Abstract
The study are concentrated on the emission behaviors of an optically pumped composite thin-flm organic laser. As a high gain material, DCJTB reveals strongly ASE phenomenon that often rises under su±cient pumping energy and distance. The gain properties of the dye doped planar waveguide (DCJTB:PVK and DCJTB:PS) were therefore measured and analyzed via ASE theory. In order to suppress the undesired side modes and obtain the lower threshold gain, one-dimensional DFB structures were adopted. Based on the coupling wave theory, we simulated and designed various types of DFB laser caviities. The second order organic DFB lasers were fabricated with different duty cycles by electron beam lithography and spin-casting technique. With an efficient laser cavity and high gain material, lasing action were observed in the designed DFB integrated device.