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A variable-gain optical amplifier for metro WDM networks with mixed span losses: a gain-clamped semiconductor optical amplifier combined with a Raman fiber amplifier

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Abstract:

We propose a variable-gain optical amplifier that exhibits excellent performance in metro wavelength-division-multiplexing networks containing mixed span losses. The ampl...Show More

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Abstract:

We propose a variable-gain optical amplifier that exhibits excellent performance in metro wavelength-division-multiplexing networks containing mixed span losses. The amplifier consists of a variable-gain Raman fiber amplifier and a gain-clamped semiconductor optical amplifier. Each span of different loss is exactly compensated by adjusting the pump power of a Raman laser diode to have the maximum optical signal-to-noise ratio. Sixteen channels of 10-Gb/s signals were successfully transmitted over 170 km of mixed span losses (total, 87 dB) under dynamic additions/removals situations.

Published in: IEEE Photonics Technology Letters ( Volume: 17, Issue: 6, June 2005)

Page(s): 1301 - 1303

Date of Publication: 23 May 2005

ISSN Information:

DOI: 10.1109/LPT.2005.846916

References is not available for this document.

Contents

I. Introduction

Span lengths typically differ and the span losses may change due to upgrading and reconfiguration of systems in metro wavelength-division-multiplexing (WDM) networks. The resulting unequal span losses, as well as the transient changes in gain due to channel add–drops, can make system design difficult if appropriate optical amplifiers are not used [1], [2].

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A variable-gain optical amplifier for metro WDM networks with mixed span losses: a gain-clamped semiconductor optical amplifier combined with a Raman fiber amplifier

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A variable-gain optical amplifier for metro WDM networks with mixed span losses: a gain-clamped semiconductor optical amplifier combined with a Raman fiber amplifier

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