Separation of coherent and incoherent nonlinearities in a heterodyne pump-probe experiment

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. (doi: 10.1364/OE.7.000107)

Abstract

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.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Kelly, Professor 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
• ISSN: 1094-4087
• ISSN (Online): 1094-4087