Mode-locked operation in thulium-holmium doped fiber laser based on Cr2AlC MAX phase SA coated arc-shaped fiber

Bimetallic solid solution MAX phase Ti2NbAlC2 as saturable absorber for passively Q-switched Er3+-doped fiber laser

“…Figures 1(a) and (b) illustrate the crystal structure and layered structure of (Ti 1−x Nb x ) 3 AlC 2 solid solutions (x = 1/3 in this work), respectively [31]. Recently, multiple MAX phases have been used as SAs in the realm of pulse laser, for example, Cr 2 AlC [32], Nb 2 AlC [33,34], Ta 2 AlC [35], Ta 4 AlC 3 [36], Ti 2 AlC [37,38], Ti 2 AlN [39], Ti 3 AlC 2 [40], V 2 AlC [41]. To our knowledge, the Ti 2 NbAlC 2 has not been reported as a saturable absorber so far.…”