White light emission on amplified spontaneous emission with dye content controlled polymer system

White light emission from amplified spontaneous emission (ASE) was realized by optically pumping fluorescent dye 4-(dicy-anomethylene)-2-t-butyl-6(1,1,7,7- tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB) doped semiconducting poly(9,9-dioctylfluorene) (PFO) polymer thin films. Two individual ASE peaks originating from DCJTB and PFO were observed by carefully controlling the DCJTB concentration in PFO. The studies of the ASE characteristics of DCJTB:PFO thin films lead to the conclusion that the DCJTB:PFO system with 0.3% w/w DCJTB dopant concentration in PFO showed the best ASE performance. In the DCJTB:PFO system with 0.3% w/w DCJTB dopant concentration, the net gains, loss coefficients, and threshold reached 36.3 and 22.35 cm-1, 7.39 and 15.88 cm-1, and 0.072 and 0.035 mJ pulse-1, for DCJTB emission and PFO emission, respectively. Our results predict an approach to achieve white light emission through amplified spontaneous emission in host polymer systems via controlled dye content.