Optical coupling device having silicon optical bench and optical fiber with angled end face
View Patent ↗The present invention relates to an optical transmittance device including an optical fiber having a tilted incident plane and a silicon optical bench (SiOB) with a mirror plane. In accordance with the present invention, there provided an optical device, including: a substrate having a groove with a tilted surface, wherein the groove has a mirror plane on the tilted surface; a light emitting means aligned to the substrate; and an optical fiber including a tilted incident plane, wherein a reflected light from the mirror plane is incident to the tilted incident plane.
1. An optical device, comprising:
a substrate;
a groove being formed within the substrate and having a tilted surface with an ‘A’ degree of a tilt angle at one side, wherein the groove has a mirror plane on the tilted surface;
a light emitting means aligned to the substrate; and
an optical fiber wherein the index of refraction of a core is n core and an incident plane that receives a reflection light from the mirror plane has a ‘B’ degree of a tilt angle,
wherein the tilt angles ‘A’ and ‘B’ and the index of refraction of the core satisfy a specific condition that sin(2A−B)=n core ×sin B.
2. The optical device as recited in claim 1 , the substrate is a silicon optical bench.
3. The optical device as recited in claim 1 , wherein the light emitting means is a light emitting diode (LED) or a vertical cavity surface emitting laser (VCSEL).
4. The optical device as recited in claim 1 , further comprising a metal layer coated on the mirror plane.
5. The optical coupling device as recited in claim 1 , wherein the ‘A’ degree of the tilt angle is in the range of approximately within 54.74°±1°.
6. The optical coupling device as recited claim 1 , wherein the ‘B’ degree of the tilt angle ranges from about 56° to about 59°.