Cobalt-doped transparent glass ceramic as a saturable absorber Q switch for erbium:glass lasers
2001; Optica Publishing Group; Volume: 40; Issue: 24 Linguagem: Inglês
10.1364/ao.40.004322
ISSN0003-6935
AutoresA. M. Malyarevich, Igor A. Denisov, K. V. Yumashev, О. С. Дымшиц, А. А. Жилин, Ук Канг,
Tópico(s)Laser-Matter Interactions and Applications
ResumoA new saturable absorber Q switch for 1.54-mum Er:glass lasers is presented. The saturable absorber is a transparent glass ceramic that contains magnesium-aluminum spinel nanocrystallites doped with tetrahedrally coordinated Co(2+) ions. We obtained Q-switched pulses of up to 5.5 mJ in energy and 80 ns in duration at 1.54 mum. The relaxation time of (4)A(2) ?(4)T(1)((4)F) transition bleaching was measured to be (450 ? 150) ns. Ground-state and excited-state absorption cross sections at 1.54-mum wavelength were estimated to be (3.2 ? 0.4) x 10(-19) cm(2) and (5.0 ? 0.6) x 10(-20) cm(2), respectively.
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