Open AccessOrbital-angular-momentum crosstalk and temporal fading in a terrestrial laser link using single-mode fiber coupling
Author(s) -
Gustavo Funes,
Matías A. Vial,
Jaime A. Anguita
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.023133
Subject(s) - optics , physics , crosstalk , fading , angular momentum , free space optical communication , single mode optical fiber , waveform , laser , telecommunications , channel (broadcasting) , computer science , quantum mechanics , voltage
Using a mobile experimental testbed, we perform a series of measurements on the detection of laser beams carrying orbital angular momentum (OAM) to evaluate turbulent channel distortions and crosstalk among receive states in an 84-m roofed optical link. We find that a receiver assembly using single-mode fiber coupling serves as a good signal selector in terms of crosstalk rejection. From the recorded temporal channel waveforms, we estimate average crosstalk profiles and propose an appropriate probability density function for the fluctuations of the detected OAM signal. Further measurements of OAM crosstalk are described for a horizontal 400-m link established over our campus.