Title :
New WDM DFB laser structure for facet phase-free uniform performances
Author :
Thedrez, B. ; Voiriot, V. ; Hubert, S. ; Lafragette, J.L. ; Roux, L. ; Grillot, F. ; Gentner, J.L. ; Fernier, B.
Author_Institution :
Groupement d´Interet Econ., Alcatel Corp. Res. Center, Marcoussis, France
Abstract :
A new concept for a DFB MQW monomode laser has been proposed and demonstrated. The new structure combines high SMSR, excellent uniformity, high efficiency and low divergence. Uniform spectral performances have been demonstrated with a SMSR of 44 dB at 3 mW, showing that standard processing techniques can be used to fabricate monomode devices with uniformity performances and a theoretical yield of 100% similar to that of Fabry-Perot lasers. Threshold as low as 14 mA, an efficiency of 0.32 W/A and a divergence of 14°×16° could also be obtained with the proposed principle. These results are very promising and open the way for the fabrication of selection-free monomode lasers for WDM applications with highly competitive performances.
Keywords :
antireflection coatings; distributed feedback lasers; infrared sources; laser modes; laser transitions; optical films; quantum well lasers; wavelength division multiplexing; 1.55 mum; 14 mA; 3 mW; DFB MQW monomode laser; Fabry-Perot lasers; WDM DFB laser structure; WDM applications; facet phase-free uniform performances; high SMSR; high efficiency; highly competitive performances; low divergence; monomode device fabrication; processing techniques; selection-free monomode lasers; uniform spectral performances; Charge carrier density; Distributed feedback devices; Gratings; Laser feedback; Laser modes; Optical device fabrication; Power lasers; Quantum well devices; Quantum well lasers; Wavelength division multiplexing;
Conference_Titel :
Semiconductor Laser Conference, 2000. Conference Digest. 2000 IEEE 17th International
Conference_Location :
Monterey, CA, USA
Print_ISBN :
0-7803-6259-4
DOI :
10.1109/ISLC.2000.882284
