Title :
Transient chirping in distributed-feedback (DFB) lasers: effect of spatial hole-burning along the laser axis
Author :
Kinoshita, Jun-Ichi ; Matsumoto, Kenji
Author_Institution :
Toshiba Corp., Yokohama, Japan
fDate :
11/1/1988 12:00:00 AM
Abstract :
An analysis of the chirping behavior of directly modulated distributed-feedback (DFB) lasers which takes into consideration the effects of spatial hole-burning along the laser axis is discussed. Rate equations including these effects are derived. To calculate the rate equations, the threshold condition of phase-shifted DFB lasers with a nonuniform refractive index distribution is analyzed. The calculations are carried out on phase-shifted DFB structures under the condition of random nonreturn to zero modulation at 1.8 Gb/s. The results show that the spatial hole-burning along the axis significantly affects the chirping behavior, adding to the effects induced by the spectral hole-burning alone
Keywords :
distributed feedback lasers; optical hole burning; optical modulation; semiconductor junction lasers; 1.8 Gbit/s; diode laser rate equations; directly modulated lasers; distributed-feedback (DFB) lasers; laser axis; nonuniform refractive index distribution; phase-shifted DFB lasers; random nonreturn to zero modulation; spatial hole-burning; threshold condition; transient chirping; Charge carrier density; Chirp modulation; Equations; Fiber lasers; Laser feedback; Laser modes; Laser theory; Optical coupling; Optical refraction; Refractive index;
Journal_Title :
Quantum Electronics, IEEE Journal of
