The fiber type dye laser composed by modulating a commercial grade plastic fiber has been studied. One is the active clad type and the other is the coupling waveguide type. These active fiber pumped by a pulsed N2 laser generate the intense emission of the superradiant mode with the spectrum width of 35 nm.

The tuning property of the fiber sheet type dye laser has been studied. When the array of the active fibers doped with a laser dye in a plastic core is pumped by a pulsed N2 laser, the fiber dye laser emission with narrow spectrum is obtained in wide wavelength region.