Optical transmission and receiving device for implementing passive alignment of components and method for passively aligning components
An optical device for implementing passive alignment of parts and a method therefor, more particularly an optical device and a method therefor that utilize an alignment reference part arranged on the substrate to passively align an optical element part with a lens-optical fiber connection part. For the passive alignment of parts, connection pillars of an alignment reference part are coupled to substrate holes, one or more light-emitting elements and one or more light-receiving elements are aligned in a row in a particular interval with respect to alignment holes arranged opposite each other in the alignment reference part, a lens-optical fiber connection part is aligned with respect to the alignment holes, and an optical fiber is aligned with the optical alignment point at a surface of a prism forming a portion of the lens-optical fiber connection part.
1. A method for passive alignment of parts on a substrate, the method comprising:
aligning one or more light-emitting elements and one or more light-receiving elements in a row in a particular interval with an alignment point at substrate holes;
aligning a lens-optical fiber connection part with the alignment point at the substrate holes, the lens-optical fiber connection part comprising an optical fiber connector; and
aligning the optical fiber with an optical fiber connector;
wherein the lens-optical fiber connection part comprises alignment pillars for passive coupling with an alignment reference part to implement optical alignment between the one or more light-emitting elements and the optical fiber and wherein an upper surface and a lower surface of the alignment reference part are bent with respect to a body of the alignment reference part to form a substantially rectangular receptacle shape.
2. The method according to claim 1 , wherein the one or more light-emitting elements and the one or more light-receiving elements are mounted parallel to the substrate by way of surface mount technology (SMT).
3. The method according to claim 1 , wherein the optical fiber is part of a multi-channel ribbon of integrated optical fibers.
4. The method according to claim 1 , further comprising:
securing a driver circuit to the substrate.
5. The method according to claim 1 , wherein the lens optical-fiber connection part comprises a focusing lens configured to alter a path of light received from the one or more light-emitting elements.
6. The method according to claim 5 , wherein the lens-optical fiber connection part comprises a prism configured to alter a traveling direction of light, the method further comprising:
installing the focusing lens on a lower surface of the prism in a direction in which the one or more light-emitting elements emits the light.
7. The method according to claim 5 , further comprising:
installing the focusing lens at a position proximate to the one or more light-emitting elements such that light emitted therefrom is received directly by the focusing lens.
8. The method according to claim 6 , wherein the optical fiber is aligned in direct contact with a surface of the prism.
9. The method according to claim 6 , further comprising:
aligning the optical fiber with the alignment point at the surface of a prism using an epoxy adhesive having a similar refractive index between the optical fiber and the surface of the prism.
10. The method according to claim 1 , wherein the optical fiber connector comprises a part of the lens optical-fiber connection part and is configured to secure and connect the optical fiber.
11. The method according to claim 1 , wherein the optical fiber comprises a transmit optical fiber, and the light incident on the transmit optical fiber is less than or equal to a numerical aperture associated therewith.
12. The method according to claim 1 , further comprising:
coupling an optical fiber pin to an end of the lens-optical fiber connection part for securing the optical fiber.
13. The method according to claim 12 , wherein the optical fiber pin includes substantially V-shaped grooves for securing the optical fiber.
14. The method according to claim 1 , further comprising enclosing at least a portion of the one or more light-emitting elements with a metal case.