TY - GEN
T1 - Experimental analysis of orbital angular momentum-carrying beams in turbulence
AU - Anguita, Jaime A.
AU - Herreros, Joaquín
PY - 2011
Y1 - 2011
N2 - In a laboratory experiment we generate, propagate, and detect laser vortex beams carrying orbital angular momentum (OAM) by means of spatial light modulators (SLMs). We show that beams with OAM states from - 20 to +20 can be effectively generated using different types of phase gratings, and that excellent contrast between adjacent OAM modes is achieved. A weak turbulent air flow is induced on the propagation path to emulate the effects of atmospheric turbulence. By characterizing the effects of optical turbulence on the modal crosstalk among received OAM states we show that it is possible to distinguish them for the purpose of increasing the data throughput of a laser communication link in weak turbulence. It is also demonstrated that by increasing the complexity of the receiver, optical separation of the OAM modes is possible at stronger turbulence conditions.
AB - In a laboratory experiment we generate, propagate, and detect laser vortex beams carrying orbital angular momentum (OAM) by means of spatial light modulators (SLMs). We show that beams with OAM states from - 20 to +20 can be effectively generated using different types of phase gratings, and that excellent contrast between adjacent OAM modes is achieved. A weak turbulent air flow is induced on the propagation path to emulate the effects of atmospheric turbulence. By characterizing the effects of optical turbulence on the modal crosstalk among received OAM states we show that it is possible to distinguish them for the purpose of increasing the data throughput of a laser communication link in weak turbulence. It is also demonstrated that by increasing the complexity of the receiver, optical separation of the OAM modes is possible at stronger turbulence conditions.
KW - Channel interference
KW - Channel multiplexing
KW - Free-space laser communication
KW - Optical vortices
KW - Orbital angular momentum
UR - http://www.scopus.com/inward/record.url?scp=80053965375&partnerID=8YFLogxK
U2 - 10.1117/12.892955
DO - 10.1117/12.892955
M3 - Conference contribution
AN - SCOPUS:80053965375
SN - 9780819487728
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Free-Space and Atmospheric Laser Communications XI
T2 - Free-Space and Atmospheric Laser Communications XI
Y2 - 24 August 2011 through 25 August 2011
ER -