The effect of the type of polymer used to disperse Single-Walled Carbon Nanotubes (SWNTs) on the optical limiting performances of the resulting dispersions was studied. One conjugated polymer Poly(9,9-di-n-hexylfluorenyl-2,7-diyl) (PFO) possessing a flexible backbone, and two conjugated polymers Poly(2,5-dioctylphenylene1,4-ethynylene) (PPE), and Poly(9,9-dioctylfluorenyl-2,7-yleneethynylene) (...