Nonlinear crosstalk and two countermeasures in SCM-WDM optical communication systems

Yang, Fan; Marhic, M.E.; Kazovsky, L.G.

doi:10.1109/50.838125

Cited by 69 publications

(25 citation statements)

References 14 publications

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“…In this paper, the LTERoF system utilizes a single wavelength in the C-band, which is transmitted through a single mode fiber (SMF); therefore XPM, FWM and SRS are clearly negligible [8,9]. Hence, the proposed system is only affected by SPM and SBS.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Optical Modulators in Optimized Nonlinear Compensated LTE RoF System

Kanesan

Ghassemlooy

et al. 2014

J. Lightwave Technol.

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This document may differ from the final, published version of the research and has been made available online in accordance with publisher policies. To read and/or cite from the published version of the research, please visit the publisher's website (a subscription may be required.)IEEE/OSA Journal of Lightwave Technology 1  Abstract-In this paper, we investigate a nonlinear compensation technique with two different architectures using direct modulation (DM) and external modulation (EM) techniques, termed as DM based frequency dithering (DMFD) and EM based frequency dithering (EMFD). We show that DMFD and EMFD methods operate substantially different in radio-over-fiber (RoF) system by optimizing the dithering technique relative to the LTE technology. The proposed techniques is only applicable if the condition of {f L < f d < f RF } is met, where f L represents the dithering boundary limit of 14 MHz, f d is DMFD signal frequency and f RF is the RoF carrier frequency. Analysis of the optical launch power for DMFD and EMFD methods reveal that the stimulated Brillouin scattering (SBS) threshold is above ~6 dBm for the LTE-RoF system. In addition, we also unveil that DMFD and EMFD methods do not introduce additional distortion for the linear and optimum optical launch power regions, which are frequency chirp driven regions. If the given condition is met, the proposed method improves the LTERoF system without any shortcoming. Finally, at 10 dBm launch power, DMFD and EMFD methods exhibits an average signal-tonoise ratio (SNR) gain of ~5.95 dB and ~7.71 dB, respectively. Index Terms-Long Term Evolution (LTE); Radio-over-fiber (RoF); Nonlinear Compensation; Optical OFDM (OOFDM) I. INTRODUCTIONThe actively growing end user subscriptions with bandwidth hungry, high specification, real-time, and delay-sensitive applications have been driving the mobile communications technology to continuously progress forward. The 3 rd generation partnership program (3GPP) established a standard known as the LTE to support the rapidly evolving mobile communication requirements [1].In the radio access network of LTE, eNodeB (eNB) functions as the base station (BS) similar to the global system Manuscript received April 29, 2013 for mobile communications (GSM) and universal mobile telecommunication system (UMTS) BSs. However, the eNB provides the real-time operation via a 2-node architecture, without an external central controller. The 2-node architecture is achievable because the eNB architecture is designed with built-in central controller with a radio access network, and such evolution leads to costly infrastructure expansion. In addition, the vastly allocated spectrums for LTE in urban locations throughout the world are either 2.6 GHz or 1.8 GHz [2] where the drawback is the excessive loss on the wireless propagation. As a result the eNB cell radius is limited to 1 km in urban operating conditions [3]. The throughput for the user equipment (UE) at the cell edge is <20 Mb/s from the maximum of 100 Mb/s owing to the deteriorating SNR, thu...

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Section: Introductionmentioning

confidence: 99%

Investigation of Optical Modulators in Optimized Nonlinear Compensated LTE RoF System

Kanesan

Ghassemlooy

et al. 2014

J. Lightwave Technol.

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“…In such a scenario the XPM crosstalk contamination imposed on the received signals in the pair of optical fibers are 180 0 out of phase and hence they would cancel out each other after their addition [87]. The disadvantage of this technique is the need to transmit the same signal through multiple fibers, thereby reducing the achievable throughput.…”

Section: J Overcoming the Effects Of Fiber Non-linearitymentioning

confidence: 99%

“…The detrimental effects of these phenomena can be greatly reduced by using constant-amplitude optical modulation schemes like optical frequency and optical phase modulation, which however requires additional components for photo-detection, as was discussed in Section III-B. Additionally, two basic techniques have been proposed in the literature for suppressing the effects of fiber non-linearity, including multiple fiber transmission [87] and carrier suppression [87]. Multiple fiber transmission is similar to the balanced photo-detection technique of Fig.…”

Section: J Overcoming the Effects Of Fiber Non-linearitymentioning

confidence: 99%

Performance Improvement and Cost Reduction Techniques for Radio Over Fiber Communications

Thomas

El‐Hajjar

Hanzo

2015

IEEE Commun. Surv. Tutorials

139

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Abstract-Advanced cost reduction and performance improvement techniques conceived for Radio Over Fiber (ROF) communications are considered. ROF techniques are expected to form the backbone of the future 5G generation of wireless networks. The achievable link performance and the associated deployement cost constitute the most salient metrics of a ROF architecture. In this paper, we commence by providing a rudimentary overview of the ROF architecture and then elaborate on ROF techniques designed for improving the attainable system performance. We conclude by describing the ROF techniques conceived for reducing the ROF system installation costs.

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“…Signal distortions in intensity-modulated direct detection WDM systems induced by interaction of fiber nonlinearity and dispersion were investigated [4]. Crosstalk between wavelengths in SCM-WDM optical communication systems has been studied [5]. It has been reported that in a dispersive fiber, crosstalk can be attributed to fiber nonlinearity combined with group velocity dispersion (GVD).…”

Section: Introductionmentioning

confidence: 99%

Crosstalk Analysis under the Impact of Line-width and Chirp in 8×10 GBPS WDM System Incorporating Optical Cross-Connector

Sharma¹,

Kaur²

2012

IJCA

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In this paper, a simulative experimental set up for OWDM communication system consist of two 4-optical channels with channel spacing of 0.1THz interconnected by means of a 2x2 OXC (an OXC with 2 input ports and 2 output ports) to route the data with less delay and high throughput is analyzed under the impact of laser line-width and modulator's chirp over the crosstalk introduced in OWDM system. Our results show that by using OXC, we can minimize the power degradation introduced in OWDM system due to crosstalk. In addition, the impact of laser line-width and modulator's chirp can not be ignored in reducing the crosstalk while dealing with long haul optical communication systems. The OWDM system is also reported under the influence of crosstalk at different bit rate varying from 1Gbps to 10Gbps in this work.

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Nonlinear crosstalk and two countermeasures in SCM-WDM optical communication systems

Cited by 69 publications

References 14 publications

Investigation of Optical Modulators in Optimized Nonlinear Compensated LTE RoF System

Investigation of Optical Modulators in Optimized Nonlinear Compensated LTE RoF System

Performance Improvement and Cost Reduction Techniques for Radio Over Fiber Communications

Crosstalk Analysis under the Impact of Line-width and Chirp in 8×10 GBPS WDM System Incorporating Optical Cross-Connector

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