Cross-gain modulation in inhomogeneously broadened gain spectra of InP-Based 1550 nm quantum dash optical amplifiers: Small-signal bandwidth dependence on wavelength detuning

Dynamical properties of cross-gain modulation (XGM) within the inhomogeneously broadened gain spectrum of an InP quantum dash optical amplifier operating at 1550 nm are examined. The small-signal XGM modulation bandwidth increases with the carrier escape time, which is achieved at long probe wavelengths. The nature of the XGM dynamics is confirmed by spectrally resolved optical modulation response measurements in quantum dash lasers.

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