Optical connection component

Patent metadata

Field	Value
Publication number	US-2018136409-A1
Application number	US-201815868249-A
Country	US
Kind code	A1
Filing date	Jan 11, 2018
Priority date	Aug 13, 2015
Publication date	May 17, 2018
Grant date	—

Abstract

The present embodiment achieves effective height reduction of an entire optical connection component constituted by a bent optical fiber and a fiber fixing component. The fiber fixing component includes a first portion and a second portion which constitute the holding portion in a state of being arranged in a manner interposing an installation plane in order to hold one of non-bent sections positioned at both ends of a bent portion in a state where the one of non-bent sections is arranged on the installation plane. Total lengths of the first portion and the second portion are different from each other, and effective height reduction of the entire optical connection component can be achieved by arranging the bent portion in a stepped portion formed by the total length difference.

First claim

1 . An optical connection component comprising:
a bent optical fiber constituted by: a glass portion; and a resin coating provided on an outer peripheral surface of the glass portion, the bent optical fiber having an exposed section where a part of the resin coating located on one end portion side of the bent optical fiber is removed and the glass portion is exposed, the exposed section includes a bent portion, a first non-bent section, and a second non-bent section, the bent portion being bent in a state where substantially no bending stress remains, the first non-bent section locating at a distal end of the bent optical fiber, and the first non-bent section and the second non-bent section interposing the bent portion therebetween; and a fiber fixing component having a holding portion housing the first non-bent section in a state where the first non-bent section is arranged on an installation plane while exposing the bent portion, the first non-bent section extending to a position apart from an end surface of the glass portion, wherein the fiber fixing component includes a first portion and a second portion which constitute the holding portion in a state of being arranged in a manner interposing the installation plane, a length of the first portion along a longitudinal direction of the holding portion is longer than a length of the second portion along the longitudinal direction of the holding portion, and the second non-bent section is arranged in a space where the second portion is positioned with respect to the installation plane.

2 . The optical connection component according to claim 1 , wherein
the first portion and the second portion are arranged such that a part of a holding surface of the first portion to hold the first non-bent section directly faces the space where the second non-bent section is arranged.

3 . The optical connection component according to claim 1 , wherein
the first portion includes a V-groove substrate having a V-groove to define a position of the first non-bent section on the installation plane, and the second portion includes a lid to define, in cooperation with the V-groove of the V-groove substrate, a position of the first non-bent section along a direction orthogonal to the installation plane.

4 . The optical connection component according to claim 3 , wherein
the lid has a corner portion defined by: a first lid surface facing a surface of the V-groove substrate provided with the V-groove; and a second lid surface which is continued from the first lid surface and faces the space side where the exposed section is positioned, the corner portion having a curvature larger than the curvature of the bent portion on a plane including the first non-bent section and orthogonal to the installation plane.

5 . The optical connection component according to claim 4 , wherein
an interval located in the exposed section and extending along the installation plane from a position exposed from the holding portion of the fiber fixing component to the bent portion is 50 [μm] or more and 1 [mm] or less.

6 . The optical connection component according to claim 4 , wherein
the corner portion has a curvature of 100 [l/mm] or less.

7 . The optical connection component according to claim 1 , wherein
at least a part of the fiber fixing component is made of a material transmitting ultraviolet light.

8 . The optical connection component according to claim 1 , wherein
the glass portion includes a single mode optical fiber containing SiO 2 glass as a main component and guaranteeing single mode transmission at 1.31 μm, the single mode optical fiber includes a core, a first cladding surrounding the core, a second cladding surrounding the first cladding, and a third cladding surrounding the second cladding, a relative refractive index difference Δ 1 of the core relative to the third cladding, a relative refractive index difference Δ 2 of the first cladding relative to the third cladding, and a relative refractive index difference Δ 3 of the second cladding relative to the third cladding satisfy relations of:
Δ1>Δ2>Δ3 and Δ3<−0.5[%], and

a product V 3 of the relative refractive index difference Δ 3 and a cross-sectional area S of the second cladding is less than −200 [%·μm 2 ].

9 . The optical connection component according to claim 1 , wherein
an interval extending along the installation plane to the second non-bent section from a side surface farthest from the second non-bent section out of side surfaces of the second portion is 5 [mm] or less on a plane including the first non-bent section and orthogonal to the installation plane, the bent portion has a curvature of 0.4 [l/mm] or more, and an excessive loss at the bent portion defined by a sum of a bending loss and a leakage loss is 0.5 [dB] or less at a use wavelength.

10 . The optical connection component according to claim 1 , wherein
a total length of the first non-bent section housed in the holding portion is 0.3 mm or more and 1.5 mm or less.

11 . The optical connection component according to claim 1 , further comprising a potting resin covering a section located in the exposed section and excluding the first non-bent section housed in the holding portion.

12 . The optical connection component according to claim 11 , wherein
the potting resin has a minimum thickness of 60 μm or more.

13 . The optical connection component according to claim 11 , wherein
the potting resin has a contour line defining an outer shape thereof, the contour line including a curved portion having a curvature of 5/3 [l/mm] or less on a plane including the first non-bent section and orthogonal to the installation plane.

14 . The optical connection component according to claim 5 , wherein
the corner portion has a curvature of 100 [l/mm] or less.

15 . The optical connection component according to claim 2 , wherein
the first portion includes a V-groove substrate having a V-groove to define a position of the first non-bent section on the installation plane, and the second portion includes a lid to define, in cooperation with the V-groove of the V-groove substrate, a position of the first non-bent section along a direction orthogonal to the installation plane.

16 . The optical connection component according to claim 15 , wherein
the lid has a corner portion defined by: a first lid surface facing a surface of the V-groove substrate provided with the V-groove; and a second lid surface which is continued from the first lid surface and faces the space side where the exposed section is positioned, the corner portion having a curvature larger than the curvature of the bent portion on a plane including the first non-bent section and orthogonal to the installation plane.

17 . The optical connection component according to claim 16 , wherein
an interval located in the exposed section and extending along the installation plane from a position exposed from the holding portion of the fiber fixing component to the bent portion is 50 [μm] or more and 1 [mm] or less.

18 . The optical connection component according to claim 16 , wherein
the corner portion has a curvature of 100 [l/mm] or less.

19 . The optical connection component according to claim 17 , wherein
the corner portion has a curvature of 100 [l/mm] or less.

20 . The optical connection component according to claim 12 , wherein
the potting resin has a contour line defining an outer shape thereof, the contour line including a curved portion having a curvature of 5/3 [

Assignees

• Sumitomo Electric Industries

Inventors

• Mitose Yuuichi
• Nakanishi Tetsuya
• Sasaki Takashi
• Matsushita Naoki

Classifications

• G02B6/4403

  with ribbon structure (G02B6/4429, G02B6/4439, G02B6/4479 take precedence) · CPC title

• G02B6/02395

  Glass optical fibre with a protective coating, e.g. two layer polymer coating deposited directly on a silica cladding surface during fibre manufacture (G02B6/02052, G02B6/02057, G02B6/024, G02B6/032, G02B6/105, G02B6/14 take precedence; coating on fibre gratings G02B6/02104; multilayer core or cladding G02B6/036; reinforcing splice joints G02B6/2558; optical cables, i.e. comprising protective structures external to the protective coating such as a jacket or plural coated optical fibres G02B6/44; coating of glass to obtain optical fibres C03C25/104) · CPC title

• G02B6/4285

  Optical modules characterised by a connectorised pigtail · CPC title

• G02B6/0365

  arranged - - + · CPC title

• G02B6/4249

  comprising arrays of active devices and fibres · CPC title