Title :
Analytical formulation of distortion and chirp in CATV DFB lasers including spatial hole burning
Author :
Vinzio, Raffaella ; Toffano, Zeno ; Destrez, Alain
Author_Institution :
Service Radio, Ecole Superieure d´´Electr., Gif-sur-Yvette, France
fDate :
2/1/1998 12:00:00 AM
Abstract :
Analytical formulas for distortions permitting the calculation of composite second order (CSO) and composite triple beat (CTB) in distributed feedback (DFB) laser diodes are given, including gain compression and longitudinal spatial hole burning (LSHB). An improved chirp expression including both effects is also proposed. Gain compression is compared to LSHB over the CATV band: LSHB effects on distortion and chirp are found to be dominant in actual CATV lasers. Nonmonotonous behavior (dips) function of frequency and bias current is verified in second- and third-order distortions in agreement with recent results
Keywords :
cable television; chirp modulation; distributed feedback lasers; intermodulation distortion; laser beams; laser theory; optical fibre networks; optical hole burning; optical transmitters; semiconductor lasers; CATV DFB lasers; CATV band; analytical formulation; bias current; chirp; composite second order; composite triple beat; distortion; distributed feedback laser diodes; gain compression; nonmonotonous behavior; second-order distortions; spatial hole burning; third-order distortions; Chirp modulation; Distributed feedback devices; Equations; Fiber lasers; Frequency; Intermodulation distortion; Laser feedback; Laser modes; Laser noise; Semiconductor lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
