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Accounting for spectral hole burning (SHB), carrier heating (CH), carrier density modulation and longitudinal nonuniformity, ultrafast phase dynamics in bulk semiconductor optical amplifiers (SOAs) is numerically studied for different pump and probe wavelengths. We find that the contributions of SHB and CH to ultrafast phase dynamics are different in strength and change direction for different bands...
Based on density matrix equations, a broad-band time-domain large-signal model for semiconductor optical amplifiers (SOAs) is established. Accounting for spectral hole burning, carrier heating and carrier density modulation (CDM), we analysis the gain dynamics in a SOA stimulated by a 1ps pump pulse. On picosecond timescale, the ultrafast component of gain recovery dynamics is wavelength dependency...
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