| 摘要 |
<P>PROBLEM TO BE SOLVED: To overcome the problem that conventionally, when light is introduced into an optical fiber having a function of amplifying the light of an excitation laser, the light leaking from the optical fiber due to mismatch in the NA between the excitation laser and the optical fiber or due to shift after adjustment is absorbed by a coated material such as a buffer or a jacket of the optical fiber, and this may cause hazard such as heat generation and deterioration in the characteristics. <P>SOLUTION: A translucent material is disposed adjacent to the rear end of the coated material in the propagation direction of the light in the coated optical fiber, the coated material surrounding the peripheral face of a coated optical fiber comprising a light-propagating medium, so that at least part of the light propagating in the coated optical fiber is transmitted and emitted to the outside through a sloped part of the translucent material. This avoids intensive absorption of the light energy by the coating, and heat generation and deterioration in the characteristics accompanying the absorption. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
