A novel infrared laser dye absorbing 1455 nm was synthesized.The properties ofswitching and mode-locking for different lasers were investigated. A Q-switched 1064 urnlaser with a polysulfone film works satisfactorily. The pulse width is 10 ns. The dyesolutions in DMSO, Iodoethane, 1, 2-Dichloroethylene show excellent properties in modelocking 1340 nm lasers. The pulse widths are 90～100 ps.