Analysis of External Optical Feedback Effects in the non-Linear Semiconductor Laser Response Considering Second Order Intermodulation Products

• Type: Article in International Conference Proceedings Book
• Date: 2000

Authors

M. Madureira (Author) Other; Henrique Salgado (Author) FEUP

Conference proceedings International

Title: London Communications Symposium-LCS2000

Pages: 1-4

London Communications Symposium-LCS2000

University College London, London, U.K.

Other information

Abstract (EN): In SCM (sub-carrier multiplexing) communication systems, backreflections caused by splices, connectors or the Fresnel effect at the end of the fibre, may contribute to signal degradation and increase intermodulation distortion. In analogue optical links this means a loss in SNR and linearity. In this paper, an adequate semiconductor laser non-linear model for the assessment of the effect of optical reflections on the second order intermodulation distortion is developed. A mathematical treatment along with simulation results is presented. It is shown that there is a periodicity in intermodulation distortion ripple with external cavity length and that for values of the latter in excess of a few meters this ripple becomes negligible. This work was done as part of a cooperation with CERN for the CMS-Tracker project.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4