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  • 1.
    Chin, Houman
    et al.
    RISE., Swedish ICT, Acreo.
    Mårtensson, Jonas
    RISE., Swedish ICT, Acreo.
    Forzati, Marco
    RISE., Swedish ICT, Acreo.
    Volterra based nonlinear compensation on 224 Gb/s PolMux-16QAM optical fibre link2012Inngår i: Optics InfoBase Conference Papers, 2012Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We demonstrate the performance of a nonlinear compensation scheme based on the Volterra Series on a 224 Gb/s PolMux-16QAM system over 250 km of fibre and comment on its improvement in performance over linear equalization.

  • 2.
    Duh, Emilija Stojmenova
    et al.
    University of Ljubljana, Slovenia.
    Papic, Marko
    University of Ljubljana, Slovenia.
    Kos, Andrej
    University of Ljubljana, Slovenia.
    Forzati, Marco
    RISE., Swedish ICT, Acreo.
    Cavenius, Håkan
    RISE., Swedish ICT, Acreo.
    Peckham, Clive
    Nièvre Numérique, France.
    Open innovation for delivering digital services with social and economic return on investment on the top of high speed broadband in rural Europe2016Inngår i: 2016 International Conference on Broadband Communications for Next Generation Networks and Multimedia Applications (CoBCom), 2016, artikkel-id 7593509Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This paper presents a work in progress done within an Interreg Europe project called ERUDITE. The aim of the project is to create a process that enables regional stakeholders across Europe to co-identify and co-design appropriate and innovative digital services on the top of high speed broadband, based on existing needs and a recognition of the social, economic and environmental value that they have the potential to generate to society as a whole.

  • 3.
    Forzati, Marco
    RISE., Swedish ICT, Acreo.
    Open FTTH networks and digital home-care services: Experiences from the Connected for Health Project2016Inngår i: 2016 18th International Conference on Transparent Optical Networks (ICTON), 2016Konferansepaper (Fagfellevurdert)
    Abstract [en]

    FTTH networks based on Open Access have been very common in Finland and especially Sweden in the past 10 - 15 years. In such networks, an operator-neutral network provider (NP) offers competing service providers access to the end users under non-discriminatory conditions. Among the advertised benefits of open FTTH networks is the development of an open market for high-quality digital societal services, such as e-health and e-social care. During the past six months, the EU Connected for Health project has run three pilots in Finland and Sweden, in which digital home-care services have been tested in live networks by municipalities and home-care givers. The pilots allowed to assess the socio-economic impact of fibre-based digital home-care services, in terms of costs, savings, and quality-of-life impact. During this talk we will present the final results of the study.

  • 4.
    Forzati, Marco
    et al.
    RISE., Swedish ICT, Acreo.
    Anders, Berntson
    RISE., Swedish ICT, Acreo.
    Mårtensson, J.
    RISE., Swedish ICT, Acreo.
    Ifwm suppression by asynchronous phase modulation2006Inngår i: 2006 European Conference on Optical Communications Proceedings, ECOC 2006, 2006Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We propose a cost-effective way to increase the non-linear tolerance of all channels in a 40-Gb/s WDM transmission system, which is shown to greatly improve the performance of RZ and especially NRZ transmission.

  • 5.
    Forzati, Marco
    et al.
    RISE., Swedish ICT, Acreo.
    Anders, Berntson
    RISE., Swedish ICT, Acreo.
    Mårtensson, J.
    RISE., Swedish ICT, Acreo.
    Davies, R. J.
    TRLabs,, Norway.
    Performance analysis of single-MZM APRZ transmitter2005Inngår i: IET Conference Publications, Institution of Engineering and Technology , 2005, nr CP502, s. 663-664Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We present the first numerical study of 67%-duty-cycle single-MZM APRZ, comparing it with 33% RZ, 33% APRZ and standard CSRZ. This transmitter is shown to combine CSRZ implementation simplicity with the improved nonlinear tolerance of π/2-APRZ.

