Title :
Theory for optimum design and analysis of distributed-feedback lasers
Author :
Wang, Jing-Yi ; Cada, Michael ; Sun, Jin
Author_Institution :
Dept. of Electr. & Comput. Eng., Dalhousie Univ., Halifax, NS, Canada
Abstract :
Theory for optimum design of a distributed-feedback (DFB) laser is presented, based on a new set of coupled-power equations. A novel /spl lambda//4 phase shift index-coupled AR-coated DFB laser structure, which theoretically exhibits a longitudinally uniform power density, is proposed. It is shown that the theory is very simple and provides an easy way to analytically understand the physical mechanism crucial for the optimum design. Our theory can also be easily applied to the optimization of the design of gain-coupled, complex-coupled DFB laser structures as well as high power DFB lasers.
Keywords :
antireflection coatings; distributed feedback lasers; laser theory; optical design techniques; optical films; optimisation; semiconductor device models; semiconductor lasers; /spl lambda//4 phase shift; DFB laser design; coupled-power equations; distributed-feedback lasers; gain-coupled complex-coupled DFB laser structures; high power DFB lasers; index-coupled AR-coated DFB laser structure; longitudinally uniform power density; optimization; optimum design; physical mechanism; Charge carrier density; Difference equations; Laser modes; Laser theory; Nonlinear equations; Optical coupling; Optical design; Power lasers; Semiconductor lasers; Sun;
Journal_Title :
Photonics Technology Letters, IEEE
