A polymeric multilayered mirror doped with a saturable dye worked as a passive Q-switch of a laser-diode-pumped microchip laser. The multilayered mirror consisted of alternately spin-coated layers of polyvinylcarbazole (PVK) and cellulose acetate on a glass substrate. A dye of bis-(dimethylaminodithiobenzil)-nickel was doped in one of the layers of PVK, providing the repetitively Q-switched pulses. The pulse width and repetition rate were and , respectively, for a laser-cavity length of , and the average and the peak power were and , respectively, for the highest pump power of . The dependence of the Q-switched characteristics on the pump power and on the concentration of the doped dye is described.
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