Title :
Analysis of distributed feedback lasers using optical low-coherence reflectometry
Author :
Wiedmann, Uwe ; Gallion, Phillipe ; Jaouën, Yves ; Chabran, Claude
Author_Institution :
Dept. Commun., CNRS, Paris, France
fDate :
5/1/1998 12:00:00 AM
Abstract :
The analysis of distributed feedback (DFB) lasers by optical low-coherence reflectometry (OLCR) shows the appearance of additional more or less periodic minima in the reflectogram. These do not reflect local minima of the reflectance, but are rather due to multipath interference effects caused by spectral filtering of the white light source by the laser under test. It is shown that the coupling coefficient of the laser can be determined from the period of these minima
Keywords :
diffraction gratings; distributed feedback lasers; light interferometry; measurement theory; optical testing; reflectivity; DFB lasers; coupling coefficient; distributed feedback lasers; laser testing; laser under test; multipath interference effects; optical low-coherence reflectometry; periodic minima; reflectogram; spectral filtering; white light source; Distributed feedback devices; Filtering; Interference; Laser feedback; Light sources; Optical feedback; Optical filters; Reflectivity; Reflectometry; Testing;
Journal_Title :
Lightwave Technology, Journal of
