OPTICAL CONNECTOR HAVING OPTICAL FIBER

• US 20090257718A1
• Filed: 02/20/2009
• Published: 10/15/2009
• Est. Priority Date: 02/25/2008
• Status: Active Grant

• Current Assignee: Fujikura Limited
• Original Assignee: Fujikura Limited
• Inventors: NISHIMURA, Akito, Hayashi, Yukio, Fujiwara, Kunihiko, Ishikawa, Takaaki
• Granted Patent: US 7,850,372 B2
• Time in Patent Office: Days
• US Class Current: 385/80
• CPC Class Codes: G02B 6/3644 the coupling means being through-holes or wall apertures
• CPC Class Codes: G02B 6/3652 the additional structures being prepositioning mounting areas, allowing only movement in one dimension, e.g. grooves, trenches or vias in the microbench surface, i.e. self aligning supporting carriers
• CPC Class Codes: G02B 6/3664 2D cross sectional arrangements of the fibres
• CPC Class Codes: G02B 6/368 with pitch conversion between input and output plane, e.g. for increasing packing density
• CPC Class Codes: G02B 6/3696 by moulding, e.g. injection moulding, casting, embossing, stamping, stenciling, printing, or with metallic mould insert manufacturing using LIGA or MIGA techniques shaping the mould surface by machining B29C33/38; moulding techniques B29C39/00, B29C43/00, B29C45/00, B29C48/00, B29C59/00; stamping, printing or embossing techniques B81C1/00444; surface micromachining using LIGA B81C2201/032
• CPC Class Codes: G02B 6/3821 with axial spring biasing or loading means G02B6/3847 takes precedence
• CPC Class Codes: G02B 6/3885 Multicore or multichannel optical connectors, i.e. one single ferrule containing more than one fibre, e.g. ribbon type optical ribbon cable G02B6/4403, G02B6/448

Abstract

In an optical connector with optical fibers in which silica glass optical fibers with resin coating layers remaining attached are connected in optical fiber openings of a ferrule made from resin, at least a part of the resin coating layer of the optical fiber is glued to an inner face of the optical fiber opening, an outer diameter of the resin coating layer of the optical fiber is less than or equal to 125 μm, and the Young'"'"'s modulus of the resin coating layer is less than the Young'"'"'s modulus of the ferrule, and the Young'"'"'s modulus of the resin coating layer is 1500 to 10000 MPa.

Claims

1. An optical connector with optical fibers in which silica glass optical fibers with resin coating layers remaining attached are connected in optical fiber openings of a ferrule made from resin, wherein:

at least a part of said resin coating layer of said optical fiber is glued to an inner face of said optical fiber opening;

an outer diameter of said resin coating layer of said optical fiber is less than or equal to 125 μ

m; and

the Young'"'"'s modulus of said resin coating layer is less than the Young'"'"'s modulus of the ferrule, and the Young'"'"'s modulus of said resin coating layer is 1500 to 10000 MPa.

2. The optical connector with optical fibers according to claim 1, wherein

the Young'"'"'s modulus of a thickest layer forming said resin coating layer is less than the Young'"'"'s modulus of the ferrule, and the Young'"'"'s modulus of said thickest layer is 1500 to 10000 MPa.

3. The optical connector with optical fibers according to claim 2, wherein

the Young'"'"'s modulus of said thickest layer is 1500 MPa to 3500 MPa.

4. The optical connector with optical fibers according to claim 1, wherein:

said optical fiber has said resin coating layer on an outer periphery of a cladding layer with an outer diameter of 80 μ

m;

said resin coating layer includes a primary coating layer with an outer diameter of 110 μ

m and a colored resin layer with an outer diameter of 125 μ

m; and

a diameter of the optical fiber opening of said ferrule is 126 to 129 μ

m.

5. The optical connector with optical fibers according to claim 1, wherein

two alignment member insertion holes, into which alignment members of another optical connector of a mating part are inserted, are formed in a connecting end face of said ferrule, and the alignment member insertion holes are formed on two sides of said plurality of optical fiber openings.

6. The optical connector with optical fibers according to claim 1, wherein

the ends of said optical fibers are PC ground such that they protrude from the connecting end face of said ferrule.

7. The optical connector with optical fibers according to claim 1, wherein:

said optical fibers are inserted into a tubular protective member to be guided into the ferrule, and fastened by adhesive filling an internal cavity of said ferrule; and

wirings of the optical fibers in said ferrule have;

a converging section converging inside said protective member;

a central section which projects from said protective member and extends toward said optical fiber openings while expanding a distance between them; and

a mounting section which extends toward said optical fiber openings and has an almost uniform distance therebetween.

8. An optical connector with optical fibers in which silica glass optical fibers are sandwiched and fastened by adhesive between an array substrate having a plurality of optical fiber introducing grooves and a cap section located on the array substrate, wherein:

parts of said optical fibers, which are placed in said optical fiber introducing grooves, have resin coating layers remaining attached;

an outer diameter of said resin coating layers of said optical fibers is less than or equal to 125 μ

m; and

the Young'"'"'s modulus of said resin coating layers is less than the Young'"'"'s modulus of said array substrate and the cap, and the Young'"'"'s modulus of said resin coating layers is 1500 to 10000 MPa.