| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method and device for monitoring light capable of monitoring light propagating in an optical fiber with simple configuration having a small number of components without generating a large connection loss or Fresnel reflection, and without requiring precise adjustment of optical components. <P>SOLUTION: The method is characterized by receiving leakage light leaking from a butting part 30 where each optical fiber 10, 10 end face is butted together. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
