Dy3+ doped Ge-As-S fiber for 2.96 μm fiber laser

Dy
³⁺
doped Ge-As-S glasses have been investigated for 2.96 mum fiber laser pumped at 1.7 mum. Ge
₁₀
As
₂₅
S
₆₅
and Ge
₉
As
₂₃
S
₆₈
were determined as core and clad compostion, respectively for fiber drawing. Ge
₁₀
As
₂₅
S
₆₅
fiber showed ~2 dB/m loss at 1.7 mum.