Abstract
Amplified spontaneous emission (ASE) characteristics of a red fluorescent dye,
4-(dicy-anomethylene)-2-t-butyl-6(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran
(DCJTB), and a green fluorescent dye, (10-(2-benzothiazolyl)-1,1,7,7-tetramethyl-2,3,6,7-tetrahydro-1H,5H,11H-[1]
benzopyrano [6,7,8-ij]quinolizin-11-one)
(C545T) codoped polystyrene (PS) as the active medium were studied. It was found that the performance of ASE is greatly improved due to the introduction of C545T. By optimizing the concentrations of C545T and DCJTB in PS, an ASE threshold of
, net gain of
, and loss of
were obtained. The efficient Förster energy transfer from C545T to DCJTB was used to explain the improvement of the ASE performance in the coguest system.
© 2007 Optical Society of America
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