Optoelectronic coupling device and method of making

• US 5,309,537 A
• Filed: 04/05/1993
• Issued: 05/03/1994
• Est. Priority Date: 04/05/1993
• Status: Expired due to Term

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Kuo, Shun-Meen, Chun, Christopher K. Y., Lebby, Michael S., Hartman, Davis H.
• Primary Examiner(s): Lee, John D.
• Assistant Examiner(s): PALMER, PHAN T H
• Application Number:
  US08/043,944
• Time in Patent Office: 393 Days
• Field of Search: 385/59, 385/71, 385/88-94, 385/126
• US Class Current: 385/59
• CPC Class Codes: G02B 6/1221 made from organic materials
• CPC Class Codes: G02B 6/30 for use between fibre and thin-film device
• CPC Class Codes: G02B 6/42 Coupling light guides with opto-electronic elements
• CPC Class Codes: G02B 6/423 using guiding surfaces for the alignment
• CPC Class Codes: G02B 6/43 Arrangements comprising a plurality of opto-electronic elements and associated optical interconnections

Abstract

An optical electronic coupling device (100) including a molded waveguide (101, 301, 401) having a plurality of core regions (105) surrounded by a cladding region (103). Cross-sections of the core regions (105) are exposed in an opening (113, 213,313) at one end of the waveguide. An optical cable (102, 303) having a plurality of optical fibers (107, 108, 109, 300) with core regions (123, 124, 125) is inserted into the opening (113, 213, 313), thereby aligning the core regions (123, 124, 125) of the optical fibers (107, 108, 109, 300) with the exposed cross-sections (122) of the core regions (105) of the optical electronic device (100).

Claims

1. An optoelectronic coupling device comprising:

a molded waveguide having a plurality of core regions surrounded by a cladding region, the molded waveguide having a first end and a second end, the first end of the molded waveguide having an opening that exposes at least one core region of the plurality of core regions of the molded waveguide; and

an optical cable having a first end and a second end with the first end of the optical cable having a plurality of individual optical fibers each of which includes a core region, the individual optical fibers connected to the first end of the molded waveguide such that the core region of at least one of the individual fibers is inserted into the opening of the first end and aligned to the at least one core region of the plurality of core regions of the waveguide.

2. An optoelectronic coupling device as claimed in claim 1 further including the second end of the optical cable being an optical connector.

3. An optoelectronic coupling device as claim in claim 1 further including the second end of the molded waveguide having at least one core region of the plurality of core regions exposed and having an optical device mounted thereon with a working portion of the optical device aligned to the exposed one core region of the plurality of core region of the waveguide.

4. An optoelectronic coupling device as claimed in claim 3 wherein the optical device is an optical transmitter.

5. An optoelectronic coupling device as claimed in claim 3 wherein the optical device is an optical receiver.

6. An optoelectronic coupling device as claimed in claim 1 wherein the cladding region includes an upper portion and a lower portion.

7. An optoelectronic module comprising:

an interconnect board having electronic components mounted thereon with interconnecting points;

an optical waveguide having a plurality of core regions surrounded by a cladding region, the optical waveguide having a first end, a second end, and a first surface, the first surface of the waveguide being mounted to the interconnect board securing the waveguide to the interconnect board, the first end having an opening that exposes a cross-section of a core region in the optical waveguide,

an optical device mounted on the second end of the optical waveguide and having a working portion of the optical device aligned to at least one cross-section of the plurality of core regions in the optical waveguide; and

an optical cable having a first end and a second end with the first end of the optical cable having a plurality of individual optical fibers each of which includes a core region, the individual optical fibers connected to the first end of the molded waveguide such that the core region of at least one of the individual fibers is aligned to the exposed cross-section of the core region of the waveguide.

8. An optoelectronic module as claimed in claim 7 further including the second end of the an optical cable being an optical connector.

9. An optoelectronic module as claim in claim 7 further including a wire bond that interconnects the interconnect board to the optical device, thereby electrically connecting the optical device with the interconnect board.

10. An optoelectronic module as claimed in claim 9 wherein the optical device is an optical transmitter.

11. An optoelectronic module as claimed in claim 9 wherein the optical device is an optical receiver.

12. An optoelectronic module as claimed in claim 7 wherein the cladding region includes an upper portion and a lower portion.

13. An optoelectronic coupling device comprising:

a molded optical waveguide having a plurality of core regions surrounded by a cladding region, the waveguide having a first end and a second end, the first end of the molded waveguide having a cavity with a bottom that exposes a cross-sectional surface of a core region of the plurality of core regions, the second end of the waveguide having exposed cross-sections of the plurality of core regions;

an optical device mounted onto the second end of the waveguide having a working portion of the optical device aligned with the exposed cross-section of an individual core region; and

an optical cable having a first end and a second end with the first end of the optical cable having a plurality of individual optical fibers each of which includes a core region, the individual optical fibers inserted into the cavity of the first end of the molded waveguide such that the core region of at least one of the individual optical fibers is aligned to the exposed cross-sectional surface of a core region of the plurality of core regions of the waveguide.

14. An optoelectronic coupling device as claimed in claim 13 wherein the cavity of the molded optical waveguide is proportionally shaped to the optical cable, thereby facilitating connection of the optical cable to the optical waveguide so as to align individual optical fibers to at least one of the core regions of the plurality of core regions of the waveguide.

15. An optoelectronic coupling device as claimed in claim 13 wherein the cavity of the molded optical waveguide is proportionally shaped to the individual optical fibers, thereby facilitating connection of the individual optical fibers to at least one of the core regions of the plurality of core region of the waveguide.

16. An optoelectronic coupling device as claimed in claim 13 further including an optoelectronic device mounted on the second end of the waveguide.

17. An optoelectronic coupling device as claimed in claim 13 wherein the cladding region includes an upper portion and a lower portion.

18. A method for making an optoelectronic device comprising the steps of:

molding an optical waveguide having a plurality of core regions surrounded by a cladding region, the optical waveguide having a first end and a second end, the first end of the optical waveguide having a cavity with a bottom that exposes a cross-sectional surface of a core region of the plurality of core regions;

mounting an optical device on the second end of the optical waveguide and having a working portion of the optical device aligned with the exposed cross-sectional surface of the core region of the plurality of core regions;

providing an optical cable having a first end and a second end with the first end of the optical cable having a plurality of individual optical fibers each of which includes a core region;

attaching the optical cable with the individual optical fibers each having a first end positioned in the cavity and connected to the first end of the molded optical waveguide such that the core region of at least one of the individual optical fibers is aligned to the exposed cross-sectional surface of the core region of the plurality of core regions of the waveguide.

19. A method for making an optoelectronic device as claimed in claim 18 wherein the step of attaching the optical cable includes connecting the individual optical fibers to the first end of the molded optical waveguide by an optical adhesive.