OPTICAL WIRING MODULE, OPTICAL TRANSCEIVER, AND OPTICAL COUPLING METHOD

• US 20180031786A1
• Filed: 07/07/2017
• Published: 02/01/2018
• Est. Priority Date: 07/28/2016
• Status: Active Grant

• Current Assignee: Fujitsu Limited, Photonics Electronics Technology Research Association
• Original Assignee: Fujitsu Limited, Photonics Electronics Technology Research Association
• Inventors: Aoki, Tsuyoshi, Sekiguchi, Shigeaki
• Granted Patent: US 10,001,607 B2
• Time in Patent Office: Days
• CPC Class Codes: G02B 6/34 utilising prism or grating G02B6/293 takes precedence
• CPC Class Codes: G02B 6/4214 the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device G02B6/4246 takes precedence
• CPC Class Codes: G02B 6/423 using guiding surfaces for the alignment
• CPC Class Codes: G02B 6/4246 Bidirectionally operating package structures
• CPC Class Codes: G02B 6/4249 comprising arrays of active devices and fibres
• CPC Class Codes: G02B 6/4253 by embedding housing components in an adhesive or a polymer material G02B6/4212 takes precedence
• CPC Class Codes: G02B 6/4256 Details of housings
• CPC Class Codes: G02B 6/4292 the light guide being disconnectable from the opto-electronic element, e.g. mutually self aligning arrangements

Abstract

An optical wiring module includes an optical wiring substrate on which an optical waveguide having a light input/output part is formed, and a fiber holder mounted on the optical wiring substrate, the fiber holder being configured to hold an optical fiber. The optical wiring substrate includes a hydrophobic film having an opening at a position corresponding to the light input/output part and a first adhesive layer disposed within the opening, and the optical fiber is optically coupled to the light input/output part via the first adhesive layer.

Claims

1. An optical wiring module comprising:

an optical wiring substrate on which an optical waveguide having a light input/output part is formed; and

a fiber holder mounted on the optical wiring substrate, the fiber holder being configured to hold an optical fiber, wherein

the optical wiring substrate includes a hydrophobic film having an opening at a position corresponding to the light input/output part and a first adhesive layer disposed within the opening, and

the optical fiber is optically coupled to the light input/output part via the first adhesive layer.

2. The optical wiring module as claimed in claim 1, wherein

the optical wiring substrate has a hydrophilic surface, and

the first adhesive layer is hydrophilic.

3. The optical wiring module as claimed in claim 1, wherein

the fiber holder includes a fiber guide configured to hold the optical fiber at an angle that is perpendicular to or approximately perpendicular to the optical wiring substrate, and a flared space communicating with the fiber guide on a connection surface side with the optical wiring substrate, wherein the first adhesive layer is accommodated within the flared space.

4. The optical wiring module as claimed in claim 3, further comprising:

a second adhesive layer disposed within the flared space, the second adhesive layer being configured to fix a connection portion between the optical fiber and the first adhesive layer.

5. The optical wiring module as claimed in claim 4, wherein

the fiber holder includes an adhesive injection channel that communicates with the fiber guide or the flared space.

6. The optical wiring module as claimed in claim 1, wherein

a tip of the optical fiber is surface-bonded to a surface of the first adhesive layer.

7. The optical wiring module as claimed in claim 3, wherein

the optical fiber is fixed at a fiber insertion end of the fiber holder, and

a gap is formed between an inner wall of the fiber guide and an outer periphery of the optical fiber.

8. The optical wiring module as claimed in claim 1, wherein

at least at a fiber tip portion and a portion close to the fiber tip portion of an outer peripheral surface of the optical fiber is covered with a hydrophobic film.

9. The optical wiring module as claimed in claim 1, wherein

the fiber holder includes a projection or a wall to be fitted to the optical wiring substrate.

10. An optical transceiver comprising:

the optical wiring module as claimed in claim 1; and

an electric component connected to the optical wiring module.

11. An electronic apparatus comprising:

an electronic component; and

the optical transceiver as claimed in claim 10, wherein the optical transceiver is disposed on a package substrate in the vicinity of the electronic component.

12. An optical coupling method comprising:

forming a hydrophobic film on a substrate on which an optical waveguide having a light input/output part is formed, the hydrophobic film having an opening at a position corresponding to the light input/output part; and

disposing an adhesive layer within the opening; and

bringing a tip end face of an optical fiber held with a predetermined gap in a fiber guide into contact with the adhesive layer so as to self-align a core of the optical fiber and the light input/output part using surface tension of the adhesive layer.