Mitigation of Rayleigh backscattering in RoF-WDM-PON employing self coherent detection and bi-directional cross wavelength technique

Mandal, Paulomi; Mallick, Khaleda; Dutta, Bubai; Kuiri, Bibhatsu; Santra, Saikat; Patra, Ardhendu Sekhar

doi:10.1007/s11082-020-02720-y

Cited by 18 publications

(6 citation statements)

References 15 publications

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“…But with increase in transmission distance and transmission rate the, the value for D increases and hence performance of the system decreases. Also, at higher transmission rate causes spreading of optical pulses or inter-symbol interference (ISI) (Kumari et al 2020;Mandal et al 2021). Again, for the proposed fiber/VLC link the pulse broadening, ∆ using the expression ∆ = ∆ in ps where ∆ means spectral line width is 84 ps over 50 km wired and 10 m VLC link ranges at 10 Gbap data rate.…”

Section: Numerical Analysismentioning

confidence: 99%

“…In addition, DSP unit can also affect the performance of system in terms of long reach distance and high speed transmission capacity by minimizing fiber impairments such dispersion, non-linear effects and polarization losses. The impact of fiber nonlinearities because of the fiber transmission along with their mitigation utilizing the proposed CO-OFDM with DSP unit receiver are illustrated as follows (Kumari et al 2020;Mandal et al 2021) :…”

Section: Numerical Analysismentioning

confidence: 99%

“…Also, means the step size in one-tap normalized LMS filter in the DSP unit. Thus BER in m-QAM coherent transmission system can be expressed as (Mandal et al 2021;Xu 2017):…”

Section: Numerical Analysismentioning

confidence: 99%

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Performance analysis of symmetrical and bidirectional 40 Gbps TWDM-PON employing m-QAM-OFDM modulation with multi-color LDs based VLC system

2021

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In this work, a full-duplex time and wavelength division multiplexing-passive optical network (TWDM-PON) system is analysed. Orthogonal frequency division multiplexing (OFDM) with m-quadrature amplitude modulation (m-QAM) is employed to improve the performance of TWDM-PON for downstream and upstream transmission. Simultaneously, multi-color (390-750 nm) laser diodes (LDs) are employed for visible light communication (VLC) using various VLC links to encourage the information rate of fiber/VLC optical network. A TWDM-PON utilizing 16-, 32-and 64-QAM OFDM with ten LDs based VLC system has been analysed for full-duplex multi-color VLC signals of the system. The impact of the LDs input current and high transmission rate in the proposed PON/VLC link has been investigated for m-QAM OFDM modulation. The results show that the 40/40 Gbps 16-, 32-and 64-QAM signals over ten 8000 m VLC links and a 50 km fiber link are successfully transmitted at the modulation input current of 9 mA under bit error rate (BER) of 3.8×10 -3 .Also, the proposed system employing 16-, 32-and 64-QAM signals over a 10 km fiber and ten 10 m VLC links provide the maximum transmission rate of 120, 100 and 80 Gbps respectively. Moreover, the measured error vector magnitudes (EVMs) and calculated BER values for 16-QAM downstream and upstream signals, are well below the required FEC limit than high-order modulation formats. Further, the numerical analysis of the proposed system reveals the superiority of the proposed fiber/VLC links.

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Section: Numerical Analysismentioning

confidence: 99%

Section: Numerical Analysismentioning

confidence: 99%

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Performance analysis of symmetrical and bidirectional 40 Gbps TWDM-PON employing m-QAM-OFDM modulation with multi-color LDs based VLC system

2021

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“…If the downstream and upstream signals utilize the same wavelength for bidirectional connection, it would cause the Rayleigh backscattering induce interference noise at the photodiode (PD) of optical line termination (OLT) and ONU, respectively [13]. To prevent the RB noise in WDM access, using the wavelength-shift modulation scheme at each ONU [14], dual wavelength bands for data division [15][16][17] and various fiber access architecture [18,19] have been studied and discussed. In some cases, once two specific ONUs require confidential or personal signal connection and does not go through the OLT, a specific fiber deployment and additional transceiver (TRx) module are demanded to link the two ONUs [17,18].…”

Section: Introductionmentioning

confidence: 99%

Symmetry 28 Gbps/λ WDM Access Network Together With Confidential Connection Between Two Specific Clients

et al. 2021

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In this work, we demonstrate a symmetry 28 Gbps/ on-off keying (OOK) wavelengthdivision-multiplexing passive optical network (WDM-PON) architecture together with confidential connection between two specific optical network units (ONUs). The presented PON access network also can prevent the Rayleigh backscattering (RB) induced interference noise. Here, to avoid re-deployment of optical fiber and increase cost, a ring-based fiber connection is proposed to connect each ONU for personal information link, when the data connection between two ONUs can be changed arbitrarily. Moreover, the corresponding signal performances of the presented WDM-PON system are also studied and discussed.

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“…Moreover, with the increase of fiber transmission length increasingly, the RB-induced noise could be significant [18]. To mitigate the RB noise in WDM access network, several methods have been proposed, such as using the separating dual-band WDM wavelengths, electrical filtering effect, wavelength-shifted modulation, and special fiber network architecture [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Dual-Polarized WDM Access Network With Fiber to the Extension (FTTE) Connection

et al. 2021

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In this study, a symmetric polarization-division-multiplexing (PDM) wavelength-division-multiplexing passive optical network (WDM-PON) with fiber to the extension (FTTE) architecture is presented and investigated. The proposed PON can also avoid the Rayleigh backscattering (RB) interference noise. Here, each WDM wavelength can produce 25 Gbit/s on-off keying (OOK) and 10 Gbit/s OOK modulation channels simultaneously in x-and y-polarizations (Polx and Poly) through PDM method for 25 and 105 km single-mode fiber (SMF) transmissions without dispersion compensation. The measured minimal power budget of 25 and 10 Gbit/s downstream and upstream signals are 29 and 35.1 dB and 29.8 and 31.5 dB, respectively, at the forward error correction (FEC) target. Therefore, the proposed PDM WDM-PON architecture can not only offer symmetric 35 Gbit/s downstream and upstream connections by the dual-polarized wavelength, but also can avoid the RB-induced interference noise. In addition, the presented dualpolarized downstream signal also can provide information security in physical layer, when the unauthorized user occupies unlawfully.

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Mitigation of Rayleigh backscattering in RoF-WDM-PON employing self coherent detection and bi-directional cross wavelength technique

Cited by 18 publications

References 15 publications

Performance analysis of symmetrical and bidirectional 40 Gbps TWDM-PON employing m-QAM-OFDM modulation with multi-color LDs based VLC system

Performance analysis of symmetrical and bidirectional 40 Gbps TWDM-PON employing m-QAM-OFDM modulation with multi-color LDs based VLC system

Symmetry 28 Gbps/λ WDM Access Network Together With Confidential Connection Between Two Specific Clients

Dual-Polarized WDM Access Network With Fiber to the Extension (FTTE) Connection

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