Journal article
Separation of coherent and incoherent nonlinearities in a heterodyne pump-probe experiment
We demonstrate that the transient coherent nonlinearity (coherent artifact) affecting the pump-probe response of semiconductor optical amplifiers can be experimentally separated from the incoherent transient. The technique is based on measuring the mirror component of the coherent artifact which is a background-free four--wave mixing signal at a different frequency with respect to the transmitted probe in a heterodyne detection scheme.
Measurements on amplifiers of different length reveal strong deviations from the commonly expected symmetric shape of the coherent artifact in case of long waveguides.
Language: | English |
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Year: | 2000 |
Pages: | 107-112 |
ISSN: | 10944087 |
Types: | Journal article |
DOI: | 10.1364/oe.7.000107 |
ORCIDs: | Mørk, Jesper and Hvam, Jørn Märcher |