Abstract
A novel state-variable model for semiconductor optical amplifiers
(SOAs) that is amenable to block diagram implementation of wavelength
division multiplexed (WDM) signals and fast execution times is presented.
The novel model is called the reservoir model, in analogy with similar
block-oriented models for Raman and erbium-doped fiber amplifiers
(EDFAs). A procedure is proposed to extract the needed reservoir
model parameters from the parameters of a detailed and accurate space-resolved
SOA model due to Connelly, which was extended to cope with the time-resolved
gain transient analysis. Several variations of the reservoir model
are considered with increasing complexity, which allow the accurate
inclusion of scattering losses and gain saturation induced by amplified
spontaneous emission. It is shown that at comparable accuracy, the
reservoir model can be 20 times faster than the Connelly model in
single-channel operation; much more significant time savings are
expected for WDM operation. The model neglects intraband SOA phenomena
and is thus limited to modulation rates per channel not exceeding
10 Gb/s. The SOA reservoir model provides a unique tool with reasonably
short computation times for a reliable analysis of gain transients
in WDM optical networks with complex topologies
- amplified
- amplifier,
- amplifiers,
- analysis,
- communication
- communication,
- division
- emission,
- equipment,
- fibre
- gain
- model,
- multiplexing
- multiplexingsoa,
- optical
- reservoir
- semiconductor
- spontaneous
- superradiance,
- time-resolved
- transient
- wavelength
- wdm,
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