  • 6.
    Forzati, Marco
    et al.
    RISE., Swedish ICT, Acreo.
    Anders, Berntson
    RISE., Swedish ICT, Acreo.
    Mårtensson, J.
    RISE., Swedish ICT, Acreo.
    Djupsjöbacka, Anders
    RISE., Swedish ICT, Acreo.
    IFWM suppression in NRZ transmission experiment at 40 Gb/s using asynchronous phase modulation2007Inngår i: Optics InfoBase Conference Papers, Optical Society of America , 2007Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The Asynchronous Phase Modulation (APM) scheme is experimentally studied for the first time. APM is shown to increase the power tolerance of NRZ-OOK over a 3x75-km link. © 2006 Optical Society of America.

  • 7. Forzati, Marco
    et al.
    Anders, Berntson
    RISE., Swedish ICT, Acreo.
    Mårtensson, J.
    RISE., Swedish ICT, Acreo.
    Pincemin, E.
    RISE., Swedish ICT, Acreo.
    Gavignet, P.
    RISE., Swedish ICT, Acreo.
    NRZ-OOK transmission of 16×40 Gb/s over 2800 km SSMF using asynchronous phase modulation2008Inngår i: 2008 Conference on Quantum Electronics and Laser Science Conference on Lasers and Electro-Optics, CLEO/QELS, 2008Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We use the cost-effective APM technique to increase the non-linear tolerance of NRZ-OOK, and we demonstrate, in a recirculating loop experiment, the transmission over 2800 km SSMF of 16 NRZ-OOK 40 Gb/s channels with 100 GHz spacing.

  • 8.
    Forzati, Marco
    et al.
    RISE., Swedish ICT, Acreo.
    Anders, Berntson
    RISE., Swedish ICT, Acreo.
    Mårtensson, J.
    RISE., Swedish ICT, Acreo.
    Pincemin, E.
    RISE., Swedish ICT, Acreo.
    Gavignet, P.
    RISE., Swedish ICT, Acreo.
    NRZ-OOK transmission of 16£40 Gb/s Over 2800 km SSMF using asynchronous phase modulation2008Inngår i: Optics InfoBase Conference Papers, Optical Society of America , 2008Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We use the cost-e®ective APM technique to increase the non-linear tolerance of NRZ-OOK, and we demonstrate, in a recirculating loop experiment, the transmission over 2800 km SSMF of 16 NRZ-OOK 40 Gb/s channels with 100 GHz spacing. © 2007 Optical Society of America.

  • 9.
    Forzati, Marco
    et al.
    RISE., Swedish ICT, Acreo.
    Anders, Berntson
    RISE., Swedish ICT, Acreo.
    Mårtensson, Jonas
    RISE., Swedish ICT, Acreo.
    IFWM Suppression Using APRZ with Optimized Phase-Modulation Parameters2004Inngår i: IEEE Photonics Technology Letters, ISSN 1041-1135, E-ISSN 1941-0174, Vol. 16, s. 2368-70Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We demonstrate experimentally as well as numerically that the alternate-phase return-to-zero modulation format increases the nonlinear tolerance of strongly dispersion-managed 40-Gb/s transmission. An analysis of phase misalignment is also presented.

  • 10.
    Forzati, Marco
    et al.
    RISE., Swedish ICT, Acreo, Broadband Technology.
    Anders, Berntson
    RISE., Swedish ICT, Acreo, Broadband Technology.
    Mårtensson, Jonas
    RISE., Swedish ICT, Viktoria.
    Polarisation Modulation Scheme for intra-channel non-linear suppression2007Patent (Annet (populærvitenskap, debatt, mm))
  • 11.
    Forzati, Marco
    et al.
    RISE., Swedish ICT, Acreo.
    Anders, Berntson
    RISE., Swedish ICT, Acreo.
    Mårtensson, Jonas
    RISE., Swedish ICT, Acreo.
    Davies, R. J.
    Performance Analysis of Single-MZM APRZ Transmitters2006Inngår i: IEEE transactions on intelligent transportation systems (Print), ISSN 1524-9050, E-ISSN 1558-0016, Vol. 24, s. 2006-14Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In this paper, an efficient single Mach-Zender modulator (MZM) implementation of alternate-phase return to zero (APRZ), which combines carrier-suppressed return to zero (CSRZ)'s ease of implementation with APRZ's nonlinear tolerance, is analyzed. In particular, the first numerical study of 67%-duty-cycle single-MZM APRZ over a 40-Gb/s 5 × 100-km link, in terms of nonlinear, dispersion, and filtering tolerance, comparing it with 33% RZ, 33% APRZ, and standard 67% CSRZ, is presented. The results show that APRZ with phase shift close to π/2 is the optimum choice, independent of specific transmitter implementation. A new mechanism is also discovered, based on the interference of ghost pulses with the original pulse train, which improves the nonlinear tolerance of CSRZ in a 40-Gb/s transmission

