Cathodoluminescence study of defects in optical fiber preforms

摘要

The cathodoluminescence technique has been used to analyze germanosilicate optical fiber preforms fabricated by the MCVD process. The distributions E' and drawing-induced defects have been measured and the effects of some co-dopants and fabrication conditions on the distributions have been investigated. The results have been explained in terms of a simple reaction scheme involving the electron donor and acceptor properties of co- dopants.