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Passively Q-switched Er-Yb double clad fiber laser with Cr<sup>2+</sup>:ZnSe and Co<sup>2+</sup>:MgAl<sub>2</sub>O<sub>4</sub> as a saturable absorber

Abstract

Passive Q-switching of fiber lasers with saturable absorbers have attracted attention because of simplicity and high efficiency. However, the number of known materials which can be used as a saturable absorber is relatively limited due to the features of fiber lasers. While liquefying gallium mirror, semiconductor structures (SESAM), as well as Co as saturable absorbers

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