Coherent Ultra Dense WDM Technology for Next Generation Optical Metro and Access Networks

Rohde, Harald; Gottwald, E.; Teixeira, A.; Reis, Jacklyn D.; Shahpari, Ali; Pulverer, Klaus; Wey, Jun Shan

doi:10.1109/jlt.2014.2316369

Cited by 95 publications

(48 citation statements)

References 23 publications

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“…Finally, the nonlinearities, which do not depend on the number of active wavelengths for a number greater than 64, limit the feeder power per channel below -2 dBm [33]. Table XII illustrates the feeder power per channel in the trunk of the ODN leaving the OLT, for both proposed OLT designs.…”

Section: System Reach Power Safety and Nonlinearitiesmentioning

confidence: 99%

UDWDM-PON Using Low-Cost Coherent Transceivers With Limited Tunability and Heuristic DWA

Sales¹,

Segarra²,

Polo³

et al. 2016

J. Opt. Commun. Netw.

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Section: System Reach Power Safety and Nonlinearitiesmentioning

confidence: 99%

UDWDM-PON Using Low-Cost Coherent Transceivers With Limited Tunability and Heuristic DWA

Sales¹,

Segarra²,

Polo³

et al. 2016

J. Opt. Commun. Netw.

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“…The OLT receiver is the same configuration that is used at the ONU but with different LO source (TLS) and power (PLO=0dBm). In a real implementation, the OLT could be implemented using as much transceivers as users or share > REPLACE THIS LINE WITH YOUR PAPER IDENTIFICATION NUMBER (DOUBLE-CLICK HERE TO EDIT) < 2 the OLT unit between several users and so reduce the cost [2,8].…”

Section: Setupmentioning

confidence: 99%

“…1. In this context, flexible and coherent ultra-Dense Wavelength Division Multiplexing (uDWDM) metro-access networks are the most promising alternative to the current Time Division Multiplexing (TDM) optical networks due to its transparency and high spectral efficiency [2]. However, cost-effective devices have to be researched and developed in order to address the requirements of users and vendors [3].…”

Section: Introductionmentioning

confidence: 99%

Cost-Effective Transceiver Based on an RSOA and a VCSEL for Flexible uDWDM Networks

Altabás

Izquierdo

Lazaro

et al. 2016

IEEE Photon. Technol. Lett.

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Abstract-A cost-effective transceiver for a 1Gbps full-duplex uDWDM optical link is proposed for flexible metro-access and 5G networks. The transceiver is based on a VCSEL, which is used as the LO for a heterodyne receiver and also feeds a phasemodulated RSOA transmitter. The modulation format used in the RSOA is a NRZ-DPSK for the uplink while the downlink is based on a Nyquist DPSK format. The central frequencies of the links are 2GHz separated and both links can be placed inside a 6.25GHz frequency slot. The sensitivity of this transceiver is -43.5dBm over a 50km fiber.

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“…Moreover such systems require complex DSP based algorithms leading to computation complexity as well. Most of the work using coherent reception has been reported for single wavelength 40 Gbps and 100 Gbps deployments [ 39,40]. Single channel setups are easier to simulate but coherent QPSK-UDWDM systems are still unexplored to a great extent.…”

Section: Trans-receiver Architecturementioning

confidence: 99%

Link Optimization and Performance Analysis of a 40 Gbps DQPSK Modulated Ultra DWDM System with 32 Orthogonally Polarized channels

Sharan

Agrawal

Chaubey

2016

J. Microw. Optoelectron. Electromagn. Appl.

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Abstract-The demand for higher speed at a lesser transmission cost per bit resulted in growth of optical networks with improved spectral efficiency even at narrower channel spacing. Incorporation of multilevel modulation formats in DWDM system led to the exploration of the 25 GHz channel grid, popularly known as Ultra Dense Wavelength Division Multiplexed (UDWDM) systems, opening new research frontiers. At such channel spacing's, nonlinear optical effects impose severe system impairments and hence robust modulation schemes are currently being investigated. This paper presents a simulative model to implement and analyze alternative polarized DQPSK modulated UDWDM system to evaluate its resilience to XPM and fiber nonlinearity. An UDWDM system supporting 32 channels, each operating at 40 Gbps and spaced at 25 GHz is studied numerically for long-haul optical communication system using OptiSystem simulator to estimate OSNR penalties to mitigate XPM effects. The major detrimental factors encountered in link design have been estimated to evaluate the system performance in terms of Q value for different number of channels and with varied input power. The analysis reports acceptable performance for DQPSK format up to a link distance of 1500 Km and also claims a better tolerance to dispersion and nonlinearities at higher input power levels.Index Terms-UDWDM, DQPSK, modulation formats, dispersion compensation I. INTRODUCTION The exponential growth in global broadband data services and advanced internet traffic in telecommunication networks worldwide has triggered a sharp rise in the demand for an extremely high transmission capacity. Optical fiber communication systems form the backbone of high speed transport infrastructure enabled by its potentially unlimited capabilities [1,2] Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol. 15, No. 4, December 2016 without the need of bottleneck-prone opto-electronic/electro-optic conversions [4]. Moreover, the deployment of Dispersion Compensating Fibers (DCF) to curtail the deleterious effects of chromatic dispersion makes long distance transmission at high-data-rate a possibility [5]. Inspite of these attempts to tap the fiber potential to its fullest, some suitable engineering needs to performed to circumvent the phase distortions generated due to undesirable non-linear interactions, which accumulate as the multiplexed signals propagate over the fiber length [6 ,7].Current demand for high speed services, especially those contributing to the ever growing IP traffic, requires spectrally efficient DWDM systems [8,9]. Transmission at 40 Gbps is definitely more intriguing than at 10 Gbps spacing due to physical layer constraints, such as polarization mode dispersion (PMD), fiber non-linearities, accumulated amplified spontaneous emission (ASE) noise, chromatic dispersion (CD), and spectrum narrowing resulting due to filter cascading [10]. Such systems require higher signal-to-noise ratio, which necessitates increased power per channel and these cha...

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Coherent Ultra Dense WDM Technology for Next Generation Optical Metro and Access Networks

Cited by 95 publications

References 23 publications

UDWDM-PON Using Low-Cost Coherent Transceivers With Limited Tunability and Heuristic DWA

UDWDM-PON Using Low-Cost Coherent Transceivers With Limited Tunability and Heuristic DWA

Cost-Effective Transceiver Based on an RSOA and a VCSEL for Flexible uDWDM Networks

Link Optimization and Performance Analysis of a 40 Gbps DQPSK Modulated Ultra DWDM System with 32 Orthogonally Polarized channels

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