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PUMP COMBINER AND OPTICAL AMPLIFICATION DEVICE 发明申请

2023-07-23 1950 63K 0

专利信息

申请日期 2025-07-01 申请号 JP2007279146
公开(公告)号 JP2009111022A 公开(公告)日 2009-05-21
公开国别 JP 申请人省市代码 全国
申请人 FUJIKURA LTD
简介 PROBLEM TO BE SOLVED : To provide a pump combiner that can improve the reliability of laser equipment by preventing a core from being damaged when high-intensity light having a large peak value is made incident, and an optical amplification device. SOLUTION : Disclosed is the pump combiner having a bridge fiber so that a plurality of optical fibers propagating signal light and pumping light are connected to one end and a rare-earth added fiber is connected to the extended other end side. The pump combiner is characterized in that the extension portion of the bridge fiber satisfies a relation of A>(1/B) by thermally diffusing a dopant added to the core of the fiber, where A is an MFD enlargement ratio of the core which is a multiple of the MFD of the core after thermal diffusion to the MFD of the original core at a predetermined position, and B is a ratio (B=b2/b1) of a fiber external diameter b2 after drawn to the original fiber external diameter b1 of a drawn portion at the predetermined position. COPYRIGHT : (C)2009, JPO&INPIT


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