Title :
Correlation measurements of intensity noise from the two facets of DFB lasers during linewidth rebroadening
Author :
Goobar, E. ; Rigole, P.-J. ; Schatz, R.
Author_Institution :
R. Inst. of Technol., Stockholm, Sweden
fDate :
7/30/1992 12:00:00 AM
Abstract :
A method to experimentally verify the importance of nonsymmetrical fluctuations of the longitudinal intensity distribution is proposed and tested on several DFB lasers. This is based on the measurement of correlation between the intensity noise from the two laser facets. The results indicate that such fluctuations, probably due to weak sidemode suppression, can play an important role in linewidth rebroadening. Linewidth floors were observed at high output powers without any noticeable correlation.
Keywords :
distributed feedback lasers; electron device noise; laser variables measurement; noise measurement; semiconductor junction lasers; spectral line breadth; DFB lasers; correlation measurements; high output powers; intensity noise; linewidth floors; linewidth rebroadening; longitudinal intensity distribution; nonsymmetrical fluctuations; sidemode suppression; two laser facets;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19920979
