Title :
Static and dynamic analysis of tunable two-section high-speed distributed feedback laser utilizing the gain lever effect
Author :
Griffel, Giora ; Chen, Chih-Hsiao
Author_Institution :
Polytechnic Univ., Brooklyn, NY, USA
fDate :
1/1/1996 12:00:00 AM
Abstract :
Analysis of a novel semiconductor laser structure designed for obtaining wide tuning range along with high speed modulation response is presented. The laser consists of a composite cavity structure with two active (gain) sections. One of the sections has a grating corrugation while the other is flat. A detailed round-trip analysis is combined with the rate equations, which include sublinear gain/carrier relation, to perform steady-state and small-signal analysis. It is shown that the biasing (dc) condition of the different sections plays a critical role in the determination of the dynamic response of the device. In addition, we show that the gain-lever effect can be utilized for a considerable enhancement of the frequency modulation (FM) response. Other critical structural parameters such as the grating coupling coefficient and device geometry are discussed
Keywords :
diffraction gratings; distributed feedback lasers; electro-optical modulation; frequency modulation; laser theory; laser tuning; optical couplers; optical design techniques; semiconductor lasers; DFB lasers; active gain sections; biasing dc condition; composite cavity structure; device geometry; dynamic analysis; frequency modulation; gain lever effect; grating corrugation; grating coupling coefficient; high speed modulation response; rate equations; round-trip analysis; semiconductor laser structure design; static analysis; sublinear gain/carrier relation; tunable two-section high-speed distributed feedback laser; wide tuning range; Equations; Frequency modulation; Gratings; Laser tuning; Optical design; Performance analysis; Performance gain; Semiconductor lasers; Steady-state; Tunable circuits and devices;
Journal_Title :
Quantum Electronics, IEEE Journal of
