Title :
Optical generation of microwave/millimeter-wave signals using two-section gain-coupled DFB lasers
Author :
Wang, Xinhong ; Mao, Weiming ; Al-Mumin, Mohammed ; Pappert, Stephen A. ; Hong, Jin ; Li, Guifang
Author_Institution :
CREOL, Central Florida Univ., Orlando, FL, USA
Abstract :
We report the first analysis and experimental demonstration of tunable microwave/millimeter-wave signal generation in two-section gain-coupled distributed-feedback (DFB) lasers. Continuous tuning from 20 to 64 GHz was directly observed and characterized both in the electrical and optical domain. The mechanism of microwave generation in two-section gain-coupled DFB lasers is different from that of two-section index-coupled DFB lasers previously reported. As a result, gain coupling can lead to simultaneous large modulation indexes and high frequencies in two-section DFB lasers.
Keywords :
distributed feedback lasers; electro-optical modulation; laser tuning; microwave generation; microwave photonics; millimetre wave generation; semiconductor lasers; 20 to 64 GHz; continuous tuning; high frequencies; large modulation indexes; microwave signal generation; millimeter-wave signal generation; optical generation; two-section gain-coupled DFB lasers; two-section gain-coupled distributed-feedback lasers; two-section index-coupled DFB lasers; Distributed power generation; Laser tuning; Masers; Microwave generation; Optical coupling; Optical modulation; Optical tuning; Signal analysis; Signal generators; Tunable circuits and devices;
Journal_Title :
Photonics Technology Letters, IEEE
