Title :
Wavefront aberration correction in a free-space optical communication link using only the fiber-coupled optical power as a feedback mechanism
Author :
Sinefeld, David ; Ella, Roy ; Zaharan, Ofer ; Valiano, Yuval ; Mach, Eliezer ; Marom, Dan M.
Author_Institution :
Appl. Phys. Dept., Hebrew Univ., Jerusalem, Israel
Abstract :
We introduce an adaptive system which can compensate for coupling losses caused by aberrations in a free space communication system, using solely the fiber-coupled power metric. The system is based on a phase manipulations employed by a Spatial Light Modulator (SLM). The compensating phase is determined by an iterative feedback algorithm based on estimating the first 15 Zernike polynomials, and which takes into account the coupling between them. We developed the algorithm for best coupling as well as proved the concept in a setup based on a Liquid Crystal on Silicon (LCoS) SLM.
Keywords :
Zernike polynomials; feedback; liquid crystal on silicon; optical links; optical modulation; LCOS; Zernike polynomials; adaptive system; feedback mechanism; fiber-coupled optical power; fiber-coupled power metric; free-space optical communication link; iterative feedback algorithm; liquid crystal on silicon; phase manipulations; spatial light modulator; wavefront aberration correction; Adaptive optics; Couplings; Optical fiber communication; Optical fibers; Phase modulation; Polynomials; Adaptive optics; Optical communication; Optical feedback; Optical fiber coupling;
Conference_Titel :
Electrical and Electronics Engineers in Israel (IEEEI), 2010 IEEE 26th Convention of
Conference_Location :
Eliat
Print_ISBN :
978-1-4244-8681-6
DOI :
10.1109/EEEI.2010.5662079
