Abstract
We present a distributed amplified hybrid dense wavelength division
multiplexing (DWDM) and time division multiplexing (TDM) array architecture
for large scale interferometric fiber-optic sensor array systems. This architecture
employs a distributed Erbium doped fiber amplifier (EDFA) scheme to decrease
the distribution loss among multiplexed wavelengths, and employs TDM at each
wavelength to increase the total number of sensors that can be supported.
The first experimental demonstration of this system is reported including
results which show the potential for multiplexing and interrogating up to
4096 sensors using a single telemetry fiber pair with good system performance.
The number of interrogation sensors could be further increased by increasing
the number of wavelength channels. These architectures would be of great importance
in the application of systems requiring very large number of sensors with
limited telemetry cabling.
© 2012 IEEE
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