LOW-LOSS OPTICAL FIBER OVER WIDE WAVELENGTH RANGE AND METHOD OF MANUFACTURING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a low-loss optical fiber over a wide wavelength range that has a low-loss in a broad range of wavelengths from a visible light region (400-750 nm) to a near-infrared light region (up to 1400 nm), and to provide a method of manufacturing the same.SOLUTION: A low-loss optical fiber over a wide wavelength range has a transmission loss of less than or equal to 40 dB/km in a whole wavelength range of 400-1400 nm, and being manufactured by drawing an optical fiber preform including a core composed of a silica glass having an OH group concentration of less than or equal to 1 ppm and a cladding composed of a silica glass having a fluorine concentration of more than or equal to 3.2 wt.%.