  • 12.
    Forzati, Marco
    et al.
    RISE., Swedish ICT, Acreo.
    Anders, Berntson
    RISE., Swedish ICT, Acreo.
    Mårtensson, Jonas
    RISE., Swedish ICT, Acreo.
    Djupsjöbacka, Anders
    RISE., Swedish ICT, Acreo.
    Asynchronous Phase Modulation for the Suppression of IFWM2007Inngår i: IEEE transactions on intelligent transportation systems (Print), ISSN 1524-9050, E-ISSN 1558-0016, Vol. 25, s. 2969-75Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Intrachannel four-wave mixing (IFWM) represents main source of impairments in fiber transmission at 40 Gb/s. A number of phase modulation techniques have been proposed to suppress the IFWM. In this paper, we study a cost-effective way of increasing the nonlinear tolerance of a 40-Gb/s wavelength division multiplexing transmission system by asynchronous phase modulation (APM). This can be achieved with one phase modulator placed after the wavelength multiplexer so that cost is shared by all channels. We show, by means of numerical simulations and laboratory experiments, that APM greatly improves the performance of ON-OFF-keying transmission.

  • 13.
    Forzati, Marco
    et al.
    RISE., Swedish ICT, Acreo.
    Anders, Berntson
    RISE., Swedish ICT, Acreo.
    Mårtensson, Jonas
    RISE., Swedish ICT, Acreo.
    Djupsjöbacka, Anders
    RISE., Swedish ICT, Acreo.
    Li, J.
    RISE., Swedish ICT, Acreo.
    Melin, S.
    40 Gbit/s field experiment over 820 km transmission link designed for 10 Gbit/s using APRZ modulation format2006Inngår i: Electronics Letters, ISSN 0013-5194, E-ISSN 1350-911X, Vol. 42, s. 991-92Artikkel i tidsskrift (Fagfellevurdert)
  • 14.
    Forzati, Marco
    et al.
    RISE., Swedish ICT, Acreo.
    Anders, Berntson
    RISE., Swedish ICT, Acreo.
    Mårtensson, Jonas
    RISE., Swedish ICT, Acreo.
    Djupsjöbacka, Anders
    RISE., Swedish ICT, Acreo.
    Li, J.
    RISE., Swedish ICT, Acreo.
    Melin, S.
    TeliaSonera AB, Sweden.
    Carlden, H.
    TeliaSonera AB, Sweden.
    40-gb/s field transmission through 540 km ssmf using the aprz modulation format2005Inngår i: Optics InfoBase Conference Papers, Optical Society of America , 2005Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We report the first field transmission experiment using the APRZ modulation format for 40-Gb/s transmission through 540 km SSMF, which confirms the improved nonlinear tolerance of APRZ. The optimum phase-modulation amplitude in this experiment is p/2. 

  • 15.
    Forzati, Marco
    et al.
    RISE., Swedish ICT, Acreo.
    Anders, Berntson
    RISE., Swedish ICT, Acreo.
    Mårtensson, Jonas
    RISE., Swedish ICT, Acreo.
    Pincemin, Erwan
    France Télécom, France.
    Gavignet, Paulette
    France Télécom, France.
    Transmission of 16x40 Gb/s NRZ-OOK Channels Over 2800 km SSMF Using Asynchronous Phase Modulation2009Inngår i: IEEE Photonics Technology Letters, ISSN 1041-1135, E-ISSN 1941-0174, Vol. 21, s. 131-33Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We use the cost-effective APM technique to increase the non-linear tolerance of NRZOOK, and we demonstrate, in a recirculating loop experiment, the transmission over 2800 km SSMF of 16 NRZ-OOK 40 Gb/s channels with 100 GHz spacing.

