Yes, tungsten needles can be used for optical fiber manufacturing. The production of optical fibers requires precise alignment of the fiber components, which can be achieved using tungsten needles as tools. Tungsten needles can be used for splicing fibers, shaping the fiber end faces, and for polishing the fiber surface. The high melting point, strength, and durability of tungsten make it an excellent material for these applications. Additionally, tungsten’s thermal and chemical stability make it an ideal material for use in high-temperature environments and for applications that require exposure to corrosive substances.