Title :
Correlation of relative intensity noise with linewidth floors in narrow linewidth DFB lasers
Abstract :
The relative intensity noise of narrow linewidth DFB lasers in the vicinity of linewidth floors is measured. A strong correlation between linewidth rebroadening and a corresponding increase in the relative intensity noise for frequencies below 3 GHz is observed for devices with mode suppression ratios in excess of 35 dB.
Keywords :
distributed feedback lasers; electron device noise; laser modes; laser tuning; semiconductor junction lasers; spectral line breadth; 100 MHz to 7 GHz; linewidth floors; linewidth rebroadening; mode suppression ratios; narrow linewidth DFB lasers; optical isolators; relative intensity noise; ridge waveguide structure; strong correlation; tunable sources;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19901294
