Method and apparatus for effecting alignment in an optical apparatus

An optical apparatus ( 110 ) includes a base member ( 121 ) with a plurality of grooves ( 181-187, 191-197 ), and includes a respective lens ( 11-17 ) fixedly mounted in each groove. Optical filters ( 31-35 ) are mounted on the support member in predetermined locations. One such lens is fixedly secured to an input optical fiber ( 21 ), and the input fiber is used to introduce radiation into the apparatus. Several output optical fibers ( 22-27 ) are successively positioned in relation to respective lenses by a fiber positioner ( 302 ), which monitors the amount of radiation passing through the fiber being positioned, and then causes a laser ( 303 ) to fuse the fiber end to the associated lens in a selected position.