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WO1979000099A1 - Device and method for fixing the end of an optical fibre - Google Patents

Device and method for fixing the end of an optical fibre Download PDF

Info

Publication number
WO1979000099A1
WO1979000099A1 PCT/SE1978/000032 SE7800032W WO7900099A1 WO 1979000099 A1 WO1979000099 A1 WO 1979000099A1 SE 7800032 W SE7800032 W SE 7800032W WO 7900099 A1 WO7900099 A1 WO 7900099A1
Authority
WO
WIPO (PCT)
Prior art keywords
bushing
sleeve
flange
optical fibre
mounting base
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/SE1978/000032
Other languages
French (fr)
Inventor
G Endersz
J Gstadius
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Priority to DE19782856986 priority Critical patent/DE2856986A1/en
Priority to BR7808740A priority patent/BR7808740A/en
Publication of WO1979000099A1 publication Critical patent/WO1979000099A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4219—Mechanical fixtures for holding or positioning the elements relative to each other in the couplings; Alignment methods for the elements, e.g. measuring or observing methods especially used therefor
    • G02B6/4236—Fixing or mounting methods of the aligned elements
    • G02B6/4239—Adhesive bonding; Encapsulation with polymer material
    • 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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4219—Mechanical fixtures for holding or positioning the elements relative to each other in the couplings; Alignment methods for the elements, e.g. measuring or observing methods especially used therefor
    • G02B6/422—Active alignment, i.e. moving the elements in response to the detected degree of coupling or position of the elements
    • G02B6/4226—Positioning means for moving the elements into alignment, e.g. alignment screws, deformation of the mount

Definitions

  • the present invention relates to an arrangement for fixing the end of an optical fibre to an optically active element, for example a light source.
  • a fibre In an optical fibre system, a fibre often will be coupled to a fibre or to ⁇ n opto-electronic converter, for example a laser or a light-emitting diode.
  • the radiation diagrams from these converters are often such that the adjustment of the fibre end in front of the light-emitting surface is very critical. It is desirable that the end of the glass fibre is fixed with " a . . - tolerance of a few micrometers and that the long range stability of the fixation is within similar limits.
  • the invention relates to a procedure for fixing an optical fibre relative to an optically active element where the fixation is made with good precision - and good stability.
  • 11 designates an U-shaped assembly base of which one bra 12 carries an opto-electronic element 13, for example a semi-conductor laser.
  • the light beam of the laser 13 will be coupled to an optical fibr the end of which is quite close to the laser.
  • the optical fibre 14 is fix tn a sleeve 15, which can be a capillary tube.
  • the sleeve 15 is in its t slidably arranged in a central hole 16 of a bushing 17 provided with a flange 18,
  • the bushing 17 is placed in a hole 19 of the other branch 20 the assembly base 11.
  • the hole 19 is bigger than the outer diameter of t bushing so that the latter can be slid in the directions which on the fi are designated by X and Y.
  • the flange 18 bears against the surface 21 fo X- and Y-positions of the bushing 17.
  • the sleeve 16 is arranged to be able to slide in the axial direction in central hole of the bushing, which in the Figures is designated Z.
  • the mounting block 11 is fixed on a slide which is arranged to slide in the Z-direction in a frame 26.
  • An adjustme screw 27 is situated for precision adjustment of the slide.
  • the sleeve 1 is fixed in a chuck 28, which is flexibly arranged in the frame 26.
  • the postion of the chuck can be adjusted in the X- Y-directions by means of fine adjustment screws 31 and 32.
  • the chuck is so designed t it permits a. certain angular movement between the sleeve 15 and the chuc so that a possible angular deviation between the flange and the said sur may be compensated for.
  • the end of the optical fibre 1 is adjusted by means of the adjustment screws 27, 30, 31 until the best possible tranmission is received, which can be controlled through measuri the transferred power.
  • the flange 18 is pressed against the surface 21 and the adjustment in the Z-direction is made by sliding the sleeve 15 in the bushing 17 when the slide 25 is slid relati to the frame 26.
  • the adjustment in the Z-direction is the least criti the fibre is first fixed in that direction. It is done by injecting a dr of a highly fluid, quick setting glue, preferably of the cyanoacrylate t in the hole 22.
  • the glue spreads quickly in the gap between the sleeve and the bushing and sets in a few minutes to a permanent unit. Because of the close fit, the glue joint is very thin, so possible deformations of the glue during the curing have no influence on the position of the fibre.
  • the X- and Y-adjustments are controlled, after which the ring-shaped gap between the flange 18 and the surface 21 is filled with the highly fluid curing glue.
  • surfaces of the flange 18 and the branch 20 facing each other, as well as the surfaces of the sleeve 15 and the bushing 17, are provided with suitable grooves. These grooves - can be machining marks, for example after turning or milling.
  • the mounting base can be released from the slide 25 and " - the chuck 28 from the ' sleeve 15 and the ' coupling is ready for use.
  • the arrangement according to the invention may not only be used for fixing the end of an optical fibre relative to a light source but also relative to some other optically active element.
  • optically active element examples include light detectors, lenses,, filters and other optical fibres.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

