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Opt Express. 2010 Mar 1;18(5):5068-74. doi: 10.1364/OE.18.005068.

Ytterbium-sensitized Thulium-doped fiber laser in the near-IR with 980 nm pumping.

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Fiber Optics Laboratory, Central Glass & Ceramic Research Institute,196, Raja S.C. Mullick Road, Kolkata, India.


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.

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