Title :
Self-pulsation in two-section DFB semiconductor lasers and its synchronization to an external signal
Author :
Pham, Guillaume ; Duan, Guang-Hua
Author_Institution :
Lab. d´´Optoelectron., Ecole Nat. Superieure des Telecommun., Paris, France
fDate :
6/1/1998 12:00:00 AM
Abstract :
A model of self-pulsation in two-section distributed feedback (DFB) lasers without a saturable absorber is developed by using generalized rate equations. The introduction of an effective differential gain in our model allows us to take into consideration both material and structural effects. The self-pulsation conditions are derived from a linear stability analysis. A mechanism based on a negative effective differential gain is proposed to explain the origin of self-pulsation in such lasers. By considering an injected optical signal, the optical synchronization of self-pulsating lasers is studied using nonlinear simulations. This leads to the determination of some locking-range properties, which are then compared to experimental and analytical results
Keywords :
distributed feedback lasers; laser stability; laser theory; semiconductor device models; semiconductor lasers; synchronisation; effective differential gain; external signal; generalized rate equations; injected optical signal; linear stability analysis; locking-range properties; negative effective differential gain; nonlinear simulations; optical synchronization; saturable absorber; self-pulsating lasers; self-pulsation; self-pulsation conditions; synchronization; two-section DFB semiconductor lasers; Distributed feedback devices; Equations; Laser feedback; Laser modes; Nonlinear optics; Optical feedback; Optical materials; Semiconductor lasers; Semiconductor materials; Stability analysis;
Journal_Title :
Quantum Electronics, IEEE Journal of
