Title :
Asymmetric QWS DFB laser diodes
Author_Institution :
Dept. of Electr. & Comput. Eng., Instituto Superior Technico, Lisbon, Portugal
Abstract :
Quarterly wavelength shifted (QWS) distributed feedback (DFB) laser structures are commonly referred to be associated with high mode selectivity, zero-frequency detuning and small threshold current density. The present paper compares different asymmetric QWS structures in the threshold regime, the results being summarized to show their influence on the emission laser characteristics.
Keywords :
distributed feedback lasers; semiconductor lasers; DFB; asymmetric quarterly wavelength shifted; distributed feedback; emission laser characteristics; high mode selectivity; laser diodes; laser structures; matricial techniques; single longitudinal mode operation; threshold current density; zero-frequency detuning; Bit rate; Current density; Diode lasers; Distributed feedback devices; Laser feedback; Laser modes; Laser theory; Nonuniform electric fields; Optical coupling; Reflectivity;
Conference_Titel :
AFRICON, 2004. 7th AFRICON Conference in Africa
Print_ISBN :
0-7803-8605-1
DOI :
10.1109/AFRICON.2004.1406848
