Ap. Deboer et al., AMPLIFIED SPONTANEOUS EMISSION-SPECTROSCOPY ON SEMICONDUCTOR OPTICAL AMPLIFIERS SUBJECT TO ACTIVE LIGHT INJECTION, Applied physics letters, 72(23), 1998, pp. 2936-2938
It is shown that measurements of the effect of optical injection with
an external laser on the spectral response of a semiconductor optical
amplifier can probe intrinsic properties of a working device. The data
demonstrate that under saturated gain conditions the carrier energy d
istribution within the active layer of a AlGaAs/GaAs amplifier neither
shows spectral hole burning nor carrier heating, but only a decreased
density. (C) 1998 American Institute of Physics.