DOUBLE-CORE FIBER, OPTICAL COUPLING DEVICE USING THE SAME, SIGNAL LIGHT EXCITATION OPTICAL COUPLING DEVICE, FIBER AMPLIFIER, AND FIBER LASER
- 申请公布号：
- JP2008203496(A)
- 申请号：
- JP20070039058
- 申请日期：
- 2007.02.20
- 申请公布日期：
- 2008.09.04
- 申请人：
- FUJIKURA LTD
- 发明人：
- TANIGAWA SHOJI
- 分类号：
- G02B6/036;G02B6/02;H01S3/06
- 主分类号：
- G02B6/036
- 摘要：
- <p><P>PROBLEM TO BE SOLVED: To provide a double-core fiber which can maintain an optical confinement level having a resistance to disturbance over the longitudinal direction of waveguide structure of a core even when the variation rate of outside diameter is large and can perform rigid waveguide. <P>SOLUTION: The double-core fiber is a mode field converting fiber which converts a mode field diameter while changing the outside diameter over the longitudinal direction, and composed essentially of silica glass, wherein the refractive-index structure of the core is a double layer structure, on the thicker outside diameter side, a single layer core of the inner side substantially acts as a single mode waveguide of only a fundamental mode and, on the thinner outside diameter side, a double layer core substantially acts as the single mode waveguide of only the fundamental mode. <P>COPYRIGHT: (C)2008,JPO&INPIT</p>
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