10 W CW ytterbium-doped fiber laser with 4 × 1 fused fiber bundle combiner

• DOI: 10.1007/s12200-008-0039-8
• Publication Date: 2009-03-12T02:53:58Z
• Authors: Jihuang Zhang; Chao Yang; Chuan Huang; Yuhua Li; Nengli Dai; Peixiang Lu; Zuowen Jiang; Wei Chen; Jinyan Li
• Keywords: 0103 physical sciences; 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology; 01 natural sciences; 7. Clean energy

An ytterbium-doped double-clad fiber laser with one-end pumped by four 915 nm laser diodes (LDs) combined by a homemade multimode fused fiber bundle combiner is proposed. The combiner, fused by splicing four fiber pigtails from diodes, exhibits a good capability of low-loss and a high efficiency of 92.7%. The fiber laser, which can generate a continuous-wave (CW) up to 10.3 W output power at 1104 nm with a homemade D-shape inner cladding ytterbium-doped fiber, is demonstrated. The slope efficiency is about 65% and the optical-to-optical conversion efficiency with respect to the pump power is 46% at its maximum output laser power.