Abstract: Cassette for containing an optical fiber-containing device, having a bundle of optical fibers extending out of the cassette, comprising means (9.sub.i) to attach an end of the bundle onto the cassette and a hardened adhesive product (13) in order to rigidify this end of the bundle of tubes (11.sub.i) following a stable geometrical configuration suitable for withstanding mechanical bending capable of generating curvature losses in optical signals transmitted through the fibers. The cassette has particular applicability to housing integrated optical components comprising optical fibers, for use in telecommunication networks.