FERRULE AND FERRULE WITH OPTICAL FIBER

• US 20110317959A1
• Filed: 09/09/2010
• Published: 12/29/2011
• Est. Priority Date: 06/29/2010
• Status: Active Grant

• Current Assignee: Fujikura Limited
• Original Assignee: Fujikura Limited
• Inventors: OHTA, Tatsuya, NISHIMURA, Akito, KOBAYASHI, Terutake, FUJIWARA, Kunihiko
• Granted Patent: US 9,063,304 B2
• Time in Patent Office: Days
• US Class Current: 385/38
• CPC Class Codes: G02B 6/3636 the mechanical coupling means being grooves G02B6/3652 takes precedence
• CPC Class Codes: G02B 6/3861 Adhesive bonding adhesives in general C09J
• CPC Class Codes: G02B 6/4206 Optical features G02B6/4207, G02B6/421 take 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 6/4284 of optical modules with disconnectable electrical connectors latching arms for electrical connectors H01R13/627

Abstract

Provided is a ferrule which includes a positioning mechanism configured to position an optical fiber having a predetermined outer diameter, and a recess configured for an adhesive to be disposed therein and having a first inner wall from which a front end of the optical fiber portion positioned by the positioning mechanism is protrudable, and a second inner wall opposite to the first inner wall. A distance between the first inner wall and the second inner wall is less than or equal to four times the outer diameter of the optical fiber.

Claims

1. A ferrule for optically connecting the optical fiber to an optical part, the ferrule comprising:

a positioning mechanism configured to position an intermediate portion of the optical fiber having a predetermined outer diameter; and

a recess configured for an adhesive to be disposed therein and comprising a first inner wall from which a front end of the optical fiber positioned by the positioning mechanism is protrudable, and a second inner wall opposite to the first inner wall,

wherein a distance between the first inner wall and the second inner wall is less than or equal to four times the outer diameter of the optical fiber.

2. The ferrule according to claim 1, wherein the ferrule is formed of resin that is transparent to a wavelength of light transmitted through the optical fiber.

3. The ferrule according to claim 1, wherein the recess comprises an adhesive application slot with an opening larger than the distance between the first inner wall and the second inner wall.

4. The ferrule according to claim 2, wherein at least one of the first inner wall and the second inner wall of the adhesive application slot comprises an inclined surface.

5. The ferrule according to claim 1, further comprising a reflecting portion reflecting light on an optical path between the front end of the optical fiber positioned by the positioning mechanism and the optical part.

6. An optical connector comprising:

an optical fiber; and

a ferrule comprising;

a positioning mechanism which positions at least an intermediate portion of the optical fiber;

a recess comprising a first inner wall from which a front end of the optical fiber protrudes, and a second inner wall opposite to the first inner wall; and

an adhesive disposed in the recess and a surrounding portion of the optical fiber protruding from the first inner wall,

wherein a distance between the first inner wall and the second inner wall is less than or equal to four times the outer diameter of the optical fiber; and

wherein the front end of the optical fiber contacts the second inner wall.