Title :
Free Space Communications With Beam Steering a Two-Electrode Tapered Laser Diode Using Liquid-Crystal SLM
Author :
Feng Feng ; White, Ian H. ; Wilkinson, Timothy D.
Author_Institution :
Eng. Dept., Univ. of Cambridge, Cambridge, UK
Abstract :
A free space optical wireless communication system with 3 degree angular coverage and 1.25 GHz modulation bandwidth is reported, in which relatively narrow laser beam of a simultaneous high power, high modulation speed and ultra high modulation efficiency directly modulated two-electrode tapered laser diode is steered using a nematic phase-only Liquid-Crystal On Silicon Spatial Light Modulator (LCOS SLM) by displaying reconfigurable 256 phase level gratings.
Keywords :
beam steering; diffraction gratings; liquid crystal on silicon; optical communication equipment; optical links; semiconductor lasers; spatial light modulators; LCOS SLM; bandwidth 1.25 GHz; beam steering; directly modulated two electrode tapered laser diode; free space communications; high modulation speed; liquid crystal spatial light modulator; modulation bandwidth; narrow laser beam; nematic phase only liquid crystal on silicon; phase level grating; ultrahigh modulation efficiency; Beam steering; Diffraction; Laser beams; Liquid crystal on silicon; Optical modulation; Semiconductor lasers; Beam steering; free-space optical communication; semiconductor lasers; spatial light modulators (SLMs);
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2013.2262372
