Borri, P., Romstad, F., Langbein, W., Kelly, A., Mork, J., and Hvam, J. (2000) Separation of coherent and incoherent nonlinearities in a heterodyne pump-probe experiment. Optics Express, 7 (3). pp. 107-112. ISSN 1094-4087 (doi:10.1364/OE.7.000107)
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Publisher's URL: http://dx.doi.org/10.1364/OE.7.000107
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.
|Glasgow Author(s) Enlighten ID:||Kelly, Dr Anthony|
|Authors:||Borri, P., Romstad, F., Langbein, W., Kelly, A., Mork, J., and Hvam, J.|
|Subjects:||T Technology > T Technology (General)|
Q Science > QC Physics
|College/School:||College of Science and Engineering > School of Engineering > James Watt Nanofabrication Centre|
|Journal Name:||Optics Express|
|Publisher:||Optical Society of America|