OPTICAL FIBER PREFORM USED FOR ENERGY TRANSMISSION OR ULTRAVIOLET LIGHT TRANSMISSION AND METHOD OF MANUFACTURING THE OPTICAL FIBER PREFORM

摘要

This object aims to provide an optical fiber preform and a method of manufacturing the optical fiber preform that is suitable for the manufacturing of an optical fiber used for energy transmission or ultraviolet light transmission, wherein the optical fiber has good transmittance for high energy light or ultraviolet light that is equal to or more than 50KW/cm2 at the peak power of laser transmitting through the optical fiber and has good durability that does not cause substantial deterioration in irradiation of both the high energy and ultraviolet light. The optical fiber preform used for energy transmission or ultraviolet light transmission is provided with a core and a clad, each of which is made of quartz glass. The core has average OH density=0-10ppm, average O2 density=1015/cm3, average ODC (I) density=1013/cm3, average ODC (II) density=1012/cm3, and average F density=1000ppm. The clad has average OH density=0-10ppm, average F density=7000ppm, average O2 density=1016/cm3, average ODC (I) density=1013/cm3, and average ODC (II) density=1012/cm3.