A function expanding system is provided and includes an image capturing device and a function expanding stand. By detecting anchors proximal to annotations made by a reader, a collection of the annotated anchors and the related documents may be organized and generated for a reader to process according to their desires. A refractive index is modified in an affected region in the substrate along the waveguide propagation axis via the ultrashort laser pulse focus, and the ultrashort laser pulse focus is moved in a direction other than the waveguide propagation axis to generate a widened affected region along the waveguide propagation axis.