  • 16.
    Forzati, Marco
    et al.
    RISE., Swedish ICT, Acreo.
    Bianchi, A.
    Ericsson Telecomunicazioni SpA, Italy.
    Chen, J.
    KTH Royal Institute of Technology, Sweden.
    Grobe, K.
    KTH Royal Institute of Technology, Sweden.
    Lannoo, B.
    ADVA Optical Networking SE, Germany.
    MacHuca, C.
    IMinds, Belgium.
    Point, J. -C
    TUM, Germany.
    Skubic, B.
    JCP Consult, France.
    Verbrugge, S.
    JCP Consult, France.
    Weis, E.
    Ericsson AB, Sweden.
    Wosinska, L.
    Deutsche Telekom AG, Germany.
    Breuer, D.
    Deutsche Telekom AG, Germany.
    Next-generation optical access seamless evolution: Concluding results of the European FP7 Project OASE2015Inngår i: Journal of Optical Communications and Networking, ISSN 1943-0620, E-ISSN 1943-0639, Vol. 7, nr 2, s. 109-123, artikkel-id 7035551Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Increasing bandwidth demand drives the need for next-generation optical access (NGOA) networks that can meet future end-user service requirements. This paper gives an overview of NGOA solutions, the enabling optical access network technologies, architecture principles, and related economics and business models. NGOA requirements (including peak and sustainable data rate, reach, cost, node consolidation, and open access) are proposed, and the different solutions are compared against such requirements in different scenarios (in terms of population density and system migration). Unsurprisingly, it is found that different solutions are best suited for different scenarios. The conclusions drawn from such findings allow us to formulate recommendations in terms of technology, strategy, and policy. The paper is based on the main results of the European FP7 OASE Integrated Project that ran between January 1, 2010 and February 28, 2013. 

  • 17.
    Forzati, Marco
    et al.
    RISE., Swedish ICT, Acreo.
    Iyer, S.
    Anders, Berntson
    RISE., Swedish ICT, Acreo.
    Mårtensson, Jonas
    RISE., Swedish ICT, Acreo.
    Experimental study of single-MZM APRZ transmitters for fibre-optic communications2008Inngår i: Electronics Letters, ISSN 0013-5194, E-ISSN 1350-911X, Vol. 44, s. 148-49Artikkel i tidsskrift (Fagfellevurdert)
  • 18.
    Forzati, Marco
    et al.
    RISE., Swedish ICT, Acreo.
    Mattson, Crister
    RISE., Swedish ICT, Acreo.
    Socio-economic return of FTTH investment in Sweden, a prestudy2014Rapport (Annet vitenskapelig)
    Abstract [en]

    There is a wide range of FTTH initiatives throughout Sweden, with investments made by both telecom operators and public actors. The benefits of the investments are often discussed, especially when the investment is made by municipalities or other public bodies. This preliminary study analyses the socio-economic impacts of the investment in FTTH. The goal of the study was: Is it possible to calculate how much a krona (SEK) invested in fibre will give back to society? The conclusion is that a more comprehensive statistical data and more calculations are needed to give an exact estimate. The study, however, provides an indication that 1 SEK invested over four years brings back a minimum of 1.5 SEK in five years time. The study estimates the need for investment to achieve 100% fibre penetration, identifies and quantifies a number of significant effects of fibre deployment, and then calculates the return on investment. We recommend a more extensive study, in which the proposed model is refined and expanded with more detailed and updated data. This pre-study was sponsored by the Swedish Government’s Broadband Council (Bredbandsforum).

    Fulltekst (pdf)
    FULLTEXT01
  • 19.
    Forzati, Marco
    et al.
    RISE., Swedish ICT, Acreo.
    Mattsson, Christer
    RISE., Swedish ICT, Acreo.
    FTTH-enabled digital home care – A study of economic gains2014Inngår i: 2014 16th International Conference on Transparent Optical Networks (ICTON), 2014Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We analyse the extent of the annual net cost reductions stemming from the introduction of four FTTH- enabled digital services for home care, as recently introduced in the Swedish city of Västerås. In total, between 2014 and 2020, it is projected that Sweden could save up to between €3 and €6 billion if such services were massively deployed today. The cost reductions are analysed for three different types of municipality. The article also shows that there is a significant cost reductions potential for a less extensive (and more realistic) deployment scenario with only 10% of users using digital services.

