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31 March 1997 Molecular engineering and photostability of laser dyes within sol-gel hosts
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Abstract
The use of solid-state dye laser for commercial applications has been limited largely by the poor photostability of the gain medium. Techniques are examined to improve the photostability of Coumarin and Pyrromethene-BF2 567 (PM- 567) laser dyes within xerogel and Polyceram hosts synthesized by sol-gel processing. The photochemical mechanisms by which laser dyes degrade are discussed and determined specifically for PM-567. PM-567 was determined to degrade both by photo-oxidation and acid degradation. Techniques for improving photostability are described from a molecular engineering perspective. These techniques include: covalently attaching the laser dye to the host; controlling the chemical environment of the dye; increasing dye caging by increasing the SiO2 content; removing porosity from the host; and incorporating additives such as hindered amine light stabilizers to minimize photodegradation.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Tayyab I. Suratwala, Kevin Davidson, Zack Gardlund, Donald R. Uhlmann, Sandra I. Bonilla, and Nasser Peyghambarian "Molecular engineering and photostability of laser dyes within sol-gel hosts", Proc. SPIE 2986, Solid State Lasers VI, (31 March 1997); https://doi.org/10.1117/12.269991
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