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Applied Physics B

, Volume 75, Issue 6–7, pp 687–694 | Cite as

Time-resolved thermal lens study on the heat dissipation effects in solid polymeric matrices used as laser dyes

  • M. Pons
  • S. Nonell
  • I. García-Moreno
  • Á. Costela
  • R. Sastre

Abstract.

A dual-beam pulsed-laser time-resolved thermal lens (TRTL) has been used to study the heat dissipation effects in solid polymers employed as laser dyes. The laser-dye samples studied are polymer solutions of rhodamine 6G (Rh6G), namely homopolymers of methyl methacrylate (MMA) and copolymers of methyl methacrylate and 2-hydroxyethyl methacrylate (HEMA) with MMA:HEMA compositions 1:1 and 7:3 vol./vol., where the dye is either dissolved or modified and copolymerized with methacrylate monomers. The long-term stability of the laser material is independent of the thermal diffusivity of the samples, as determined by the TRTL technique. This suggests that the rate of heat dissipation does not play a major role in the photostability of the samples. In contrast, the TRTL experiments have revealed permanent changes in the optical properties of the polymers when subjected to a large number of laser pulses. This is explained in terms of permanent plastic deformation of the matrices.

PACS: 81.70.C; 40.70.H; 42.55Mv; 42.70.Hj; 42.70.JK 

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Copyright information

© Springer-Verlag 2002

Authors and Affiliations

  • M. Pons
    • 1
  • S. Nonell
    • 1
  • I. García-Moreno
    • 2
  • Á. Costela
    • 2
  • R. Sastre
    • 3
  1. 1.Grup d’Enginyeria Molecular (GEM), Institut Químic de Sarrià, Universitat Ramon Llull; Via Augusta 390, 08017 Barcelona, SpainES
  2. 2.Instituto de Química Física Rocasolano, CSIC, Serrano, 119, 28006 Madrid, SpainES
  3. 3.Instituto de Ciencia y Tecnología de los Polímeros, CSIC, Juan de la Cierva, 3, 28006 Madrid, SpainES

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