  • 20.
    Forzati, Marco
    et al.
    RISE., Swedish ICT, Acreo, Broadband Technology.
    Mattsson, Christer
    Socio-economics return of FTTH investment in Sweden, a prestudy: En förstudie åt Bredbandsforum2011Rapport (Annet vitenskapelig)
    Fulltekst (pdf)
    fulltext
  • 21.
    Forzati, Marco
    et al.
    RISE., Swedish ICT, Acreo.
    Mattsson, Crister
    RISE., Swedish ICT, Acreo.
    Socio-economic effects of FTTH/FTTX in Sweden2012Inngår i: International Conference on Transparent Optical Networks, 2012, artikkel-id 6254453Konferansepaper (Fagfellevurdert)
    Abstract [en]

    In this paper we present some recent work we performed on the socio-economic impact of fibre access networks (FTTH/FTTx). We summarise some results from a pre-study on the effects of fibre deployments in Sweden. Specifically, we list and quantify savings in data and telecommunications costs for Swedish local governments, estimate the added values for fibre-connected citizens, and present a multivariate regression analysis of the early impact on employment and population evolution, building on data from 290 municipalities between 2007 and 2010: we find a weak but statistically significant correlation, and we are able to exclude backward causality.

  • 22.
    Forzati, Marco
    et al.
    RISE., Swedish ICT, Acreo.
    Mattsson, Crister
    RISE., Swedish ICT, Acreo.
    Twenty years of open fibre network in stockholm: A socio-economic study2013Inngår i: International Conference on Transparent Optical Networks, 2013, artikkel-id 6602829Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We analyse Stockholm City's fibre access network investment model and its effects on the different stakeholders, and for society at large. Moreover, Stockholm is compared to Copenhagen, which has conditions similar to Stockholm, but where the municipality has not taken an active role in the city's fibre network. The socio-economic return on the fibre infrastructure investment is estimated to over 16 billion SEK, or €1.85 billion at the current exchange rate (nearly three times the investment). This result is based on a few quantifiable effects alone and we expect the actual return to be considerably larger.

  • 23.
    Forzati, Marco
    et al.
    Ericsson Telecom AB, Sweden.
    Mårtensson, Jonas
    Ericsson Telecom AB, Sweden.
    Anders, Berntson
    Ericsson Telecom AB, Sweden.
    Djupsjöbacka, Anders
    Ericsson Telecom AB, Sweden.
    Johannisson, Pontus
    RISE., Swedish ICT, Acreo. Chalmers University of Technology, Sweden.
    Reduction of intra-channel four-wave mixing using the alternate-phase RZ modulation format2002Inngår i: IEEE Photonics Technology Letters, ISSN 1041-1135, E-ISSN 1941-0174, Vol. 14, nr 9Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    —The authors propose a modulation format in which the phase of the signal pulses alternates, in order to reduce the intrachannel four-wave mixing. They demonstrate numerically that the performance of a 40-Gb/s transmission link can be substantially improved.

  • 24. Haunstein, Herbert
    et al.
    Rohde, Harald
    Forzati, Marco
    Pincemin, Erwan
    Mårtensson, Jonas
    Djupsjöbacka, Anders
    RISE., Swedish ICT, Acreo.
    Politi, Tanya
    Combating Physical Layer Degradations: Chapter 62010Inngår i: Core and Metro Networks / [ed] Alexandros Stavdas, 2010, s. 381-Kapittel i bok, del av antologi (Annet vitenskapelig)
  • 25.
    Johannisson, Pontus
    et al.
    Chalmers University of Technology, Sweden.
    Anderson, D
    Chalmers University of Technology, Sweden.
    Marklund, Magnus
    Chalmers University of Technology, Sweden.
    Anders, Berntson
    Ericsson Telecom AB, Sweden.
    Forzati, Marco
    Ericsson Telecom AB, Sweden.
    Mårtensson, Jonas
    Ericsson Telecom AB, Sweden.
    Suppression of nonlinear effects by phase alternation in strongly dispersion-managed optical transmission2002Inngår i: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 27, nr 12Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The nonlinear effects of amplitude jitter and ghost pulse generation, which are present in strongly dispersion-managed optical communication systems can be suppressed by alternation of the phase of the bits. A physical explanation for this effect is given that shows that with suitably chosen phase modulations the processes that give rise to the nonlinear effects will counteract each other.

