Title :
Free space optical wireless communications using directly modulated two-electrode high brightness tapered laser diode
Author :
Feng Feng ; Page, H. ; Penty, Richard V. ; White, Ian H. ; Wilkinson, Timothy D. ; Michel, N. ; Calligaro, M. ; Robert, Yannick ; Parillaud, O. ; Krakowski, M.
Author_Institution :
Electr. Div., Dept. of Eng., Univ. of Cambridge, Cambridge, UK
Abstract :
A two-electrode tapered laser uses a separate excitation to achieve high output modulation depth with a small input current swing that can be provided with existing standard optical communication components, making it a novel source for optical wireless communications. Presented is a 1.25 Gbit/s free-space optical wireless communication system over a distance of 60 m, with a high power and high modulation efficiency two-electrode tapered laser. The system exhibits a 6.5 dB power penalty.
Keywords :
modulation; optical communication; semiconductor lasers; directly modulated two-electrode high brightness tapered laser diode; free space optical wireless communications; output modulation depth; power penalty; standard optical communication components; two-electrode tapered laser;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2012.0093