An optical fibre (14) is optically coupled to an optically active element (13), for example a light source. In order to achieve optimum coupling, the end portion of the fibre (14) is carefully adjusted in relation to said element (13) in three dimensions. The end of the fibre is provided with a sleeve (15) slidably mounted in a bushing (17). The bushing is provided with a flange (18) which is adjustably pressed against a surface (12) on a mounting base (11) which is perpendicular to the axis of the sleeve (15). The mounting base (11) also carries the optically active element (13) near the end of the fibre (14). After the sleeve (15) and the bushing (17) respectively are adjusted so that maximum coupling is obtained between the fibre and the optical element the sleeve (15), bushing (17) and mounting base (11) are fixed together by introducing a highly fluid, quick-setting glue, preferably a cyanoacrylate, between the sleeve (15) and the bushing (17) and between the bushing (17) and the mounting base (11).

Description

DEVICE AND METHOD FOR FIXING THE END OF AN OPTICAL FIBRE
FIELD OF THE INVENTION
The present invention relates to an arrangement for fixing the end of an optical fibre to an optically active element, for example a light source.
DESCRIPTION OF PRIOR ART
In an optical fibre system, a fibre often will be coupled to a fibre or to εn opto-electronic converter, for example a laser or a light-emitting diode. The radiation diagrams from these converters are often such that the adjustment of the fibre end in front of the light-emitting surface is very critical. It is desirable that the end of the glass fibre is fixed with" a .. - tolerance of a few micrometers and that the long range stability of the fixation is within similar limits.
The ordinary method of fixing an optical fibre relative to a radiation " source is to cast it in an appropriate substance, for example an epoxy plastic. This type of fixation takes long time because of the curing and it has shown that the shrinking of the epoxy plastic during the curing is so great that the precision is jeopardized. Other ways of fixing fibres are to use different types of mechanical joints but these are often difficult to adjust.
SUMMARY OF THE INVENTION
The invention relates to a procedure for fixing an optical fibre relative to an optically active element where the fixation is made with good precision - and good stability. The characteristics of the invention appears from the appended claims.
BRIEF DESCRIPTION OF THE DRAWING
The invention will be described more closely with reference to the accompany¬ ing drawing where Figure 1 shows a side view partly in section and Figure 2 shows a plan view of an arrangement according to the invention together with an adjusting arrangement. PREFERRED EMBODIMENT
In the Figures, 11 designates an U-shaped assembly base of which one bra 12 carries an opto-electronic element 13, for example a semi-conductor laser. The light beam of the laser 13 will be coupled to an optical fibr the end of which is quite close to the laser. The optical fibre 14 is fix tn a sleeve 15, which can be a capillary tube. The sleeve 15 is in its t slidably arranged in a central hole 16 of a bushing 17 provided with a flange 18, The bushing 17 is placed in a hole 19 of the other branch 20 the assembly base 11. The hole 19 is bigger than the outer diameter of t bushing so that the latter can be slid in the directions which on the fi are designated by X and Y. The flange 18 bears against the surface 21 fo X- and Y-positions of the bushing 17. In the bushing 17 there is a hole The sleeve 16 is arranged to be able to slide in the axial direction in central hole of the bushing, which in the Figures is designated Z.
■ When mounting -the arrangement, the mounting block 11 is fixed on a slide which is arranged to slide in the Z-direction in a frame 26. An adjustme screw 27 is situated for precision adjustment of the slide. The sleeve 1 is fixed in a chuck 28, which is flexibly arranged in the frame 26. The postion of the chuck can be adjusted in the X- Y-directions by means of fine adjustment screws 31 and 32. Between the chuck and the flange 18 there is a spring .'arrangement 32 which forces the flange 18 against the surface 21. In order to provide close contact between the flange 18 and surface 21 along their whole contact surface, the chuck is so designed t it permits a. certain angular movement between the sleeve 15 and the chuc so that a possible angular deviation between the flange and the said sur may be compensated for.
- With the arrangement shown in the figures, the end of the optical fibre 1 is adjusted by means of the adjustment screws 27, 30, 31 until the best possible tranmission is received, which can be controlled through measuri the transferred power. During the adjustment, the flange 18 is pressed against the surface 21 and the adjustment in the Z-direction is made by sliding the sleeve 15 in the bushing 17 when the slide 25 is slid relati to the frame 26. As the adjustment in the Z-direction is the least criti the fibre is first fixed in that direction. It is done by injecting a dr of a highly fluid, quick setting glue, preferably of the cyanoacrylate t in the hole 22. Because of capillarity, the glue spreads quickly in the gap between the sleeve and the bushing and sets in a few minutes to a permanent unit. Because of the close fit, the glue joint is very thin, so possible deformations of the glue during the curing have no influence on the position of the fibre.
When the Z-direction fixation is ready, the X- and Y-adjustments are controlled, after which the ring-shaped gap between the flange 18 and the surface 21 is filled with the highly fluid curing glue. In order- to make the glue easily fill the gap well before it is cured, surfaces of the flange 18 and the branch 20 facing each other, as well as the surfaces of the sleeve 15 and the bushing 17, are provided with suitable grooves. These grooves - can be machining marks, for example after turning or milling.
After the.curing, the mounting base can be released from the slide 25 and " - the chuck 28 from the'sleeve 15 and the'coupling is ready for use.
The arrangement according to the invention may not only be used for fixing the end of an optical fibre relative to a light source but also relative to some other optically active element. Examples of such elements are light detectors, lenses,, filters and other optical fibres.
OMPI VIPO

