Title :
On the locking range of hybridly mode-locked semiconductor lasers
Author :
Schell, M. ; Bimberg, D. ; Kamiya, T.
Author_Institution :
Inst. fur Festkorperphys., Tech. Univ. Berlin, Germany
Abstract :
We theoretically investigate the locking range of hybridly mode-locked semiconductor lasers with a DBR section as a reflector. The DBR coupling constant and length are crucial in determining the locking range. At constant pulse width, the tuning range of the repetition frequency can be increased by a factor of 3 by using a strongly coupled, long DBR rather than a short and weakly coupled DBR. For a 30 GHz cavity and a pulse width of 5 ps, a locking range of 2.5% is predicted after optimization. We explain the increase in the locking range as a consequence of the dispersion inherent to a DBR. In addition, the pulses are found to be asymmetric, depending on the DBR parameters.
Keywords :
distributed Bragg reflector lasers; high-speed optical techniques; laser cavity resonators; laser mode locking; laser tuning; semiconductor lasers; 30 GHz; 5 ps; DBR coupling constant; asymmetric pulses; cavity; dispersion; hybridly mode-locked semiconductor lasers; locking range; optimization; pulse width; reflector; repetition frequency; tuning range; Distributed Bragg reflectors; Frequency; Laser mode locking; Laser theory; Laser transitions; Laser tuning; Optical pulses; Optical reflection; Semiconductor lasers; Space vector pulse width modulation;
Journal_Title :
Photonics Technology Letters, IEEE
