WO1999057588A1 - Procede d'epissurage de fibres de verre - Google Patents

Procede d'epissurage de fibres de verre Download PDF

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Publication number
WO1999057588A1
WO1999057588A1 PCT/DE1999/001197 DE9901197W WO9957588A1 WO 1999057588 A1 WO1999057588 A1 WO 1999057588A1 DE 9901197 W DE9901197 W DE 9901197W WO 9957588 A1 WO9957588 A1 WO 9957588A1
Authority
WO
WIPO (PCT)
Prior art keywords
glass fibers
end faces
rotation
angle
fiber
Prior art date
Application number
PCT/DE1999/001197
Other languages
German (de)
English (en)
Inventor
Bert Zamzow
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO1999057588A1 publication Critical patent/WO1999057588A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/255—Splicing of light guides, e.g. by fusion or bonding
    • G02B6/2555—Alignment or adjustment devices for aligning prior to splicing
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/255—Splicing of light guides, e.g. by fusion or bonding
    • G02B6/2551—Splicing of light guides, e.g. by fusion or bonding using thermal methods, e.g. fusion welding by arc discharge, laser beam, plasma torch

Definitions

  • the invention relates to a method for splicing two glass fibers according to the preamble of patent claim 1.
  • the attenuation caused by the splice point depends both on the exact alignment of the two fiber cores and on the inclination and orientation of the fiber end faces. If, before splicing, the fiber end faces are oriented towards each other in such a way that the glass fibers touch each other along a surface line, but are at a considerable distance from one another along the diametrically opposite surface area, then there is a glass flow due to the material deficit in the area of the gap, which may also captured the fiber cores and bent them. The splice produced in this way then has considerable damping.
  • DE-33 29 293 C2 proposes to rotate one of the glass fibers to be spliced about its longitudinal axis in order to reduce the width of the gap between the fiber end faces.
  • the ends of the glass fibers in the area of the splice point are observed with the aid of an optical unit and the gap is minimized by rotating one of the glass fibers.
  • this process is very time consuming and often does not lead to an optimal result.
  • the invention has for its object to provide a method of the type mentioned, with which the angle of rotation leading to a minimal gap width can be determined very quickly and in an optimal manner.
  • the angle of rotation leading to a minimal distance between the fiber end faces is determined by projecting the fiber end faces onto two planes, which include an angle and each extend parallel to the common longitudinal axis of the glass fibers. With the aid of optical measuring devices, the angles of the two glass fiber end faces to the common fiber longitudinal axis are then measured and the optimal angle of rotation is calculated therefrom.
  • One of the glass fibers or both glass fibers can be rotated relative to one another about their longitudinal axis either by hand or with the aid of mechanical rotating devices. After their optimal alignment, the glass fibers are then spliced together in a known manner.
  • FIG. 1 shows the opposite ends of two glass fibers to be spliced together
  • FIG. 2 shows the two glass fibers and their projections on two planes perpendicular to one another
  • FIG. 3 shows the spatial position of the two planes and the coordinate systems assigned to them
  • FIG. 4 shows the projection of the. Ends of the glass fibers in the xl-z
  • FIG. 5 the projections of the ends of the glass fibers in the x2-z plane and FIG. 6 the schematic structure of a device for
  • Fig. 1 two glass fibers FL / FR with their respective fiber cores KL / KR are shown in longitudinal section, the end faces EL / ER of the glass fibers KL / KR with the angles ⁇ and ⁇ R include the two straight lines GL and GR, which are perpendicular to the common fiber longitudinal axis z.
  • the opposite end surfaces EL / ER define a gap SP, the opening angle of which is denoted by ⁇ .
  • the glass fibers KL / KR are spliced together in this position, there is either no complete fusion of the end faces EL / ER or there is a glass flow directed upwards in the drawing, which possibly covers the fiber cores KL / KR and these bends.
  • the splice connection produced has a higher damping than in the ideal case, where the two end surfaces EL / ER are oriented perpendicular to the longitudinal fiber axis z before the splicing.
  • the projection planes E1 / E2 can of course also include an angle ⁇ deviating from 90 °, the intersecting line of the planes E1 / E2 coinciding with the z axis, that is to say with the longitudinal axes of the fibers. While the xl and z axes span the plane El, the x2 and z axes define the plane E2.
  • FIGS. 4 and 5 the levels E1 and E2 and the fiber ends projected / imaged thereon are shown schematically.
  • the four angles ⁇ i , ⁇ R , ⁇ 2L and ⁇ 2R can be determined from the projections of the two fiber ends into the planes E1 / E2. In this case, a positive angle is defined in each case counterclockwise from the xl or x2 axis.
  • the axially aligned glass fibers to be connected and each clamped in the rotating device 10/11 are again identified with FL and FR.
  • the rotating devices 10/11 shown only schematically, are standard in many conventional splicers. As mentioned above, a single rotating device 10/11 is sufficient to carry out the method according to the invention.
  • the end regions of the glass fibers FL / FR illuminated by the lighting devices 13/14 are imaged by means of optical systems 20/21 on the camera or recording units 15/16 arranged opposite the respective lighting device 13/14. So-called CCDs, whose radiation-sensitive areas define the projection planes E1 / E2, are particularly suitable as recording units 15/16.
  • the output signals of the recording units 15/16 are evaluated in a video evaluation unit 17, which transfers the calculated angle of rotation ⁇ to the central control unit 19.
  • the control unit 19 for example, causes the rotating device 11 to rotate the glass fiber FR about its longitudinal axis z and thus optimally with respect to the
  • the device also contains positioning units 22/23/24 for displacing the glass fibers FL / FR in the directions indicated by the arrows.
  • the thermal welding of the glass fibers FL / FR is carried out in a known manner with the aid of the pair of electrodes 26/27 controlled by the unit 25 using the example in FIG telcom report, March 1987, pages 240-246.
  • the method according to the invention can also be carried out manually.
  • the device then only contains the illumination and imaging systems, the components required for axial alignment and thermal splicing, and the video evaluation unit, the latter calculating and displaying the optimal angle of rotation ⁇ .
  • the operator of the device must then rotate one of the glass fibers by the predetermined angle until the glass fibers are optimally aligned.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Coupling Of Light Guides (AREA)