Claims

WE CLAIM
1 An arrangement for optically coupling the end of an optical fibre to another optically active element, for example a light source, compris a mounting base on which said element is arranged, characterized in that the- optical fibre (14) is provided with a sleeve (15) which is arranged a bushing (17) provided with a flange (18), said bushing being arranged fit closely against a part (20) of the mounting base (11) by means of th flange (18), that the end of the optical fibre faces towards the said element (13), said sleeve (15) being fixed to the bushing (17) after fin adjustment and the flange (18) of the bushing being fixed to the mountin " base (11, 20) by introducing a highly fluid, quick-setting glue, prefera of the cyanoacrylate type.
2 An arrangement according to claim 1, characterized in that the
- surfaces which form the glue joints are provided with grooves to facilit the glue spreading.
3 A method with an arrangement according to claim 1 for optically coupling the end of an optical fibre to another optically active element for example a light source, which is mounted on a mounting base and wher optical fibre is provided with a sleeve slidably arranged in a bushing provided with a flange, which bushing is arranged to closely fit against part of the mounting base by its flange in 'such a way that the end of th optical fibre is facing said element, characterized in that said sleeve is adjusted in the axial direction of the bushing (17) and that the bush (17) is adjusted in the axial plane of the flange (18) to the best possi optical coupling between the optical fibre (14) and said element (13), w upon a highly fluid, rapidly setting glue is applied on the one hand bet the sleeve (15) and the bushing (17) and on the other hand between the flange (18) and said part (20) of the mounting base.(H )•
PCT/SE1978/000032 1977-08-17 1978-08-15 Device and method for fixing the end of an optical fibre Ceased WO1979000099A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19782856986 DE2856986A1 (en) 1977-08-17 1978-08-15 DEVICE AND METHOD FOR FIXING THE END OF AN OPTICAL FIBER
BR7808740A BR7808740A (en) 1977-08-17 1978-08-15 PROVISION AND PROCESS FOR OPTICALLY COUPLING THE END OF AN OPTICAL FIBER TO ANOTHER OPTICALLY ACTIVE ELEMENT

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7709267A SE402652B (en) 1977-08-17 1977-08-17 DEVICE AND PROCEDURE FOR FIXING THE END OF AN OPTICAL FIBER
SE7709267 1977-08-17

Publications (1)

Publication Number Publication Date
WO1979000099A1 true WO1979000099A1 (en) 1979-03-08

Family

ID=20332025

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1978/000032 Ceased WO1979000099A1 (en) 1977-08-17 1978-08-15 Device and method for fixing the end of an optical fibre

Country Status (4)

