title: Polarization-maintaining amplifier employing double-clad bow-tie fiber.
abstract: We report a polarization-maintaining double-clad Yb-doped fiber amplifier employing bow-tie fiber. Borosilicate stress elements were incorporated into the inner cladding of the fiber, yielding a beat length of 5.1 mm at 633 nm. When the fiber was pumped at 975 nm and seeded with linearly polarized light, the polarization extinction ratio was >15 dB , independent of pump power, and the output power was as high as 3.5 W.
authors.forename: D A
authors.initials: DA
authors.lastname: Kliner
authors.forename: J P
authors.initials: JP
authors.lastname: Koplow
authors.forename: L
authors.initials: L
authors.lastname: Goldberg
authors.forename: A L
authors.initials: AL
authors.lastname: Carter
authors.forename: J A
authors.initials: JA
authors.lastname: Digweed