An amplitude Mask to be periodically laser Light to an optical fiber when making a Grid of long period and apparatus for Manufacturing a filter for the grid.

摘要

It provides an amplitude Mask, and apparatus and Method for Manufacturing a Long Filter period Pattern using the same.When a Grid of long period sefabrica selectively passing laser Light to an optical fiber, u00e1scara Lam's laser Light periodicamentea amplitude Optical Fiber.The amplitude Mask includes two Masks that have periodically Alternative Transit areas for the laser Light and areas are not step to prevent the passage of the luzlu00e1se R,Where the two Masks are continuously rotate in opposite directions. Therefore, the traffic changes continuously.In this mask, two masks, each of which has a Predetermined period, sonrotada sen opposite directions, to provide, in this way,A period of amplitude Mask that depends on the angle of rotation. The period of the amplitude Mask can be changed continuously.