Title :
Modulation bandwidth optimisation for unipolar intersubband semiconductor lasers
Author :
Cheun, C. Y L ; Spencer, P.S. ; Shore, K.A.
Author_Institution :
School of Electron. Eng. & Comput. Syst., Univ. of Wales, Bangor, UK
fDate :
2/1/1997 12:00:00 AM
Abstract :
A rate equation analysis of the direct current modulation response of intersubband semiconductor lasers is reported using a rate equation model for a triple quantum well structure. It is demonstrated that terahertz modulation bandwidths may be achievable due to the picosecond carrier lifetimes which are characteristic of such structures. A novel feature of the modulation response of intersubband semiconductor lasers is the existence of an optimum output power for achieving maximum modulation bandwidth in a given structure. Further optimisation of the modulation performance is achievable via appropriate design of the coupled quantum well structure
Keywords :
carrier lifetime; high-speed optical techniques; laser theory; optical design techniques; optimisation; quantum well lasers; semiconductor device models; coupled quantum well structure design; direct current modulation response; modulation bandwidth optimisation; optimum output power; picosecond carrier lifetimes; rate equation analysis; rate equation model; terahertz modulation bandwidths; triple quantum well structure; unipolar intersubband semiconductor lasers;
Journal_Title :
Optoelectronics, IEE Proceedings -
DOI :
10.1049/ip-opt:19971068
