Investigation of duobinary modulation implementations for use in wavelength switched networks

O'Dowd, J.; Ibrahim, Selwan K.; Bessler, Vivian; Ellis, A.D.

doi:10.1109/icton.2010.5549145

Cited by 3 publications

(4 citation statements)

References 8 publications

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“…One signal stream is modulated by MZM. Output of this modulator is used as a carrier wave for optical phase modulator when modulating the second signal stream [11], [12]. Launch power is -10 dBm (0.1 mw) for all transmitter configurations.…”

Section: The Simulation Model Of 10g-pon Ftth Systemmentioning

confidence: 99%

Simulation of Downlink of 10G-PON FTTH in the city of Košice

Huszaník

Turán

Ovseník

2018

Carpathian Journal of Electronic and Computer Engineering

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Optical fiber has the great advantages of capacity and reliability. That is why network providers started to deploy FTTx (Fiber-To-The-x) optical access using various PON (Passive Optical Network) architectures. The leading technology right now is Gigabit PON (GPON). However, with increasing amount of multimedia we need to further develop existing technologies to go on with these high demands. Fiber-To-The-Home (FTTH) using 10G-PON technology for broadband access application is effective solution for high speed networks with high capacity. In this paper, we look at the passive optical network in the city of Košice and based on the real network we created simulation model of downlink of 10G-PON based FTTH with triple-play service.

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Section: The Simulation Model Of 10g-pon Ftth Systemmentioning

confidence: 99%

Simulation of Downlink of 10G-PON FTTH in the city of Košice

Huszaník

Turán

Ovseník

2018

Carpathian Journal of Electronic and Computer Engineering

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“…Duobinary modulation is the simplest partial response coding method. Instead of transmitting Dk=0, 1 signal (in case of OOK) duobinary modulation transmits Dk-1+Dk so the original twolevel signal becomes a three-level signal with signal levels 0, 1 and 2 [18]. The structure of duobinary precoder is shown on Fig.…”

Section: Optical Duobinary Modulationmentioning

confidence: 99%

“…If there is even number of zero-level signals in between, polarization remains the same polarity. The main disadvantage of optical duobinary modulation is polarization mode dispersion (PMD) which can strongly impair the performance of system, especially when working at high bit rates (40 Gbps and more) [18], [19].…”

Section: Fig 4 Duobinary Precodermentioning

confidence: 99%

Utilization of 10 Gbps DWDM System with Duobinary Modulation into Passive Optical Network

Huszaník¹,

Turán²,

Ovseník³

2018

JCOMSS

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Passive optical networks are considered to be the most promising solution for future access networks. Growing demand for capability and high bit rate transmission has become an important part of metropolitan optical communication networks in recent years. Currently deployed 1 Gbps passive optical networks do not seem to be suitable for future demands. This paper deals with the utilization of 10 Gbps DWDM (Dense Wavelength Division Multiplex) in PON (Passive Optical Network) using simulation tool OptSim. The importance of advanced optical modulation is the key for the future high spectral efficiency DWDM passive optical networks. Optical duobinary modulation seems to be the main contender for the future DWDM-PON systems. Based on the real passive optical network we propose and demonstrate the novel 10 Gbps DWDM-PON solution implementing optical duobinary modulation as a future candidate for high speed passive optical networks. Performance of proposed 10 Gbps DWDM-PON with optical duobinary modulation and intensity modulation with direct detection is analyzed using BER (Bit Error Rate) and Q factor measurements.

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“…This allows BER results for a burst event to be generated at much greater speed than is possible using the gated error technique. The operation of this TRBER detector is demonstrated by characterising the switching performance of a fast switching slotted Fabry-Pérot (SFP) tuneable laser [3][4]. …”

mentioning

confidence: 99%

Implementation of a high speed time resolved error detector utilising a high speed FPGA

O'Dowd

Bessler

Ibrahim

et al. 2011

2011 13th International Conference on Transparent Optical Networks

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We demonstrate a time-resolved bit error rate detector utilising a field programmable gate array. The proposed detector offers 93 ps resolution operating at 10.7 Gb/s and allows for all the data received to contribute to the measurement allowing low bit error rates to be measured at high speed. Via synchronisation of both the detector and a high speed scope, the bit error rate and the corresponding individual eyes are identified. The operation of the detector is demonstrated by characterising a fast switching tuneable laser. INTRODUCTIONRecently there has been increasing interest in optical transmission systems that are capable of operating in burst mode. An important requirement for such burst mode systems is the ability to start transmitting data as quickly as possible after the network requests that a burst begin. In order to optimise the transient performance, associated with such burst operation it is important to accurately find the bit error rate (BER) at time intervals relative to the burst start time e.g. how long it takes for the BER to drop below the forward error correction (FEC) limit (i.e. BER = 1E-3). Such information allows for networks to be designed to be tolerant to the initial channel setup with minimal blanking times or to optimise more resilient FEC codes for use at the start of a burst window. As such it is necessary to measure the time-resolved BER (TRBER).A number of methods for measuring TRBER already exist. One such method involves carrying out an Exclusive OR (XOR) operation between an error free version of the transmitted data (i.e. transmitted from a stable transmitter) and a version of the transmitted data containing errors (i.e. due to burst mode operation) and then recording the output on a scope triggered using the burst trigger. This method has achieved a TRBER resolution of 10 ns [1], with data sets recorded at a few Hz. While the proposed method in [1] is reasonably fast it suffers from poor temporal resolution. Another TRBER method has been demonstrated using a standard BER test set with a time resolution of 2 ns having been shown by gating the error detector with the burst trigger. It is possible to improve the temporal resolution by moving the error gate in small steps i.e. 100 ps [2] and deconvolving the measurement window. Unfortunately [2] can only take a BER measurement at one time delay at a time making the measurement extremely slow.In this paper we demonstrate a TRBER detector utilising an FPGA which is capable of carrying out TRBER analysis on data transmitted at 10.7 Gb/s and return BER data with 93 ps resolution (corresponding to one bit slot). The time axis of the TRBER detector and the scope are both calibrated relative to each other so that measured BERs can be associated with an individual eye on a scope. It is also demonstrated that unlike gated error detection techniques which suffer from only measuring the BER in a small window at any one time the approach demonstrated in this paper allows for all data in a burst event to be recorded so that BER values for ...

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Investigation of duobinary modulation implementations for use in wavelength switched networks

Cited by 3 publications

References 8 publications

Simulation of Downlink of 10G-PON FTTH in the city of Košice

Simulation of Downlink of 10G-PON FTTH in the city of Košice

Utilization of 10 Gbps DWDM System with Duobinary Modulation into Passive Optical Network

Implementation of a high speed time resolved error detector utilising a high speed FPGA

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