of quadrature amplitude modulation (QAM) signals [8,9].Just like in-line EDFAs, all-optical regenerators are usually integrated into the intermediate nodes of optical links. However, most of the previous studies paid more attention to the regeneration performance in the electrical domain, instead of the optical domain. In other words, the OSNR improvement for all-optical regenerators is seldom considered in experiments due to a lack of more accurate OSNR measurement methods in the optical domain. As is well-known, the traditional OSNR measurement method used in WDM systems is based on the spectral interpolation technique by optical spectrum analysis [10]. Unfortunately, the use of optical filters or all-optical regenerators can give rise to the out-band distortion of the optical spectrum distribution, and then the validation of the interpolation measurement. Secondly, the coherent receivers are extensively used in high-order modulation systems such as those of quadrature phase-shift keying (QPSK) or QAM signals, so the performance of all-optical regenerators is often evaluated in the electrical domain as well. In fact, there are

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Section: Resultsmentioning

confidence: 99%

In-Band OSNR Measurement Method for All-Optical Regenerators in Optical Domain

Wan

Wen

et al. 2019

Applied Sciences

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“…De-aggregation techniques can realize the function of decomposing the high-order signal into multiple low-order signals. For example, eight-phaseshift-keying (8PSK) is decomposed into three s binary-phase-shift-keying (BPSK) signals using nonlinear effects in HNLF [7] , and 8PSK can also be decomposed into two QPSK signals using phase-sensitive amplification (PSA) [8] . One-to-one conversion includes both the conversion from lower-order to higher-order modulation and the functionality for converting from higher-order to lower-order modulation.…”

Section: Introductionmentioning

confidence: 99%

DP-OOK to QPSK conversion based on vector phase-sensitive amplification bridging core and access networks

Liu,

Cui,

2023

AOPC 2023: Optical Sensing, Imaging, and Display Technology and Applications; And Biomedical Optics

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“…In [14], the authors present a model that reduces the number of utilized spectrum slots compared with the conventional schemes. In [15], the authors have developed a flexible converter between modulation formats, which enables intelligent grooming techniques for an EON aimed at dynamical spectral efficiency allocation in optical fiber transmission.…”

Section: Introductionmentioning

confidence: 99%

Analytical Modeling of Switching Fabrics of Elastic Optical Networks

et al. 2020

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This article proposes an analytical method for determining the traffic characteristics of multi-service switching networks in elastic optical networks. The method takes into consideration the limitations of W-S-W (wavelength-space-wavelength) switching networks in the execution of multi-slot connections in line with the concept of elastic optical networks. The results obtained on the basis of the developed analytical model are compared with the results obtained from the simulation experiments for a selected structure of a switching network. The study confirms the high accuracy of the proposed model. The model can be used to optimize and evaluate the effectiveness of blocking optical switching networks. INDEX TERMS elastic optical networks, energy-aware systems, multi-service traffic, optical switches, switching network, traffic engineering.

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Design of All-Optical Modulation Format Converter From One 8PSK to Two QPSK Signals Based on Phase Sensitive Amplification in Elastic Optical Network

Cited by 9 publications

References 22 publications

In-Band OSNR Measurement Method for All-Optical Regenerators in Optical Domain

In-Band OSNR Measurement Method for All-Optical Regenerators in Optical Domain

DP-OOK to QPSK conversion based on vector phase-sensitive amplification bridging core and access networks

Analytical Modeling of Switching Fabrics of Elastic Optical Networks

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