SBS threshold dependence on line coding in phase-modulated coherent optical systems

Consentino, A.; Iannone, E.

doi:10.1049/el:19890974

Cited by 7 publications

(5 citation statements)

References 1 publication

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“…In the case of phase modulated systems, the SBS threshold for a bit rate over 1 Gbit/s is on the order of a few Watts [22,23] so that SBS can be neglected. In the case of intensity modulated systems, the threshold for a bit rate higher than 1 Gbit/s is about 20-30 mW [22].…”

Section: Analysis Of Nonlinear Propagationmentioning

confidence: 99%

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Very High Capacity FDM Optical Transmission System based on Direct and Coherent Detection

Iannone¹,

Amoroso²

1996

Journal of Optical Communications

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In this paper the performance of FDM systems with a capacity of the order of a few hundreds of Gbit/s and a span up to 500 km is analysed by means of an analytical model. These systems can be important in the future high speed digital optical network.The comparison between IM-DD and coherend systems gives quite different results if transoceanic single channel systems or very high capacity FDM systems with a span of a few hundreds of km (300-500 km) are considered. While in the first case it is well known that IM-DD exhibits better performance the situation is different in the second case. Coherent systems exhibit better performance: up to 300 Gbit/s can be transmitted over a distance of 500 km adopting homodyne PSK technique.

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Section: Analysis Of Nonlinear Propagationmentioning

confidence: 99%

“…Another important characteristics of the optical field is its power spectral density E(f, z), that can be defined as τ η τ η Ξ(ί,ζ) = -L J J(u 0 (t,z)UO(t + T n 0 0 (23) where T n » T is a suitable normalisation interval.…”

Section: Selected Channel Statistical Characterisationmentioning

confidence: 99%

Very High Capacity FDM Optical Transmission System based on Direct and Coherent Detection

Iannone¹,

Amoroso²

1996

Journal of Optical Communications

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“…The average of n ( t ) can be assumed equal to zero and the variance n2 of its quadratures is given by + [ l pT(7 -~) h r F ( r ) h i F (~) d r d~ (8) where the first addendum, in which q is the electron charge, represents the shot noise contribution and the second addendum is the contribution of the electrical noise, whose statistical characteristics are represented by its autocorrelation function After the delay line detector and filtering by means of a baseband filter large enough not to distort the signal *hose role is to suppress the high frequency signal components, the baseband current is sampled at the center of each bit interval to evaluate the decision variable.…”

Section: A Transmitted Signalmentioning

confidence: 99%

High-speed DPSK coherent systems in the presence of chromatic dispersion and Kerr effect

Iannone

Locati

Matera

et al. 1993

J. Lightwave Technol.

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In this paper the error probability of a singlechannel coherent optical DPSK transmission system based on repeterless links in the presence of fiber chromatic dispersion and Kerr effect is evaluated. An accurate model for both the optical signal propagation and the probability distribution of the receiver decision variable is adopted by using a numerical solution of the non-linear Shrodinger equation and the characteristic function method. The obtained results show that the selection of an optimized IF filter bandwidth is crucial in order to obtain the best system performance. When chromatic dispersion dominates its combination with Kerr effect causes best performances to be achieved in normal dispersion region while, when Kerr effect is the most relevant limitation factor for the system performances, the lowest error probability is attained in anomalous regime. As a matter of fact in this regime Kerr effect and chromatic dispersion tends to partially compensate each other. In any case the error probability curves shows a relative minimum that is always attained in the anomalous region. Finally the maximum link length is limited by the presence of Kerr effect independently from the amount of transmitted optical power to be shorter than a threshold length if an error probability of is to be achieved.

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“…When the bit rate is very high and an appropriate modulation scheme is employed, the SBS can be suppressed to some extent [7,8]. However, in an ultra-long span system, the bit rate must usually be chosen relatively low in order to improve the receiver sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Spread-Spectrum FSK Coherent Optical Fiber Communications

Hirose¹,

Takushima²,

Okoshi³

1993

Journal of Optical Communications

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Spread-spectrum frequency-shift-keying (SS-FSK) coherent optical fiber communications is proposed. This is intended to realize a long-span optical fiber communication system by suppressing the stimulated Brillouin scattering (SBS) at a transmitter and using a heterodyne detection scheme at a receiver. Frequencysweeping spread-spectrum scheme combined with FSK modulation is newly developed. An experiment demonstrates that the bit-error-rate performance deteriorated by the SBS is recovered by the SS-FSK scheme. The resultant increase of the transmission power is beyond the power penalty caused by the SS process.

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SBS threshold dependence on line coding in phase-modulated coherent optical systems

Cited by 7 publications

References 1 publication

Very High Capacity FDM Optical Transmission System based on Direct and Coherent Detection

Very High Capacity FDM Optical Transmission System based on Direct and Coherent Detection

High-speed DPSK coherent systems in the presence of chromatic dispersion and Kerr effect

Spread-Spectrum FSK Coherent Optical Fiber Communications

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