4 October 2000 Uranium glasses for passive Q-switching of eye-safe laser resonators
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The paper presents initial results of examination of glasses doped with uranium ions. In such material an effect of non- linear adsorption is possible within a spectral range of 1.5 micrometers . A synthesis of silicate glasses, silicate-borate and phosphate glasses doped with uranium ions was performed. Substantial thermal parameters as well as optical and spectroscopic properties of the obtained glasses were examined. It was stated that wide absorption band in a spectral region of 1.4 divided by 1.6 micrometers , originated from U2+ ions, appears only in phosphate glasses. U2+ doped phosphate glass shows non-linear absorption effect in this region. Absorber transmission varying with increase in energy density of the transmitted radiation of 1.535 micrometers was determined. A giant-pulse erbium glass laser, generation the pulses of energy of 8 mJ and duration 25 ns, was applied for these investigations. Energy density of a diagnostic pulse was changed within a range of 0.001 divided by 30 J/cm3. Non-active losses, absorption cross section, saturation energy, concentration of active media, relaxation time, and energy losses for absorber bleaching were determined.
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Zygmunt Mierczyk, Ryszard Stepien, Jadwiga Mierczyk, "Uranium glasses for passive Q-switching of eye-safe laser resonators", Proc. SPIE 4237, Laser Technology VI: Progress in Lasers, (4 October 2000); doi: 10.1117/12.402851; https://doi.org/10.1117/12.402851

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