Title :
Effect of relatively strong light injection on the chirp-to-power ratio and the 3 dB bandwidth of directly modulated semiconductor lasers
Author :
Yabre, Gnitabouré
Author_Institution :
Lab. RESO, Ecole Nat. d´´Ingenieurs de Brest, France
fDate :
10/1/1996 12:00:00 AM
Abstract :
This paper describes a theoretical study of the small-signal modulation behavior of an injection-locked semiconductor laser. Illustrative examples are given, shelling a comparison between the free-running laser and the same laser with light injection. The results show that a substantial reduction of the chirp-to-power ratio (CPR) can be obtained, depending on both the injection level and the frequency detuning between the master and slave lasers. The behavior of the intensity modulation responses is also investigated, with the modulation conditions chosen in the dynamically stable locking range. It appears that the injection-locked laser may present a larger resonance frequency or modulation bandwidth with respect to those of the same laser under free-running operation
Keywords :
chirp modulation; electro-optical modulation; laser mode locking; laser stability; laser theory; laser tuning; semiconductor device models; semiconductor lasers; chirp-to-power ratio; dB bandwidth; directly modulated semiconductor lasers; dynamically stable locking range; free-running laser; free-running operation; frequency detuning; injection level; injection-locked semiconductor laser; intensity modulation responses; larger resonance frequency; light injection; master lasers; modulation bandwidth; modulation conditions; relatively strong light injection; slave lasers; small-signal modulation; substantial reduction; Chirp modulation; Fiber lasers; Frequency; Laser noise; Laser theory; Nonlinear optics; Optical filters; Optical receivers; Optical resonators; Semiconductor lasers;
Journal_Title :
Lightwave Technology, Journal of
