title: Ytterbium-sensitized Thulium-doped fiber laser in the near-IR with 980 nm pumping.
abstract: The use of an unidirectional auxiliary pump at approximately 1600 nm in conjunction with a 980 nm primary pump for Ytterbium (Yb(3+))-sensitized-Thulium (Tm(3+))-doped single mode silica fiber (YTDF) is found to be very effective to activate the most significant resonance energy transfer from Yb(3+) to Tm(3+), in order to obtain significant emission in the near-infrared. The resulting laser performance of the YTDF at 1874 nm is reported here. The influence of the Tm(3+)/Yb(3+) concentration, their relative proportions and the host glass composition on the lasing efficiency has also been investigated to optimize the fiber parameters for maximum laser output power.
authors.affiliation: Fiber Optics Laboratory, Central Glass & Ceramic Research Institute,196, Raja S.C. Mullick Road, Kolkata, India.
authors.forename: Atasi
authors.initials: A
authors.lastname: Pal
authors.forename: Anirban
authors.initials: A
authors.lastname: Dhar
authors.forename: Shyamal
authors.initials: S
authors.lastname: Das
authors.forename: Shu Ying
authors.initials: SY
authors.lastname: Chen
authors.forename: Tong
authors.initials: T
authors.lastname: Sun
authors.forename: Ranjan
authors.initials: R
authors.lastname: Sen
authors.forename: Kenneth T V
authors.initials: KT
authors.lastname: Grattan