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A Distributed Optimization Approach to Constrained OSNR Problem

Summary: A Distributed Optimization Approach to
Constrained OSNR Problem
Yan Pan
Tansu Alpcan
Lacra Pavel

Department of Electrical and Computer Engineering, University of
Toronto, Toronto, ON M5S 3G4, Canada
(e-mail: {yanpan,pavel}@control.utoronto.ca)

Deutsche Telekom Laboratories, Technische Universitat Berlin
Emst-Reuter-Platz 7, 10587, Germany
(e-mail: tansu.alpcan@telekom.de)
Abstract: This paper studies constrained optical signal-to-noise ratio (OSNR) problem via a
distributed optimization approach. In multi-channel optical systems, the signal over an optical
link can be regarded as an interfering noise for others, which leads to OSNR degradation.
Regulating the input optical power at the Source (transmitter) aims to achieve satisfactory
OSNR level at the Destination (receiver) for each channel. Moreover, because all wavelength-
multiplexed channels in a link share the same optical fiber, the total input power in a link
has to be below the nonlinearity threshold, which corresponds to a link capacity constraint. We


Source: Alpcan, Tansu - Deutsche Telekom Laboratories & Technische Universitšt Berlin


Collections: Engineering