Apparatus for manufacturing arrays of the fiber has a long period of time with a small addiction on the polarization and arrays of the fiber has long periods produced with that - ci

摘要

It provides an apparatus for the manufacture of the networks of the fiber with a long period of time with a slight dependency on the polarization, and a network of the fiber with a long period, manufactured by the apparatus. This apparatus includes an optical fiber (406), one end of which has been directed at least once with respect to the other end, a laser source ultra violet - (400) and a mask of amplitude (404) arranged on the optical fiber for transmitting the light emitted from the laser source ultra violet - (400), at intervals that are periodic. In the manufacture of networks of the fiber with a long period, the refractive index of a core of the optical fiber is disturbed by irradiating the light w towards an optical fiber (406) twisted or by irradiating the light w towards an optical fiber, which rotates, so that the disturbances isotropic in the refractive index can be carried out when it is seen on the total length of the optical fiber.