Optical Heterodyning for Reduction of Chromatic Dispersion Sensitivity in 60 GHz Mode-Locked Laser Systems

Rzaigui, Habeb; Poëtte, Julien; Cabon, B.; Brendel, Friederike; Khayatzadeh, Ramin

doi:10.1109/jlt.2013.2274871

Cited by 6 publications

(4 citation statements)

References 7 publications

(11 reference statements)

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“…According to (15), the performance of the RoF system based on PMLLD and ED is limited by the individual modes amplitude fluctuation power and the cross-power between amplitude fluctuation of two different modes.…”

Section: B Global Snr In Rof System Based On Pmlldmentioning

confidence: 99%

“…In [14], the impact of phase noise on different electrical down-conversion methods in RoF system based on PMLLD has been studied. The propagation effects in RoF system based on PMLLD are also presented in [15] and [16]. However, a complete study of amplitude noise impact, including the optical source noise, on Signal to Noise Ratio (SNR) and EVM, and also their comparison in RoF systems based on PMLLD and two DFB lasers have not yet been done, to our knowledge.…”

Section: Introductionmentioning

confidence: 99%

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Impact of Amplitude Noise in Millimeter-Wave Radio-Over-Fiber Systems

Khayatzadeh

Elwan

Poëtte

et al. 2015

J. Lightwave Technol.

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In this paper, a complete theoretical and experimental study of amplitude noise impact on performance of radio-overfiber (RoF) communication system in millimeter-wave (MMW) frequency band is presented. A simulation method is also presented, using which one can determine the origin of the amplitude noise which has the most impact on error vector magnitude (EVM). This method is based on analyzing the trends of EVM versus received optical power. The impact of different optical and electrical noise such as relative intensity noise, shot noise and thermal noise on EVM is precisely studied employing experimental and theoretical analysis. In the proposed RoF system, two techniques are used to generate MMW signal, and the EVM results are compared from amplitude noise viewpoint. In the first technique, two independent distributed feedback lasers are used to generate MMW signal at the output of a photodetector, and the second technique is based on a passively mode-locked laser diode. Impact of optical sources phase noise on performance of the system is removed using a noncoherent down-conversion method based on envelope detector. Using this method, a very good matching between the experimental and the simulation results is observed.Index Terms-Distributed feedback (DFB) laser, envelope detector, error vector magnitude (EVM), millimeter wave (MMW), passively mode-locked laser diode (PMLLD), phase noise, radioover-fiber (RoF), relative intensity noise (RIN), shot noise.

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Section: B Global Snr In Rof System Based On Pmlldmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impact of Amplitude Noise in Millimeter-Wave Radio-Over-Fiber Systems

Khayatzadeh

Elwan

Poëtte

et al. 2015

J. Lightwave Technol.

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“…Approach/Methods Discussed Pros Cons [8] Used parallel electro-optic modulation by using parallel electro-optic phase and intensity modulators Suitable for long reach RoF links Required costly hardware [9] Mode-locked lasers for mm-waves generation combined with MZM interferometer…”

Section: Literature Reviewmentioning

confidence: 99%

“…In order to compensate for such an impediment, the authors in [8] proposed an optical single-sideband (SSB) modulation scheme-called "collateral electro-optic modulation"-by using parallel electro-optic phase and intensity modulators. In [9], an approach to reduce the dispersion over a SMF channel consisting of mode-locked lasers for mm-waves' creation and transmission was proposed. A dispersion compensation fiber (DCF) to eliminate dispersion in an unlicensed band RoF channel with a 40 Gb/s data rate employing Quadrature Phase Shift Keying (QPSK) modulation in OFDM was proposed in [10], while in [11] the authors proposed a V-band mm-wave frequency of 57-66 GHz using field programming gate arrays (FPGAs) to restore the transmitted signal in a converged OFDM-RoF real-time reception system.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Different Channel Equalization Algorithms for a Converged OFDM-Based 5G mm-wave A-RoF System at 60 GHz

Farooq

Miliou

2022

Applied Sciences

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In this article, we simulate a converged 5G mm-wave analogue radio-over-fiber (A-RoF) system at 60 GHz, and perform offline signal processing to equalize the dispersive optical link with the three most frequently employed algorithms, i.e., the simple least mean square (LMS) algorithm, the constant modulus algorithm (CMA) and the adaptive median filtering (AMF), which are implemented in Matlab. The performances of the different algorithms are compared for various optical fiber lengths with respect to the EVM values obtained before and after equalization. In the case of QPSK in OFDM subcarriers, it is observed that the CMA algorithm performs better than the LMS and MF algorithms, with 2% and 1.4% EVM improvement respectively, while for 16QAM in OFDM subcarriers it is observed that the LMS algorithm has a very small improvement of 0.2% EVM compared to the MF algorithm, while CMA is not suitable for 16QAM modulation in the proposed converged 5G mm-wave A-RoF system at 60 GHz.

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