OPTICAL FIBER, FIBER LASER, AND OPTICAL FIBER MANUFACTURING METHOD
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United States of America Patent
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app pub date -
Mar 17, 2014
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Sep 20, 2011
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Abstract
An optical fiber of the present invention includes an uncoated FBG fiber in which an FBG mirror is written in a core glass, a first optical fiber that is spliced to one end of the FBG fiber with a first spliced point interposed therebetween, and a second optical fiber that is spliced to the other end of the FBG fiber with a second spliced point interposed therebetween. The optical fiber of the present invention also includes a collectively recoated portion in which at least the FBG fiber, the first spliced point, and the second spliced point are collectively recoated with a recoat resin having a refractive index less than that of silica, the FBG fiber being sandwiched between the first spliced point and the second spliced point.
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