Optical DQPSK Modulation Performance Evaluation

Costa, Nelson; Cartaxo, Adolfo V. T.

doi:10.5772/8671

Cited by 4 publications

(10 citation statements)

References 15 publications

(21 reference statements)

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“…In the MC simulation, a sequence of bits of length N b corresponding to the information carried by the DQPSK selected signal is generated using deBruijn sequences (Jeruchim, 2000). The differential encoding and conversion to quaternary symbols with Gray coding follows (Ho, 2005) and (Costa, 2010). Then, the sequence of symbols is discretized in N a samples per symbol, which allows considering the signal waveform within a symbol period [for example, non-RZ (NRZ) or RZ pulses].…”

Section: Monte Carlo Simulationmentioning

confidence: 99%

See 1 more Smart Citation

Impact of Multi-Rate and Multi-Format Crosstalk Signals on the Performance of 40 Gbit/s DQPSK Optical Receivers

Rebola¹,

Cancela²,

Pires³

2014

Proceedings of 2nd International Conference on Photonics, Optics and Laser Technology

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The coexistence of signals with different modulation formats and different bit rates in metropolitan optical networks is, nowadays, a reality. In-band crosstalk can be very detrimental to the performance of those networks. In this work, the impact of in-band crosstalk due to multi-format and multi-rate signals on the performance of 40 Gbit/s DQPSK optical receivers is evaluated. It is shown that the worst interferer is the 10 Gbit/s OOK signal, which is the most common modulation format in today's optical networks.

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Section: Monte Carlo Simulationmentioning

confidence: 99%

“…After sampling, each received bit in its respective branch, which is corrupted by noise and crosstalk, is compared to the corresponding transmitted bit to find out if an error has occurred. The bit error probability (BEP) is, then, calculated from (Costa, 2010)…”

Section: Monte Carlo Simulationmentioning

confidence: 99%

Impact of Multi-Rate and Multi-Format Crosstalk Signals on the Performance of 40 Gbit/s DQPSK Optical Receivers

Rebola¹,

Cancela²,

Pires³

2014

Proceedings of 2nd International Conference on Photonics, Optics and Laser Technology

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“…Nonlinear absorption (NLA) materials exhibit linear transmittance below a specific input intensity or fluence level, but above this level, the output intensity varies nonlinearly with input. − Such optical pulse attenuation NLA materials play a major role in photonic technology, with uses in passive mode locking, pulse compression, and eye and sensor protection in optical systems (e.g., telescopes and night-vision systems). ,,− Chromophores that feature nonlinear absorption due to several mechanisms, including instantaneous two-photon absorption (TPA) combined with excited-state absorption (ESA) have optimal characteristics for broad-wavelength and temporal agile timescale pulse limiting. ,− …”

Section: Introductionmentioning

confidence: 99%

Polymeric Nonlinear Absorption Chromophore Array from Controlled Radical Polymerization and “Click” Chemistry

Chen

Liao

Price

et al. 2020

ACS Appl. Polym. Mater.

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A polyacrylate with pendant nonlinear absorption (NLA) chromophores was prepared via the reversible addition−fragmentation (RAFT)−click synthetic strategy. The polyacrylate backbone of the NLA polymer was constructed by reversible addition−fragmentation (RAFT) polymerization and subsequently modified to azide-containing "clickable polymers". Platinum acetylide chromophores that exhibit NLA via both two-photon absorption (TPA) and excited-state absorption (ESA) mechanisms were subsequently attached to the azide-substituted polyacrylate via copper(I)-catalyzed azide−alkyne cycloaddition. The resulting polymer exhibits similar photophysical properties to the platinum acetylide precursor chromophore, including steady-state absorption and emission, triplet−triplet transient absorption, and nonlinear absorption properties. In addition, the resulting polymers can be spin-coated to afford an optically transparent film, which also preserved the nonlinear absorption characteristics of the chromophores.

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“…The bandwidth of this filter is such that it eliminates the noise high-frequency components that are outside the signal bandwidth. A reasonable value for a 40 Gb/s NRZ-DQPSK link is 20 GHz [14] and, therefore, we will determine the NLPN spectral power density in this frequency range around the optical carrier frequency. Notice that the approximate analytical model fails to describe its behavior since we are assuming that the light source has negligible RIN and phase noise and, therefore, the NLPN is generated totally inside the SOA.…”

Section: Nlpn Behavior Of An Soa Power Boostermentioning

confidence: 99%

“…However, to the best of our knowledge [14], the PDF of a NRZ-DQPSK random data stream in the presence of phase noise has not been assed yet and so, all we can do is to calculate the OSNR [5,15] (the only noise we are considering is the NLPN): If we take the most unfavorable case of Fig. 6 (P in = 0.01), Eq.…”

Section: Soa Power Booster Optical Signal To Noise Ratiomentioning

confidence: 99%

On the correct modeling of semiconductor optical amplifier RIN and phase noise for optical phase shift keyed communication systems

Janer¹,

Connelly²

2010

Opt. Express

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Phase modulation schemes are attracting much interest for use in ultra-fast optical communication systems because they are much less affected by fiber nonlinearities than conventional modulation formats. Semiconductor optical amplifiers (SOAs) can be used to amplify and process phase modulated signals. However, existing SOA nonlinear phase noise (NLPN) models are simplistic and, sometimes, inaccurate. It is, therefore, important to correctly model their behavior since NLPN is the main drawback in these applications. In this paper we show that a more accurate model can be used leading to simple nonlinear noise expressions at the SOA output of differential phase shift keying systems. To demonstrate the utility of this model, we have used it to calculate the optical signal to noise ratio penalties introduced by a power booster SOA and the first inline amplifier of a 40 Gb/s NRZ-DQPSK single channel link. The model parameters have been estimated from measurements taken of a commercial SOA.

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Optical DQPSK Modulation Performance Evaluation

Cited by 4 publications

References 15 publications

Impact of Multi-Rate and Multi-Format Crosstalk Signals on the Performance of 40 Gbit/s DQPSK Optical Receivers

Impact of Multi-Rate and Multi-Format Crosstalk Signals on the Performance of 40 Gbit/s DQPSK Optical Receivers

Polymeric Nonlinear Absorption Chromophore Array from Controlled Radical Polymerization and “Click” Chemistry

On the correct modeling of semiconductor optical amplifier RIN and phase noise for optical phase shift keyed communication systems

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