Signal penalties induced by different types of optical filters in 100Gbps PM-DQPSK based optical networks

Pereda, José Antonio Martín; Horche, Paloma R.

doi:10.1016/j.osn.2015.07.001

Cited by 9 publications

(4 citation statements)

References 19 publications

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“…The normalized eye openings are functions of DGD and PSP and they range from 0 to 1. The 2 dB penalty is then used as a figure-of-merit that yield reliable operation of optical transmission system [21,22].…”

Section: Pmd Treoretical Evaluationmentioning

confidence: 99%

High-Speed Operation of Fiber-Optic Link Impaired by Wind Gusts

Dubovan

Litvik

Korcek

et al. 2021

2021 19th International Conference on Emerging eLearning Technologies and Applications (ICETA)

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The fast signal transmission is critical long-haul communication systems. They represent the key advancements, shaping information-communication technologies. Fiber-optic transmission suffers from many degradation effects, and of particular concern are stochastic fiber impairments represented by polarization mode dispersion (PMD). The PMD is critical as it limits link operation at data rates higher than 10 Gbps. In this work, we report on experimental measurements and theoretical analysis characterization for PMD-based propagation effects in optical fibers influenced by wind gusts. The study was performed on fiber-optic link that runs through 111km-long optical power ground wire cables. Measured maximum of DGD was up to 10 ps for a wind speed of 20 m/s. This wind condition, the optical link maintained a reliable operation only for established 10 Gbps, while considerable link degradation was seen for data rates of between 40 and 100 Gbps.

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Section: Pmd Treoretical Evaluationmentioning

confidence: 99%

High-Speed Operation of Fiber-Optic Link Impaired by Wind Gusts

Dubovan

Litvik

Korcek

et al. 2021

2021 19th International Conference on Emerging eLearning Technologies and Applications (ICETA)

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“…Optical NRZ signal with a specific bit rate is degraded by the PMD based on Equation ( 4 ). Then, the eye diagram opening,

, is defined as follows [ 48 , 49 ]:

where

is the minimum value of “1” bit and

is the maximum value of “0” bit.…”

Section: Theory Modeling and Experimentsmentioning

confidence: 99%

Impact of Wind Gust on High-Speed Characteristics of Polarization Mode Dispersion in Optical Power Ground Wire Cables

Dubovan

Litvik

Benedikovič

et al. 2020

Sensors

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Polarization mode dispersion is recognized as a key factor limiting optical transmission systems, particularly those fiber links that run at bit rates beyond 10 Gbps. In-line test and characterization of polarization mode dispersion are thus of critical importance to evaluate the quality of installed optical fibers that are in use for high-speed signal traffics. However, polarization-based effects in optical fibers are stochastic and quite sensitive to a range of environmental changes, including optical cable movements. This, in turn, gives rise to undesired variations in light polarization that adversely impair the quality of the signal transmission in the link. In this work, we elaborate on experimental testing and theoretical analysis to asses changes of polarization mode dispersion in optical fibers that are caused by environmental variations, here wind gusts in particular. The study was performed on commercially harnessed optical fibers installed within optical power ground wire cables, taking into account different weather conditions. More specifically, we showed that changes caused by wind gusts significantly influence the differential group delay and the principal state of polarization in those optical fibers. For this, we experimentally measured a number of parameters to characterize light polarization properties. Measurements were carried out on C-band operated fiber-optic link formed by 111-km-long power ground wire cables and 88 spectral channels, with a test time step of 1 min during 12 consecutive days. Variations in differential group delay allowed for sensitive testing of environmental changes with measured maxims up to 10 ps under the worst wind conditions. Moreover, measured parameters were used in a numerical model to assess the quality of transmitted high-bit-rate optical signals as a function of wind conditions. The analysis revealed a negligible impact of wind on a 10 Gbps transmission, while substantial influence was noticed for higher bit rates up to 100 Gbps. These results show promises for efficient sensing of environmental changes and subsequent monitoring of the quality of recently used fiber-optic link infrastructures.

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“…As signal propagates through the WSS, there can be a significant power penalty resulting from the filter. Due to the undesirable design, the filters can also induce optical crosstalk from the neighbouring channels [15]. Therefore, it is important to properly characterize the performance of the filter before implementing it in complex superchannels.…”

Section: Figure 3 Configuration Of Single Channel Transmission With P...mentioning

confidence: 99%

Impact of Analogue Pre-Filtering for Spectral Roll-off Improvement in Spectral Efficient Transmitter

Kaur

Gunning

2018

2018 20th International Conference on Transparent Optical Networks (ICTON)

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Spectral shaping plays a significant role in enabling high spectral efficiency of optical transmission systems. However, most of the spectral shaping methods reported so far have remained very complex using digital processing techniques that requires a large number of filter taps for optimal performance. In this paper, we show how the spectral roll-off factor can be reduced using a wavelength selective switch (WSS) at the transmitter side. We discuss the impact and limitations when using this method. The study investigates the practicalities of WSS generated optical filters at transmitter side via VPI simulations, evaluating the performance in terms of receiver sensitivity and BER.

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Signal penalties induced by different types of optical filters in 100Gbps PM-DQPSK based optical networks

Cited by 9 publications

References 19 publications

High-Speed Operation of Fiber-Optic Link Impaired by Wind Gusts

High-Speed Operation of Fiber-Optic Link Impaired by Wind Gusts

Impact of Wind Gust on High-Speed Characteristics of Polarization Mode Dispersion in Optical Power Ground Wire Cables

Impact of Analogue Pre-Filtering for Spectral Roll-off Improvement in Spectral Efficient Transmitter

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