Improved reduced models for single-pass and reflective semiconductor optical amplifiers

Abstract

Abstract-We present highly accurate and easy to implement, improved lumped semiconductor optical amplifier (SOA) models for both single-pass and reflective semiconductor optical amplifiers (RSOA). The key feature of the model is the inclusion of the internal losses and we show that a few subdivisions are required to achieve an accuracy of 0.12 dB. For the case of RSOAs, we generalize a recently published model to account for the internal losses that are vital to replicate observed RSOA behavior. The results of the improved reduced RSOA model show large overlap when compared to a full bidirectional travelling wave model over a 40 dB dynamic range of input powers and a 20 dB dynamic range of reflectivity values. The models would be useful for the rapid system simulation of signals in communication systems, i.e. passive optical networks that employ RSOAs, signal processing using SOAs and for implementing digital back propagation to undo amplifier induced signal distortions.

Optical Phase Conjugation Using Nonlinear SOA for Nonlinearity and Dispersion Compensation of Coherent Multi-Carrier Lightwave Systems

“…We numerically solve the nonlinear Schrodinger equation with the standard split-step Fourier method for the propagation of the optical signal through the fiber. We solve the coupled equations for the time-dependent gain and phase for the optical signal propagation in SOA [30]. The parameters are chosen corresponding to the experimental results shown in Section 3.…”

Estimation of the Performance Improvement of Pre-Amplified PAM4 Systems When Using Multi-Section Semiconductor Optical Amplifiers

“…To address the issue of including non-negligible internal scattering losses we developed an improved lumped SOA model [14] that is accurate to~1 dB and we have used this model to estimate the wavelength conversion performance of optical signals in SOAs [19]. The SOA dynamics are described by a single differential equation for each subsection [14]:…”

“…We are modifying our simplified SOA model in [14] to consider multi-section SOAs. We find that in order to replicate the experimental results for amplification of PAM4 signals using SOAs in [15], we need only consider amplified spontaneous emission (ASE) noise generated in the SOA and thermal noise in an optical receiver, and we achieve similar bit-error rate (BER) performance to experimental 28 Gbaud PAM4 systems [15].…”

Sub-harmonic injection locking of quantum-dash lasers using spectral enrichment from semiconductor optical amplifiers

“…The effect of the length of the random bit sequence is analyzed through numerical simulations. The propagation model of SOAs [27,28] is used to study the spectral enrichment process of OOK and BPSK signals of the lengths of the random bit signal varying from 27 − 1 to 231 − 1. The carrier-to-sideband power ratio (CSR) for the 10 GHz sidebands of the signals before and after propagation through the SOA is measured, and its variation with respect to the PRBS order is observed.…”