Optical fiber bundle and a method of manufacturing the same

Improved ultraviolet resistance in the wavelength band of the wavelength 150nm~250nm is to provide an optical fiber bundle and a manufacturing method thereof which can be easily and inexpensively manufactured without the risk of explosion at the time of manufacture. The optical fiber bundle, an optical fiber having a clad core and fluorine mainly composed of silica glass is made of the added silica glass are bundled plurality of hydrogen or heavy ends optically transparent sealed container sealed with hydrogen, the volume of the vessel is less than 10 times the volume of the glass of the optical fiber. Further, this method of manufacturing an optical fiber bundle comprises the steps of impregnating a hydrogen or deuterium in the optical fiber by maintaining the optical fiber in the hydrogen or deuterium atmosphere, from the optical fiber hydrogen or deuterium is eliminated before a, a step of placing in the container an optical fiber as the optical fiber bundle, a process to seal the container, for sealing desorbed hydrogen or deuterium from the optical fiber in the container.