Graded-index poly(methyl methacrylate) optical fibers (GI POF) containing a
Nd-chelate have been fabricated. The absorption spectrum of the fiber exhi
bited several strong bands in the visible and infrared regions. We have obs
erved infrared fluorescence (0.90, 1.06, and 1.3 mu m) of the Nd3+ ion of t
he fiber at room temperature when it was pumped with an Ar+-pumped dye lase
r at 580 nm.