OPTICAL FIBER, AND METHOD OF MANUFACTURING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an optical fiber of a flank emission type which has constant quality and can uniformly emit light outside with excellent reproducibility. SOLUTION: The optical fiber having a core in the central part and a clad which is disposed at the peripheral edge of this core and has a refractive index lower than the refractive index of the core is so constituted that a rugged structure is imparted between the core and the clad along the circumferential and longitudinal directions of the fiber.