INVESTIGADORES
SCAFFARDI Lucia Beatriz
artículos
Título:
PHOTOTHERMAL CHARACTERIZATION AND STABILITY ANALYSIS OF POLYMERIC DYE LASERS
Autor/es:
R. DUCHOWICZ; L. SCAFFARDI; A. COSTELA; I. GARCÍA-MORENO; R. SASTRE ; A.U. ACUÑA
Revista:
APPLIED OPTICS
Editorial:
OPTICAL SOC AMER
Referencias:
Lugar: Washington; Año: 2000 vol. 39 p. 4959 - 4963
ISSN:
0003-6935
Resumen:
The millisecond heat dissipation of pump energy in polymeric, solid-state dye lasers has been studied withphotothermal deflection spectroscopy ~PTDS! to determine the contribution of that process to photodegradationof the active material. The samples were solutions of Rhodamine 6G in 2-hydroxyethyl methacrylatecopolymerized with various amounts of methyl methacrylate or ethylene glycol dimethylacrylateto change the microstructure properties of the matrix. Values of the thermal diffusivity measured withPTDS were in the range 0.6–1.1 3 1023 cm2 s21 for all the compositions studied here. A comparison ofthese values with previous optical data on lasing efficiency and photostability for the same samplesindicates that the macroscopic rate of thermal diffusion is not the key factor that limits the efficiency andstability of these lasers, at least for low pump repetition rates ~,1 Hz!. © 2000 Optical Society ofAmericaOCIS codes: 140.0140, 140.2050, 160.3380, 160.5470, 300.6430, 350.5340.