15 February 2012 High power single-mode fiber laser and a multi-mode delivery cable
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Over 500W output power Yb doped single-mode fiber laser demonstrates excellent beam quality of less than 1.1 M2 value. Use of single mode fiber as delivery cable enables small spot-size; however delivery length is limited by SRS in fiber. To mitigate this characteristic, use of multi-mode fiber for delivery is one of approach. We present our design of 500W single mode fiber laser and beam quality measurement of multi-mode delivery fiber. How they vary, how we can homogenize beam depend on different condition of connection style, etc. We also present material process results in different beam performance.
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Kosuke Kashiwagi, Kosuke Kashiwagi, Takashi Kayahara, Takashi Kayahara, Yoshihiro Emori, Yoshihiro Emori, Akira Fujisaki, Akira Fujisaki, } "High power single-mode fiber laser and a multi-mode delivery cable", Proc. SPIE 8237, Fiber Lasers IX: Technology, Systems, and Applications, 823728 (15 February 2012); doi: 10.1117/12.908256; https://doi.org/10.1117/12.908256

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