optic fiber and lasers

well I've been thinking on that for a while and.. anyone tried coupling a laser with a optic fiber and it worked, yeah it transfer data.. etc.
but.. have anyone tried coupling more than one wavelength lasers into a single optic fiber? like.. making a "white" laser, couple it on a optic fiber, and send 3 different signals (3 data connections) on a single cable, then decouple it and with some dichros, read the 3 different data on the output.

is it possible? any questions, ask here (I may draw it hahah).
I'm not really into optic fiber, thats just a thought.. I'm curious

That is how most fiber-optic communications carry signals. Several IR wavelengths are sent in the same fiber.

.....oh. total fail of my part. Thanks now I understand