| 摘要 |
PURPOSE:To prepare stressed single polarization optical fiber having higher quality with better dimensional precision than conventional product inexpensively by prepg. a parent material for optical fiber by the sol-gel method and drawing the parent material. CONSTITUTION:A wet gel contg. a section for constituting a clad section 3, core constituting section 1, and stressed section 2 in the optical fiber to be formed from the parent material by the sol-gel method is prepd. The wet gel is dried and sintered to prepare the titled single polarization optical fiber. The clad sol for constituting the afore-mentioned clad section is poured into a cylindrical vessel provided with a freely attachable and detachable mold fixed to a necessary position. The sol for constituting the core and for pit are poured into plural cavities formed after detaching the mold, and poured sol are gelled. Thus, the above-described wet gel is prepd. preferably. |
