Margin measurements in optical amplifier system

Bergano, Neal S.; Kerfoot, F.; Davidsion, C.R.

doi:10.1109/68.205619

Cited by 532 publications

(134 citation statements)

References 4 publications

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“…We placed the channels in correspondence of the left slope of the amplifier gain, thus, the higher the wavelength the higher the gain it undergoes. The effects on each channel have been evaluated by the Q-factor.Even if we deal with non gaussian noise, this parameter can be used to give a qualitative trend of the impairments [26]- [28]. We calculated the Q-factor from the empirical mean values and standard deviations on the electrical received signal.…”

Section: A Results From Simulations and Discussionmentioning

confidence: 99%

Evaluating SOA Nonlinearity Effects by High-Order Susceptibility on Constant Envelope Signals in WDM Systems

Betti

Duca

2009

J. Lightwave Technol.

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Abstract-Nonlinearity effects, arising within a semiconductor optical amplifier, have been deeply investigated with particular interest for exploiting them in wavelength conversion. This application shrinks the research area to a precise scenario: a strong pump signal travels through the active medium simultaneously with a modulated signal to be converted. In this case it is possible to neglect the spectral distribution of the optical power and phase relationship between propagating signals. SOAs have been also studied as line amplifiers for WDM phase modulated signals. Aim of this paper is to extend the propagation model in a SOA, in order to simulate nonlinearities occurring in the amplification of a WDM comb signal evaluating FWM on constant envelope modulation schemes (DPSK). This can be carried out thanks to an enanched analytical model based on the optical field and medium interaction, overcoming the wide-used Rate Equation approach, which is based on the overall photons density.

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Section: A Results From Simulations and Discussionmentioning

confidence: 99%

Evaluating SOA Nonlinearity Effects by High-Order Susceptibility on Constant Envelope Signals in WDM Systems

Betti

Duca

2009

J. Lightwave Technol.

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“…In the experiments, we obtained the factor from the margin measurements of the bit-error rate (BER) [10]. In order to focus on the behavior of the optical noise, we carefully subtract the electrical noise background, obtained from the back-to-back experiment, from the data measured at 10 000 km.…”

Section: Resultsmentioning

confidence: 99%

Statistics of the system performance in a scrambled recirculating loop with PDL and PDG

Sun

Lima

et al. 2003

IEEE Photon. Technol. Lett.

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Abstract-We have demonstrated that with the loop-synchronous scrambling technique, the distribution of a recirculating loop closely resembles that of a straight-line system. By carefully choosing the scrambling rate, we show that slow scrambling at the transmitter improves the system performance and reduces the performance variation. We investigate the system performance for different polarization-dependent loss (PDL) levels and obtain excellent agreement between the experimental and simulation results. Our results show, for the first time, that the repolarization of the noise due to significant PDL causes an asymmetric -factor distribution.

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“…Two EDFA's were used to increase optical signal power and a tunable bandpass optical filter is used to remove wide-band ASE noise from EDFA's. At the receiver, the system value was obtained by a BER-versus-decision-voltage (BERV) measurement [5]. The noise free signal waveform at the receiver was measured through the average of repeated 2 1 bit patterns.…”

Section: Methodsmentioning

confidence: 99%

Separation of noise from distortion for high-speed optical fiber system link budgeting

Hui

Vaziri

Zhou

et al. 1999

IEEE Photon. Technol. Lett.

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Abstract-In optical transmission systems and networks with in-line optical amplifiers, system performance degradations caused by random noise and optical path distortions are usually thought to be inseparable, which makes link performance evaluation complicated. We propose to use an optical system eye-mask parameterization technique to separate noise from distortion in the link budgeting. The basic idea of this approach is to find the worst-case path distortion factor which is independent of the noise characteristics and system implementations. Both theoretical development and experimental verification are discussed.Index Terms-Distortion, optical fiber communications, optical noise, optical system link budgeting.

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Margin measurements in optical amplifier system

Cited by 532 publications

References 4 publications

Evaluating SOA Nonlinearity Effects by High-Order Susceptibility on Constant Envelope Signals in WDM Systems

Evaluating SOA Nonlinearity Effects by High-Order Susceptibility on Constant Envelope Signals in WDM Systems

Statistics of the system performance in a scrambled recirculating loop with PDL and PDG

Separation of noise from distortion for high-speed optical fiber system link budgeting

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