Abstract
We propose and develop a general tensor analysis framework for a subcarrier
multiplex analog optical fiber link for applications in microwave photonics.
The goal of this work is to construct an uniform method to address nonlinear
distortions of a discrete frequency transmission system. We employ tensorial
representation, i.e., multidimensional arrays, to unify the multi-subcarrier
intermodulation effect. Based on the tensorial expression of the optical field
in a subcarrier vector space, various kinds of modulation methods, dispersive
transmission as well as detection schemes are specified. In addition, it is
demonstrated that each corresponding tensor is formally determined by device
structures, which allows for a synthesized study of device combinations more
systematically. For implementing numerical methods, the practical significance
of the tensor model is it simplifies the derivation details compared with
series-based approaches by hiding the underlying multi-fold summation and
index operation. The integrity of the proposed methodology is validated by
investigating the classical intensity modulated system. Furthermore, to give
an application model of the tensor formalism, we make a study of two multi-subcarrier
systems with detailed performance discussions. We believe the tensor model
provides us not only a consolidated notation, but also an alternative numerical
approach to effectively analyze multi-subcarrier analog optical systems.
© 2011 IEEE
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