Light-coupling device

A light-coupling device, comprising:

• an interposer having a top recess forming a locating slot;
• an optical chip disposed on top of the interposer, the optical chip having a waveguide layer, a light-emitting surface of the waveguide layer being located at an edge of the optical chip;
• an optical waveguide element having a bottom portion fixed in the locating slot and being disposed outside the optical chip on top of the interposer along an exterior side of the optical chip, the optical waveguide element including an incident surface facing the light-emitting surface, an emergent surface located at a top surface of the optical waveguide element, and a reflective surface located inside the optical waveguide element, a light beam emitted horizontally from the light-emitting surface entering the optical waveguide element through the incident surface, the light beam being totally reflected through the reflective surface and outputting a parallel light beam in a vertical direction through the emergent surface;
• and
• a fiber array connector disposed on top of the optical chip, the fiber array connector including a carrier, an optical waveguide lens fixed to the carrier, and a plurality of fibers, the optical waveguide lens facing the emergent surface, one of two sides of the optical waveguide lens at a horizontal direction being a tilted reflective surface while the other being a light-coupling surface aligned with the fibers, the parallel light beam being totally reflected through the tilted reflective surface after entering the optical waveguide lens and coupled to the fibers in the horizontal direction;
• wherein the optical waveguide element has two opposite sides, the optical chip including the waveguide layer is disposed on one side of the optical waveguide element having the incident surface, and another element different from the optical chip is disposed next to the optical waveguide on the other side of the optical waveguide element on top of the interposer below the fiber array connector.