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서홍석,최영규,Kyung Hon Kim,Hoon Jeong,Kyunghwn Oh 한국전자통신연구원 2002 ETRI Journal Vol.24 No.3
We created a new design for an Nd-doped clad-pumped silica fiber laser to enhance the pump absorption and lasing efficiency for a butt-coupled, end-pumped scheme. Two concatenated adiabatic tapers formed within the laser cavity simultaneously removed higher order modes and were spliced to conventional single mode fibers. We theoretically analyzed mode propagation along the composite cavity and experimentally achieved continuous wave osci llation in the LP01 mode at 1.06 mm and a laser output power of over 820 mW with a slope efficiency of 27%.