Title :
Direct observation of shot noise in linewidth broadening of DBR lasers
Author :
Sundaresan, H. ; Fletcher, N.C.
Author_Institution :
British Telecom Res. Lab., Ipswich, UK
Abstract :
The relative intensity noise in DBR lasers has been measured as a function of the tuning current. Excellent correlation was found with the expected linewidth broadening, thus identifying shot noise in the passive regions to be the dominant mechanism. The noise spectrum peaks at around 300 MHz.
Keywords :
distributed Bragg reflector lasers; electron device noise; laser tuning; random noise; semiconductor junction lasers; spectral line breadth; 1.55 micron; 3 to 1000 MHz; DBR lasers; dominant mechanism; linewidth broadening; noise spectrum peaks; optical communication systems; passive regions; relative intensity noise; shot noise; tunable laser diodes; tuning current;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19901295