  • 26.
    Li, Jie
    et al.
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Forzati, Marco
    RISE - Research Institutes of Sweden, ICT, Acreo.
    The Social-Economic Impact of Fiber Broadband: A Hype or aReality?2018Konferansepaper (Annet vitenskapelig)
    Abstract [en]

    The social-economic impact of broadband has been studied extensively. The consensus is that basic broadband (from none or upgraded from 256 kbps to the order of 2 - 6 Mbps) indeed has positive impact on economic growth and performance in terms of e.g. GDP and employment. Nevertheless, studies on the social-economic impact of high-speed broadband access (20-30 Mbps and beyond) are far more controversial showing a mixed picture. In this paper, we investigated fiber broadband access impact on the employment rate, population evolution, reduced driving distance per capita and new company registrations at the municipality level in Sweden using multiple regression analysis. Based on the availability of historical fiber network deployment data, analyses can be carried out by regressing current values of social-economic indicators under study on the fiber penetration levels 4 years earlier, hence reverse causality in the regression analyses can be tackled effectively. Our results show that, given all the other significant factors remain the same and with at least 90% confidence interval, 10% increase of fiber broadband penetration would result in 0.17% population increase, 0.32% employment rate enhancement, 28.7 km reduced driving distance per capita per year, and one new company among 17857 inhabitants.

  • 27.
    Mårtensson, Jonas
    et al.
    RISE., Swedish ICT, Acreo.
    Anders, Berntson
    RISE., Swedish ICT, Acreo.
    Djupsjöbacka, Anders
    RISE., Swedish ICT, Acreo.
    Forzati, Marco
    RISE., Swedish ICT, Acreo.
    Li, Jie
    RISE., Swedish ICT, Acreo.
    Phase Modulation Schemes for Improving Intra-Channel Nonlinear Tolerance in 40 Gbit/s Transmission2003Inngår i: Conference on Optical Fiber Communication, Technical Digest Series, Institute of Electrical and Electronics Engineers Inc. , 2003, s. 662-663Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Several schemes for suppressing infra-channel non-linearities by introducing phase shifts between pulses are compared. Simulations and experiments show that sinusoidal phase modulation at 10 GHz provides a simple and effective means for improving the nonlinear tolerance in 40 Gbit/s transmission.

  • 28.
    Mårtensson, Jonas
    et al.
    Ericsson AB, Sweden.
    Li, J.
    Ericsson AB, Sweden.
    Anders, Berntson
    Ericsson AB, Sweden.
    Djupsjöbacka, Anders
    Ericsson AB, Sweden.
    Forzati, Marco
    Ericsson AB, Sweden.
    Suppression of intra-channel four-wave mixing by phase modulation at one quarter of bit rate2002Inngår i: Electronic Letters, Vol. 38, nr 23, s. 1463-65Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A proposed improvement of the nonlinear tolerance in 40 Gbit/s optical transmission by applying a 10 GHz phase modulation is presented. The improvement is obtained because intra-channel four-wave mixing (IFWM) is suppressed. It is shown, both by numerical simulations and experiments, that the penalty induced by IFWM is significantly reduced.

  • 29.
    Mårtensson, Jonas
    et al.
    Ericsson AB, Sweden.
    Li, Jie
    Ericsson AB, Sweden.
    Anders, Berntson
    Ericsson AB, Sweden.
    Djupsjöbacka, Anders
    Ericsson AB, Sweden.
    Forzati, Marco
    Ericsson AB, Sweden.
    Improvement of Nonlinear Tolerance in 40 Gbit/s Transmission by Phase Modulation at 10 GHz2002Inngår i: 2002 28TH European Conference on Optical Communication, 2002, Vol. 4Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We propose to suppress intra-channel four-wave-mixing (IFWM) in 40 Gbit/s optical transmission by applying a phase modulation at 10 GHz. Both numerical simulations and experiments show that the penalty induced by IFWM is significantly reduced

  • 30.
    Popp Larsen, Claus
    et al.
    RISE Research Institutes of Sweden, Digitala system, Prototypande samhälle.
    Balksjö, Therese
    RISE Research Institutes of Sweden, Digitala system, Prototypande samhälle.
    Forzati, Marco
    RISE Research Institutes of Sweden, Digitala system, Datavetenskap.
    Huss, Andreas
    RISE Research Institutes of Sweden, Digitala system, Prototypande samhälle.
    Apanasevic, Tatjana
    RISE Research Institutes of Sweden, Digitala system, Prototypande samhälle.
    Ytterbyn 2030: en scenarioanalys av framtidens uppkopplade samhälle och konsekvenser av utebliven fiberutbyggnad2021Rapport (Annet vitenskapelig)
    Abstract [sv]

