Patent ID: 7509002

Claim:
A system for transmitting light, the system comprising: a transmitter including an adaptive algorithm function, a spatial light modulator (SLM), a Fourier lens, and an on-off keying (OOK) modulator; a multimode fiber (MMF); wherein the output modulating signal is spatially Fourier-transformed with Fourier lens, spatially filtered with said SLM, spatially inverse Fourier-transformed, and coupled into said MMF; a receiver including a photodetector, a clock and data recovering function, and an intersymbol interference (ISI) estimation circuit; wherein said clock and data recovery function processes the output of said photodetector, and said ISI estimation circuit processes the output of said clock and data recovering function; wherein ISI cost function is output from said ISI estimation circuit and fed back to said transmitter via a low-rate feedback channel, wherein said adaptive algorithm function computes updates to pixel settings of said SLM.