| 摘要 |
<p>The present invention provides a computer controlled apparatus and method for producing high quality fiber optic Bragg gratings. According to the invention, the apparatus (10) preferably includes a laser (12) for generating an ultraviolet beam (18), a rotatable prism (32) disposed downstream of the laser (12) for receiving the beam (18) and an optical fiber (48) disposed adjacent a bottom edge (84) of the prism (32) for receiving a high fringe frequency interferrogram (86) formed by the prism (32). The prism (32) is coupled to a rotation stage (14) for rotating the prism (32) about a pre-selected pivot point (36) relative to the angle of incidence of the beam (18) to vary the Bragg wavelength at the fiber core. <IMAGE></p> |
