Few-Mode Fiber Coupling Efficiency for Free-Space Optical Communication

Fiber coupling with adaptive optics for free-space optical communication

We describe an adaptive optical fiber coupling system for free-space optical communication comprising a microelectromechanical deformable mirror and a VLSI gradient descent controller for model-free performance optimization. A comparison of Strehl ratio maximization with direct model-free coupling efficiency optimization revealed an advantage of the latter method.

Coupling Efficiency of Laser Beam to Multimode Fiber for Free Space Optical Communication

Suguru Arisa, Yoshihisa Takayama, Hiroyuki Endo, Ryosuke Shimizu, Mikio Fujiwara, Masahide Sasaki Graduate school of Information Systems, University of Electro-Communications(UEC), Tokyo182-8585, Japan Space Communication Systems Laboratory, Wireless Network Research National Institute of Information and Communications Technology (NICT), 4-2-1 Nukui-Kitamachi, Koganei, Tokyo 184-8795, Japan Qua...

Incremental adaptive networks implemented by free space optical (FSO) communication

The aim of this paper is to fully analyze the effects of free space optical (FSO) communication links on the estimation performance of the adaptive incremental networks. The FSO links in this paper are described with two turbulence models namely the Log-normal and Gamma-Gamma distributions. In order to investigate the impact of these models we produced the link coefficients using these distribu...

Free Space Optical Communication for Tactical Operations

Resonant Pumping of Er-Doped Fiber Amplifiers for Improved Laser Efficiency in Free-Space Optical Communications

The research described in this publication was carried out by the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. © 2012. All rights reserved. abstract. — An efficient laser transmitter design is proposed using resonant pumping of an erbium-doped fiber amplifier for a free-space optical communications source...