title: Narrow-line, 1178nm CW bismuth-doped fiber laser with 6.4W output for direct frequency doubling.
abstract: We achieved a 0.2nm linewidth output at 1178nm with powers up to 6.4W in a linear 80m Bismuth-doped fiber cavity pumped by a 55W Yb fibre laser. The potential of frequency doubling of the non-polarized output at 1178nm in MgO doped periodically poled lithium niobate was demonstrated and resulted in 125mW average power at 589nm. The approach can be extended to a linearly-polarized large mode area format with under 0.1nm linewidth capable of scaling to Watts level in the 560-620nm range.
authors.forename: A B
authors.initials: AB
authors.lastname: Rulkov
authors.forename: A A
authors.initials: AA
authors.lastname: Ferin
authors.forename: S V
authors.initials: SV
authors.lastname: Popov
authors.forename: J R
authors.initials: JR
authors.lastname: Taylor
authors.forename: I
authors.initials: I
authors.lastname: Razdobreev
authors.forename: L
authors.initials: L
authors.lastname: Bigot
authors.forename: G
authors.initials: G
authors.lastname: Bouwmans