Technical Papers

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More services, less fiber

Ahmad Atieh, Pablo Perez, Robin Andrew, and Fahim Sheikh
Asia-Pacific Optical Communications, November 2005

Discusses the commercial and network architecture impact of a “black link” approach, as a key enabler for multi-vendor service solutions that combine both legacy systems and new video services with a maximum of future proof


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Wavelength Translations for Optical Network Upgrades

Ahmad Atieh and Paul Vella
Photonics North, October 2005

SFP transceivers have been used to show that legacy optical networks in the metro-core-edge region of the network can be upgraded cost effectively through optical-electrical-optical (OEO) wavelength translation. The wavelength translation (WT) technique i


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Low Cost DCM for Legacy SONET/SDH Networks

Lijie Qiao, Xiaofeng Zhu and Paul J. Vella
Photonics North, September 2005

The demand for increased data and communications services is driving many carriers to upgrade their legacy optical systems in the metro-metro-edge region of the communication network. When such upgrades require extending the tra


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Compact EDFA for CWDM Multi-channel Applications

Lijie Qiao and Paul J. Vella
Optical Society of America, April 2005

A novel EDFA has been designed to optimize amplification of CWDM channels in the C-and L-bands of the spectrum for multi-channel operation in a CWDM environment. Low-cost, wide-bandwidth, flat-gain and low-noise-figure per


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Black link approach for sharing optical fiber infrastructure and enabling multi services

Ahmad Atieh, Pablo Perez, Robin Andrew and Fahim Sheikh
OFC/NFOEC, March 2005

Describes an innovative and cost effective optical infrastructure solution to support multi-vendor service solutions that combine both legacy systems and new video services with a maximum of flexibility at the lowest


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Degradation of amplified multi-channel CWDM systems from semiconductor optical amplifier impairments

Ahmad Atieh and Paul Vella
Canadian Institute for Photonic Innovations, October 2004

The dominant limiting factors affecting the performance of an amplified CWDM data transmission system with an inline semiconductor optical amplifier are investigated at different data rates and data formats. In this paper, the effects of ASE beat noise and XGM on data transmission in an amplified CWDM system is investigated. Also, the effects of SOA impairments on different data rates and data formats such as OC-48, OC-12, Fiber channel and gigabit Ethernet will be reported on and discussed.


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ASE and Cross-Gain Modulation Limitations in a Four-Channel CWDM Transmission System using a SOA

Ahmad Atieh and Paul Vella
Photonics North, August 2004

In this work, the effects of ASE beat noise and cross-gain-modulation (XGM) on data transmission in a 10-Gbps CWDM system with an inline semiconductor optical amplifier (SOA) are investigated. The dominant impairment factors and


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CWDM Optical Amplifiers Technologies

Ahmad Atieh, Lijie Qiao, Suet Yuen, and Paul Vella
Fiber Optic Technology, July 2004

Coarse wavelength division multiplexing (CWDM) transmission systems offer cost-effective means of delivering broadband optical services within applications such as metropolitan and enterprise networks. The cost savings originate


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Reach Extension of CWDM Transmission Systems Using SOAs

Ahmad Atieh, Paul Vella (BTI Photonic Systems Inc.) and Craig Michie, Tony Kelly, Bob Press (Kamelian Ltd.)
Lightwave, February 2004

Key physical characteristics of semiconductor optical amplifiers such as gain, NF, Psat, PDG and gain ripple are presented. The importance of each of these parameters within the context of telecommunication systems is explained.


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