Influence of Fiber-Bragg Grating-Induced Group-Delay Ripple in High-Speed Transmission Systems

Tipsuwannakul, Ekawit; Li, Jianqiang; Eriksson, Tobias A.; Egnell, L.; Sjöström, Fredrik; Pejnefors, J.; Andrekson, Peter A.; Karlsson, Magnus

doi:10.1364/jocn.4.000514

Cited by 11 publications

(3 citation statements)

References 11 publications

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“…The DCMs are placed directly after the EDFAs that are preceding the fiber spans, as no extra EDFAs are then needed. It is important to note that the DCMs themselves inflict no nonlinear distortions [35]. The center channel is detected using a coherent receiver based on an integrated polarization-diverse optical hybrid with balanced photo-detectors as depicted in Fig.…”

Section: Methodsmentioning

confidence: 99%

Impact of 4D Channel Distribution on the Achievable Rates in Coherent Optical Communication Experiments

Eriksson

Fehenberger

Andrekson

et al. 2016

J. Lightwave Technol.

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We experimentally investigate mutual information and generalized mutual information for coherent optical transmission systems. The impact of the assumed channel distribution on the achievable rate is investigated for distributions in up to four dimensions. Single channel and wavelength division multiplexing (WDM) transmission over transmission links with and without inline dispersion compensation are studied. We show that for conventional WDM systems without inline dispersion compensation, a circularly symmetric complex Gaussian distribution is a good approximation of the channel. For other channels, such as with inline dispersion compensation, this is no longer true and gains in the achievable information rate are obtained by considering more sophisticated four-dimensional (4D) distributions. We also show that for nonlinear channels, gains in the achievable information rate can also be achieved by estimating the mean values of the received constellation in four dimensions. The highest gain for such channels is seen for a 4D correlated Gaussian distribution.

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Section: Methodsmentioning

confidence: 99%

Impact of 4D Channel Distribution on the Achievable Rates in Coherent Optical Communication Experiments

Eriksson

Fehenberger

Andrekson

et al. 2016

J. Lightwave Technol.

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“…Chromatic dispersion, also known as material dispersion, can be successfully compensated by using different methods such as DCF [18], chirped Bragg grating [27] and phase conjugation [28]. In this study we are using DCF to compensate for dispersion and we have upgraded and optimised the RF configuration scheme from basic to more advanced in order to investigate its performance.…”

Section: Dispersion Compensation Schemementioning

confidence: 99%

Optimisation of dispersion compensating in a long-haul fibre for RF transmission of up to 100 Gbit/s by using RZ and NRZ formats

Paloi

Mirza

Haxha

2017

Optik

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With the recent data rate increase it is very challenging to build a fibre optic network that would enable a high data rate transmission over a long haul distance. The signal suffers large degradation over a certain distance due to distortion by the nonlinear effects of the optical fibres. In particular, transmission of high data rates over existing fibre optic systems, while keeping the cost low, avoiding an increase of the system's complexity and the usage of expensive devices, would be a very challenging task. In this paper, we address this problem by increasing the transmission distance in the fibre optic links for up to 2500km. We have used Standard Single Mode Fibre (SSMF) and Dispersion Compensation Fibre (DCF), where DCF is used as a loss compensator in Radio-Over-Fibre (RoF) systems. A mixture combination of the pre, post and symmetrical fibre compensation schemes were developed to overcome the dispersion in the fibre. We have found that in order to achieve high RF over fibre optic system performance for high data rates and long transmission, there is a requirement to upgrade the optical configuration scheme in a proportional way, by raising the length of the fibre span, compensation span and amplification. We have reported optimised RF over fibre configuration schemes that would have a great impact on reducing the cost, reducing the system's complexity and avoiding usage of expensive devices, in order to achieve high data rate transmission over existing fibre optic systems.

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“…The transmission link consisted of 100 km standard single mode fiber (SSMF) with idealized dispersion compensating fiber (DCF) for dispersion compensation. The requirement for the pre-compensation stage to induce negligible nonlinear distortion could be met by utilizing chirped fiber Bragg gratings for the pre-compensation stage [27]. The link was fully dispersion compensated but the ratio of pre-and post-compensation could be varied.…”

Section: A System Modelmentioning

confidence: 99%

Phase-Sensitive Amplified Transmission Links for Improved Sensitivity and Nonlinearity Tolerance

Olsson

Corcoran

Lundström

et al. 2015

J. Lightwave Technol.

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In this paper, we investigate the properties of transmission links amplified by phase-sensitive amplifiers (PSAs). Using an analytic description, we explain the principles enabling improved sensitivity compared to conventional links amplified by phase-insensitive amplifiers (PIAs) and mitigation of nonlinear transmission distortions. We demonstrate these features using numerical simulations, and in particular, we show the possibility of efficiently mitigating both self-phase modulation (SPM)-induced distortions and nonlinear phase noise (NLPN) if the link dispersion map is optimized. The properties of the noise on signal and idler are important and to enable NLPN mitigation, the noise must be correlated at the link input. We investigate the role of the dispersion map in detail and show that in a link with standard single mode fiber (SSMF) the optimum dispersion map for efficient nonlinearity mitigation corresponds to precompensation of an amount equal to the effective loss length. Furthermore, we experimentally demonstrate both improved sensitivity and mitigation of nonlinearities in a 105 km PSA-amplified link transmitting 10 GBd 16-ary quadrature amplitude modulation (16QAM) data. We measure a combined effect allowing for more than 12 dB larger span loss in a PSA-amplified link compared to a conventional PIA-amplified link to reach the same bit error ratio (BER) of 1 × 10 −3 .

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Influence of Fiber-Bragg Grating-Induced Group-Delay Ripple in High-Speed Transmission Systems

Cited by 11 publications

References 11 publications

Impact of 4D Channel Distribution on the Achievable Rates in Coherent Optical Communication Experiments

Impact of 4D Channel Distribution on the Achievable Rates in Coherent Optical Communication Experiments

Optimisation of dispersion compensating in a long-haul fibre for RF transmission of up to 100 Gbit/s by using RZ and NRZ formats

Phase-Sensitive Amplified Transmission Links for Improved Sensitivity and Nonlinearity Tolerance

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