Country Link
GB (1) GB2039380A (en)
IT (1) IT7826817A0 (en)
SE (1) SE402652B (en)
WO (1) WO1979000099A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2488699A1 (en) * 1980-08-13 1982-02-19 Thomson Csf Connector for optical fibre, with adjusting mechanism - uses two contacting blocks having hollow sections, forming cavity, receiving sealing material, and permits sliding contact
FR2497362A1 (en) * 1980-12-29 1982-07-02 Thomson Csf Alignment jig for optical fibre and integrated waveguide - uses blocks supporting plates with V=shaped grooves for fibre and micromanipulator controlled for Precise positioning
FR2503458A1 (en) * 1981-04-02 1982-10-08 Cit Alcatel Optical head mfg. process for electroluminescent device - has unitary construction with U=shaped tin diffusion on substrate with stems holding fibre and device respectively
FR2526176A1 (en) * 1982-04-29 1983-11-04 Thomson Csf METHOD FOR ASSEMBLING AN OPTICAL DEVICE CONTAINING A SEMICONDUCTOR LASER, DEVICE AND MOUNTING BENCH FOR IMPLEMENTING THE SAME
FR2547661A1 (en) * 1983-06-14 1984-12-21 Telecommunications Sa METHOD AND DEVICE FOR CONNECTING AN OPTICAL FIBER WITH A PHOTOSENSITIVE DETECTOR AND THE METHOD OF IMPLEMENTING THE SAME
EP0350793A3 (en) * 1988-07-11 1990-11-22 William E. Durell Variable ratio beam splitter and beam launcher
DE19633293A1 (en) * 1996-08-19 1998-02-26 Deutsche Telekom Ag Method for lining-up two optical micro-components for coupling
WO2003048820A3 (en) * 2001-11-29 2003-10-16 Denselight Semiconductors Pte Optical interface utilising polymer assisted strain relief

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE402652B (en) * 1977-08-17 1978-07-10 Ericsson Telefon Ab L M DEVICE AND PROCEDURE FOR FIXING THE END OF AN OPTICAL FIBER
DE3246359A1 (en) * 1982-12-15 1984-06-20 Standard Elektrik Lorenz Ag, 7000 Stuttgart ADJUSTMENT DEVICE FOR THE GAME-FREE MOVEMENT OF OBJECTS IN A COORDINATE SYSTEM

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2408623A1 (en) * 1974-02-22 1975-09-04 Siemens Ag CONNECTION OF FIBER OPERATING FIBERS
DE2602662A1 (en) * 1976-01-24 1977-07-28 Felten & Guilleaume Carlswerk Light guide fibre coupling device - has fixing sleeves and channel holding three balls for optical communication transmission
SE402652B (en) * 1977-08-17 1978-07-10 Ericsson Telefon Ab L M DEVICE AND PROCEDURE FOR FIXING THE END OF AN OPTICAL FIBER

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2408623A1 (en) * 1974-02-22 1975-09-04 Siemens Ag CONNECTION OF FIBER OPERATING FIBERS
DE2602662A1 (en) * 1976-01-24 1977-07-28 Felten & Guilleaume Carlswerk Light guide fibre coupling device - has fixing sleeves and channel holding three balls for optical communication transmission
SE402652B (en) * 1977-08-17 1978-07-10 Ericsson Telefon Ab L M DEVICE AND PROCEDURE FOR FIXING THE END OF AN OPTICAL FIBER

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2488699A1 (en) * 1980-08-13 1982-02-19 Thomson Csf Connector for optical fibre, with adjusting mechanism - uses two contacting blocks having hollow sections, forming cavity, receiving sealing material, and permits sliding contact
FR2497362A1 (en) * 1980-12-29 1982-07-02 Thomson Csf Alignment jig for optical fibre and integrated waveguide - uses blocks supporting plates with V=shaped grooves for fibre and micromanipulator controlled for Precise positioning
FR2503458A1 (en) * 1981-04-02 1982-10-08 Cit Alcatel Optical head mfg. process for electroluminescent device - has unitary construction with U=shaped tin diffusion on substrate with stems holding fibre and device respectively
FR2526176A1 (en) * 1982-04-29 1983-11-04 Thomson Csf METHOD FOR ASSEMBLING AN OPTICAL DEVICE CONTAINING A SEMICONDUCTOR LASER, DEVICE AND MOUNTING BENCH FOR IMPLEMENTING THE SAME
EP0094274A1 (en) * 1982-04-29 1983-11-16 Thomson-Csf Method of assembling an optical device containing a semiconductor laser, device and assembly bench
FR2547661A1 (en) * 1983-06-14 1984-12-21 Telecommunications Sa METHOD AND DEVICE FOR CONNECTING AN OPTICAL FIBER WITH A PHOTOSENSITIVE DETECTOR AND THE METHOD OF IMPLEMENTING THE SAME
EP0138630A1 (en) * 1983-06-14 1985-04-24 SAT (Société Anonyme de Télécommunications),Société Anonyme Apparatus for joining an optical fibre and a photodetector, and method of positioning these
EP0350793A3 (en) * 1988-07-11 1990-11-22 William E. Durell Variable ratio beam splitter and beam launcher
DE19633293A1 (en) * 1996-08-19 1998-02-26 Deutsche Telekom Ag Method for lining-up two optical micro-components for coupling
WO2003048820A3 (en) * 2001-11-29 2003-10-16 Denselight Semiconductors Pte Optical interface utilising polymer assisted strain relief

Also Published As

Publication number Publication date
SE402652B (en) 1978-07-10
GB2039380A (en) 1980-08-06
IT7826817A0 (en) 1978-08-17

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