An object of the present disclosure is to enable LPG applied over the entire length of an optical fiber without inhibiting an operation of taking out the optical fiber.

The present disclosure relates to an optical fiber cable in which at least one or more optical fibers for transmission in at least two or more modes are gathered, the optical fiber cable including: a linear material abutting on at least one of the optical fibers, in which a thickness of the linear material periodically varies in a longitudinal direction of the linear material.

In some implementations, an optical component includes an optical medium, the optical medium having a surface, wherein the surface includes one or more hydroxyl group terminations; and a surface layer chemically bonded to the optical medium, such that the surface layer has a thickness of less than 10 nanometers and is a hydrophobic surface, the surface layer including at least one of: a hexamethyldisilazane material, a polysiloxane material, a polydimethylsiloxane material, a fluoro-polymer material, an organosilicon material, or an organofluorine material.