Abstract

Selon l'invention, avant l'épissurage de deux fibres de verre (ML, FR), leurs faces d'extrémité (EL, ER) obliques sont rapprochées l'une de l'autre et, par rotation d'une des deux fibres de verre (FL, FR), alignées autour de l'axe longitudinal (z) commun de telle sorte que l'espace séparant les deux fibres de verre (FL, FR) présente une largeur minimale. On définit l'angle de rotation optimal (ζ) à partir de quatre angles (α1L, α1R, α2L, α2R) que forment les premières droites définies par projection des faces d'extrémité (EL, ER) des fibres sur deux plans (E1, E2), premières droites qui se trouvent respectivement sur la face d'extrémité (EL, ER) de la fibre correspondante, respectivement avec des secondes droites orientées perpendiculairement à l'axe longitudinal (z).
PCT/DE1999/001197 1998-05-05 1999-04-20 Procede d'epissurage de fibres de verre WO1999057588A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19820028 1998-05-05
DE19820028.5 1998-05-05

Publications (1)

Publication Number Publication Date
WO1999057588A1 true WO1999057588A1 (fr) 1999-11-11

Family

ID=7866725

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1999/001197 WO1999057588A1 (fr) 1998-05-05 1999-04-20 Procede d'epissurage de fibres de verre

Country Status (1)

Country Link
WO (1) WO1999057588A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4832438A (en) * 1983-08-12 1989-05-23 Siemens Aktiengesellschaft Installation for the alignment of an optical waveguide for splicing purposes
JPH08327851A (ja) * 1995-05-31 1996-12-13 Fujikura Ltd 光ファイバの融着接続方法
EP0813081A1 (fr) * 1996-06-12 1997-12-17 Siemens Aktiengesellschaft Procédé pour déterminer l'angle d'inclination d'au moins une fibre optique et dispositif pour la mise en oeuvre du procédé

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4832438A (en) * 1983-08-12 1989-05-23 Siemens Aktiengesellschaft Installation for the alignment of an optical waveguide for splicing purposes
JPH08327851A (ja) * 1995-05-31 1996-12-13 Fujikura Ltd 光ファイバの融着接続方法
EP0813081A1 (fr) * 1996-06-12 1997-12-17 Siemens Aktiengesellschaft Procédé pour déterminer l'angle d'inclination d'au moins une fibre optique et dispositif pour la mise en oeuvre du procédé

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"AUTOMATIC POSITIONING AND ALIGNMENT EQUIPMENT FOR OPTICAL FIBRES", RESEARCH DISCLOSURE, no. 216, 1 April 1982 (1982-04-01), pages 131/132, XP002037997, ISSN: 0374-4353 *
PATENT ABSTRACTS OF JAPAN vol. 097, no. 004 30 April 1997 (1997-04-30) *

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