System improvements in dense wavelength division multiplexing networks by using advanced optical modulation formats

Agalliu, Rajdi; Lucki, Michal

doi:10.1109/icton.2015.7193511

Cited by 7 publications

(7 citation statements)

References 10 publications

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“…This means that NOE influence other formats more critically than DB. Authors in [9] present similar results -DB yields better performance in comparison with NRZ-OOK and DPSK formats, but DPSK formats are slightly better than NRZ-OOK. However, differences in BER values between showed nine channels are small for all formats.…”

Section: Resultssupporting

confidence: 54%

“…3 illustrates BER values for each channel. We limited y-axis up to 12, which corresponds to BER of 10 −12 , because it is impossible to measure smaller BER values in practice [9]. Only using DB modulation, after transmission over 40 km fiber span all channels obtain BER smaller than 10 −9 .…”

Section: Resultsmentioning

confidence: 99%

“…Authors in [8] present that in 16 channel 40 Gbit/s TDMA-PON NRZ-OOK show slightly longer reach with the same BER than NRZ-DPSK. On the contrary, in [9] after transmission with 40 Gbit/s over 12 km standard single mode fiber (SSMF) RZ-DPSK and NRZ-DPSK demonstrated higher value of Q-factor than NRZ-OOK, but DB showed significantly better result. Different performance of modulation formats, as DPSK in above considered studies, confirms the necessity to evaluate performance of modulation format for specific type of system.…”

Section: Introductionmentioning

confidence: 98%

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Comparison of modulation formats for use in the next generation passive optical networks

Kurbatska

Alsevska

Gegere

et al. 2016

2016 Progress in Electromagnetic Research Symposium (PIERS)

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In this paper we are investigating the performance of different optical modulation formats in WDM-PON transmission system. On-off keying non-return-to-zero (NRZ-OOK), NRZ differential phase shift keying (NRZ DPSK), return-to-zero DPSK (RZ-DPSK, carrier-suppressed RZ DPSK (CSRZ-DPSK) and duobinary (DB) are reviewed. The diversity of different broadband services offered to internet users today, causes growing of individual user demands to internet traffic. To satisfy these demands, capability of access network has to be increased. That is why the problem of increasing data capacity of access networks is actual for implementers of data transmission networks. Since WDM-PON is one of new and promising solutions for access networks, we are investigating it in this research. In its turn, the choice of right modulation format is one of the ways to increase a capacity of transmission network. We use maximal achievable reach demonstrated by each optical modulation format for performance evaluation. To determine maximal reach, we investigate the longest distance, which allows providing data transmission with bit error rate (BER) less than 10 −9 for each modulation format. Our simulated WDM-PON system is 64 channel transmission system with 40 Gb/s speed, that corresponds to the requirements for next generation PON2 (NG-PON2). Our transmission system is based on arrayed waveguide grating (AWG) multiplexers and demultiplexers. We use dispersion compensating fiber (DCF) to improve signal quality. The simulations are implemented using OptSim 5.2 software. As a result, we figure out the modulation formats, which are able to provide maximal transmission distance in such way of WDM-PON system. In addition, we are comparing modulation formats in terms of BER simulating transmission over 40 km fiber span, according to NG-PON2 requirements.

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Section: Resultssupporting

confidence: 54%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

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Comparison of modulation formats for use in the next generation passive optical networks

Kurbatska

Alsevska

Gegere

et al. 2016

2016 Progress in Electromagnetic Research Symposium (PIERS)

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“…The results exhibited better BER of10 -10 [14]. The paper investigates currently used modulation formats such as NRZ, RZ, CSRZ and DB in terms of BER, Q factor, optical reach and distance, they analyzed under polarization effects, dispersion and spectral efficiency [15]. This paper reviews the different types of advanced modulation formats supported proposed architectures used to carry high capacity of 400 Gigabit Ethernet links.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Different Modulation Formats for Extended Reach NG-PON2 using RSOA

Shankar¹

2019

IJACSA

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Global market forecasts predicted that by 2020, more than 26 billion internet devices and connections universally interconnected will require nearly 3 times the data traffic generated when compared to the year 2015. The increase in data traffic, demands for enormous bandwidth capacity. The potential to deliver 10 Gbps of huge data to individual businesses and households will be of paramount importance and a challenging issue for the present day service providers. An intensive study is carried out for the Fiber-To-The-Home Passive Optical Network (FTTH PON) for their use in the optical communication, due to their high data rates and more bandwidth. The current evolution of Next Generation-Passive Optical Networks Stage 2 (NG-PON2) network is the primary key technology for the growing demands of higher bandwidth and transmission of the data to the subscribers present in the access network from the service providers. Time Wavelength Division Multiplexing PON (TWDM-PON) architecture is the viable essential solution for NG-PON2 which provides more bandwidth for bidirectional transmission. This article proposes a design for extended reach TWDM-PON based on reflective semiconductor optical amplifier (RSOA). The exclusive feature of the RSOA is the wavelength conversion, which replaces the transmitters in the subscriber end. The Quality of Service (QoS) performance is critically analyzed for different optical modulation formats in proposed extended reach TWDM-PON using RSOA. The TWDM-PON using RSOA is simulated and investigated for different photodetectors. The analysis is also carried for various distance and data rates. The results exhibited that APD receivers have better performance of minimum bit error rate obtained is 10 -11 and minimum Q factor is 6.2 when compared with PiN receivers. The comparative analysis of different modulation formats shows that the Carrier Suppressed Return to Zero-Differential Phase Shift Keying (CSRZ-DPSK) gives the best performance for longer distance and large data rates and Return to Zero(RZ) gives the least performance.

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“…We compare the performance of these formats (excluding CRZ and including CSRZ-DPSK) for 16 channel WDM-PON and longer distances, in addition investigating different channel spacing. Analogical approach is applied in [13], authors demonstrate that using DB format, the signal can be transmitted over 130 km long fiber span by using 25 GHz channel spacing. NRZ-DPSK can be transmitted over 100 km, but RZ-DPSK, CSRZ and NRZ over 70 km.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Maximum Available Reach for Different Modulation Formats in WDM-PON Systems

Kurbatska

Bobrovs

Spolītis

et al. 2016

Latvian Journal of Physics and Technical Sciences

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Considering the growing demand for broadband of access networks, in the present paper we investigate various modulation formats as a way of increasing the performance of optical transmission systems. Non-return-to-zero (NRZ) on-off keying, return-to-zero (RZ) OOK, carrier suppressed RZ (CSRZ) OOK, duobinary (DB), NRZ differential phase shift keying (NRZDPSK), RZ-DPSK and CSRZ-DPSK formats are compared using the maximal achievable reach with bit error rate less than 10 -9 as a criterion. Simulations are performed by using OptSim software tool. It is shown that using the transmission system without dispersion compensation the best results are shown by duobinary and CSRZ-OOK modulation formats, but with the system using dispersion compensating fiber (DCF) the longest transmission distance is achieved by RZ-DPSK modulation format. By investigating the influence of channel spacing for best-performed modulation formats, network reach decrease for transmission systems with DCF fiber has been observed due to channel crosstalk.

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System improvements in dense wavelength division multiplexing networks by using advanced optical modulation formats

Cited by 7 publications

References 10 publications

Comparison of modulation formats for use in the next generation passive optical networks

Comparison of modulation formats for use in the next generation passive optical networks

Investigation of Different Modulation Formats for Extended Reach NG-PON2 using RSOA

Investigation on Maximum Available Reach for Different Modulation Formats in WDM-PON Systems

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