Optical Module and Fabrication Method of the Same

An optical module, comprising:

• a first and a second optical waveguide approaching each other on the upper side of a substrate;
• a third and a fourth optical waveguide approaching each other, having the approaching area which is connected to the first and the second optical waveguide in extension;
• a cutout at the approaching area, comprising a first slant for cutting the first and second optical waveguide with a first cutting angle, and a second slant for cutting the third and fourth optical waveguide with a second cutting angle;
• and
• a film-filter formed on the approaching area.

An optical module, comprising:

• a first and a second optical waveguide approaching each other on the upper side of a substrate;
• a third and a fourth optical waveguide approaching each other, having the approaching area which is connected to the first and the second optical waveguide in extension;
• a cutout at the approaching area, comprising a first slant for cutting the first and second optical waveguide with a first cutting angle, and a second slant for cutting the first and second optical waveguide with a second cutting angle;
• and
• a film-filter formed on the approaching area.

An optical module, comprising a first and a second optical waveguide approaching each other on the upper side of a substrate;

• a cutout at the approaching area, composed of a slant, cutting the first and second optical waveguide with an angle;
• and
• a film-filter formed on the approaching area,
• wherein the first optical waveguide makes a first incidence angle with respect to the projection of the normal of the slant in the plane of the substrate, and the second optical waveguide receives the light from the first optical waveguide reflected by the slant and the film-filter.

An optical module comprising a first and a second unit of the optical module, which are connected each other:

• Wherein the first unit of optical module, comprising a first and a second optical waveguide approaching each other on the upper side of a substrate;
• a first cutout at the approaching area, composed of a first slant, cutting the first and the second optical waveguide with an angle;
• and a first film-filter formed on the approaching area:
• The first optical waveguide makes a first angle of incidence with respect to the projection of the surface normal of the first slant in the plane of the substrate, and the second optical waveguide receives the light from the first optical waveguide reflected by the first slant and the first film-filter:
• Wherein the second unit of optical module, comprising the second and a third optical waveguide approaching each other on the upper side of a substrate;
• a second cutout at the second approaching area, composed of a second slant, cutting the second and third optical waveguide with an angle;
• and a second film-filter formed on the second approaching area:
• The second optical waveguide makes a second angle of incidence with respect to the projection of the surface normal of the second slant in the plane of the substrate, and the third optical waveguide receives the light from the second optical waveguide reflected by the second slant and the second film-filter.

A fabrication method of an optical module comprising:

• forming the optical waveguide on the wafer substrate;
• forming the cutout with at least two slant surfaces from the front-side or from the back-side of the substrate passing at least the core of the optical waveguide;
• and
• coating the optical films on the slant optionally and on the area of approaching waveguides.