    Följande rapport är skriven av RISE Research Institutes of Sweden, på uppdrag av Svenska Stadsnätsföreningen, med syftet att ge insyn i och förståelse för vilka möjligheter ett uppkopplat samhälle kan skapa samt å andra sidan hur ett samhälle kan påverkas om aktörer såsom offentlig sektor, enskilda individer och företag saknar en fullgod uppkoppling. Ett mål med rapporten är att öka förståelsen för vilka tekniska förutsättningar som krävs för att delta fullt ut det digitala samhället. Rapporten presenterar ett antal troliga framtidsscenarier kopplat till “framtidens smarta och uppkopplade samhälle” – där fiber ingår som en del av infrastrukturen – och tillhörande “motsatsscenarier” (beskrivna som “spegelscenarier”) – där fiber inte finns tillgängligt. Dessa scenarier utspelar sig år 2030 i en fiktiv by kallad Ytterbyn.

    Fulltekst (pdf)
    fulltext
  • 31.
    Roelens, M. A. F.
    et al.
    University of Southampton, UK.
    Forzati, Marco
    RISE., Swedish ICT, Acreo.
    Djupsjöbacka, Anders
    RISE., Swedish ICT, Acreo.
    Petropoulos, P.
    University of Southampton, UK.
    Anders, Berntson
    RISE., Swedish ICT, Acreo.
    Richardson, D. J.
    University of Southampton, UK.
    High quality pulse and device characterisation using EAM-based frequency resolved optical gating2005Inngår i: IET Conference Publications, Institution of Engineering and Technology , 2005, nr CP502, s. 397-398Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We report on the versatility of frequency resolved optical gating using an electro-absorption modulator to accurately characterise the pulse shape and phase of high speed telecommunication pulses, as well as properties of optical components.

  • 32.
    Roelens, M. A. F.
    et al.
    University of Southampton, UK.
    Petropoulos, P.
    University of Southampton, UK.
    Richardson, D. J.
    University of Southampton, UK.
    Forzati, Marco
    RISE., Swedish ICT, Acreo.
    Djupsjöbacka, Anders
    RISE., Swedish ICT, Acreo.
    Anders, Berntson
    RISE., Swedish ICT, Acreo.
    Linear frequency resolved optical gating as a line monitoring tool2006Inngår i: 2006 Optical Fiber Communication Conference, and the 2006 National Fiber Optic Engineers Conference, IEEE Computer Society , 2006Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We demonstrate the use of spectrograms for pulse monitoring. The technique can characterize the phase and intensity of data modulated pulses after transmission over a fiber span including a tunable dispersion compensating grating. © 2006 Optical Society of America.

  • 33.
    Toft, Fredrik
    et al.
    Chalmers University of Technology, Sweden.
    Rousk, Niclas
    Chalmers University of Technology, Sweden.
    Mårtensson, Jonas
    RISE., Swedish ICT, Acreo.
    Forzati, Marco
    RISE., Swedish ICT, Acreo.
    Olsson, Bengt Erik
    Ericsson, Sweden .
    Larsson-Edefors, Per
    Chalmers University of Technology, Sweden.
    Feasibility study of FPGA-based equalizer for 112-Gbit/s optical fiber receivers2012Inngår i: ISCAS 2012 - 2012 IEEE International Symposium on Circuits and Systems, 2012, s. 3234-3237, artikkel-id 6272013Konferansepaper (Fagfellevurdert)
    Abstract [en]

    With ever increasing demands on spectral efficiency, complex modulation schemes are being introduced in fiber communication. However, these schemes are challenging to implement as they drastically increase the computational burden at the fiber receiver's end. We perform a feasibility study of implementing a 16-QAM112-Gbit/s decision directed equalizer on a state-of-the-art FPGA platform. An FPGA offers the reconfigurability needed to allow for modulation scheme updates, however, its clock rate is limited. For this purpose, we introduce a new phase correction technique to significantly relax the delay requirement on the critical phase-recovery feedback loop.

1 - 33 of 33
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