| 摘要 |
PURPOSE:To form a core consisting of a laser medium, etc., to a small diameter by forming a crystal fiber consisting of a host material, then implanting ions into the fiber to form the core part. CONSTITUTION:The crystal fiber consists of a single crystal of a host material. Various materials such as, for example, aluminum oxide, which can fix ions are used as the host material and prescribed ions are implanted thereto by an ion implantation method. Active ions which act as a laser, for example, heavy metal ions such as Cr<3+> and rare earth ions such as Nd<3+>, Er<3+> and Ho<3+> are used for the ions. The core consisting of the laser medium is formed in the crystal fiber when the active ions are implanted therein. The ions are thereby doped to a prescribed width in the prescribed position within the crystal fibers, by which the desired core is formed to the desired size. The small- diameter core is thus formed without being restricted by the strength of the fiber. |
