Research of fiber Bragg gratings inscription by the method of translation of a laser beam relative to a phase mask

The paper demonstrates the research of a fiber Bragg gratings inscription method including translation of a laser beam relative to a phase mask. Passing laser radiation through a phase mask results in diffraction into +1 and −1 orders, which makes it possible to inscribe FBGs inside a fiber core and the laser beam translation allows to obtain long apodized gratings. For each Bragg grating, the dependences of optical characteristics on the parameters of laser radiation are established. The result of inscription FBGs to obtain laser generation is presented in the article as well.