Title :
Identifying sources of residual reflections within integrated electroabsorption modulated laser cavities
Author :
Ackerman, D.A. ; Shtengel, G.E. ; Morton, P.A. ; Zhang, L.M. ; Johnson, J.E. ; Bethea, C.G. ; Ketelsen, L.J.P.
Author_Institution :
Lucent Technol., AT&T Bell Labs., Murray Hill, NJ, USA
Abstract :
Integrated electroabsorption modulated lasers (EMLs) are designed for use in high bit-rate 1550-nm fiber-optic communication systems in which the dispersion penalty incurred using directly modulated distributed feedback (DFB) lasers is judged unacceptably high. A critical system parameter is the total frequency chirp exhibited by the EML source under digital modulation, typically at 2.5 or 10 GBit/s. Frequency chirp in an EML arises from the electro-optic effect in the modulator, electrical cross talk between modulator and laser sections and from reflected optical power, which re-enters and perturbs the DFB laser section after undergoing modulation
Keywords :
chirp modulation; distributed feedback lasers; electro-optical modulation; electroabsorption; integrated optics; laser cavity resonators; light reflection; optical communication equipment; reflectivity; semiconductor lasers; 10 Gbit/s; 1550 nm; 2.5 Gbit/s; DFB laser section; EML source; critical system parameter; directly modulated DFB lasers; dispersion penalty; electrical cross talk; electro-optic effect; frequency chirp; high bit-rate 1550-nm fiber-optic communication systems; integrated electroabsorption modulated laser cavities; integrated electroabsorption modulated semiconductor lasers; laser sections; light source reflections; reflected optical power; residual reflections; total frequency chirp; Chirp modulation; Distributed feedback devices; Electrooptic modulators; Fiber lasers; Frequency; Laser feedback; Lasers and electrooptics; Optical design; Optical reflection; Power lasers;
Conference_Titel :
Optical Fiber Communication. OFC 97., Conference on
Conference_Location :
Dallas, TX
Print_ISBN :
1-55752-480-7
DOI :
10.1109/OFC.1997.719764
