Patent ID: 8588559

Claim:
An optical coupler module adapted to be applied on a print circuit board for converting and transmitting a first electrical signal, the optical coupler module comprising: a semiconductor substrate disposed on the print circuit board; a first reflecting trench structure formed on the semiconductor substrate and defined by two surfaces wherein a first one of the surfaces is a slant surface; a first reflector formed on the slant surface of the first reflecting trench structure; a first strip trench structure formed on the semiconductor substrate, a first end of the first strip trench structure running through a second one of the surfaces of the first reflecting trench structure to connect with the first reflecting trench structure; a thin film disposed on the semiconductor substrate, the first reflecting trench structure and the first strip trench structure, wherein the thin film is a dielectric layer; a first light source unit disposed on the semiconductor substrate and the position of the first light source unit corresponding to the first reflector, for converting the first electrical signal into a first corresponding optical signal; a first optical waveguide structure formed in the first strip trench structure and extending to the first reflector; and a coupling unit disposed on the print circuit board and surrounding portions of surfaces of the semiconductor substrate for coupling the optical coupler module to an adapter; wherein the first corresponding optical signal provided by the first light source unit is directed into the first optical waveguide structure, reflected by the first reflector, and transmitted along the first optical waveguide structure to be outputted in sequence; as well as a refractive index of the thin film is less than that of the first optical waveguide structure so that the first corresponding optical signal is transmitted in the first optical waveguide structure with total internal reflection.