WO2002035268A1 - Procede de fabrication de fibres optiques - Google Patents

Procede de fabrication de fibres optiques Download PDF

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Publication number
WO2002035268A1
WO2002035268A1 PCT/AU2001/001364 AU0101364W WO0235268A1 WO 2002035268 A1 WO2002035268 A1 WO 2002035268A1 AU 0101364 W AU0101364 W AU 0101364W WO 0235268 A1 WO0235268 A1 WO 0235268A1
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WO
WIPO (PCT)
Prior art keywords
fibre
tec
ofthe
region
length
Prior art date
Application number
PCT/AU2001/001364
Other languages
English (en)
Inventor
David Bernardi
Original Assignee
Australian Photonics Pty Limited
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
Priority claimed from AUPR0997A external-priority patent/AUPR099700A0/en
Priority claimed from AUPR2259A external-priority patent/AUPR225900A0/en
Application filed by Australian Photonics Pty Limited filed Critical Australian Photonics Pty Limited
Priority to AU2002211990A priority Critical patent/AU2002211990A1/en
Publication of WO2002035268A1 publication Critical patent/WO2002035268A1/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
    • G02B6/245—Removing protective coverings of light guides before coupling
    • 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
    • G02B6/2552—Splicing of light guides, e.g. by fusion or bonding reshaping or reforming of light guides for coupling using thermal heating, e.g. tapering, forming of a lens on light guide ends

Definitions

  • the present invention relates to a method of manufacturing thermally expanded core (TEC) optical fibres and, in particular, to a method of manufacturing TEC optical fibres by use of a conveyor mechanism.
  • Telecommunication optical fibres typically comprise a glass portion for transmission of light, and a surrounding polymer coating for protection ofthe glass portion during handling, and from the environment during its service life.
  • the glass portion typically comprises a central core of relatively higher refractive index glass surrounded concentrically by a cladding of relatively lower refractive index glass.
  • the relatively higher refractive index glass in the core of the fibre is typically generated by the addition of minute quantities of dopants (such as germanium dioxide GeO 2 ) to the silica (silicon dioxide SiO 2 ) during fibre manufacture.
  • TEC optical fibres are manufactured by batch processing. In this process a number of lengths of optical fibre are firstly hand cleaved from a storage reel, and the coating is hand stripped from an intermediate region of each length, revealing the inner glass portion of the fibre. A number of lengths of optical fibre are then hand-mounted in a heating chamber containing a series of hydrogen micro-burners or heating elements. Each micro-burner or heating element scans back and forth along a short section of the stripped region of each length. The scanning action ofthe micro-burners or heating elements is accurately controlled as a function of time, causing the dopants in the core to progressively diffuse into the cladding, thereby producing a region of expanded higher refractive index in the optical fibre. Process control ensures that the refractive index properties of this region, both as a function of radius from the centre ofthe core and as a function of axial position along the region, are accurately predicted.
  • the optical fibre is then cleaved at the point in the region where the core has been expanded to the greatest diameter, corresponding normally to where heating has been applied for the longest time and/or the resulting temperature profile in the fibre has been maintained highest, thereby affording the maximum opportunity for dopant diffusion.
  • the processed region of the fibre is normally arranged to be in the middle of the original length of fibre, thus forming two lengths of TEC optical fibre as a result of heating each region.
  • the thermally expanded core has the optical property of having a greater mode field diameter (typically by a factor of 2) than that ofthe standard optical fibre before TEC treatment. It is then possible to insert an optical device between the fibres with the expanded mode field diameter without significant loss increase.
  • the TEC fibre is used in decreasing the measurable losses found when connecting fibres with mismatched cores, or when connecting a fibre to macroscopic optical devices and thin film optical devices.
  • a common example of using the TEC fibre is in the optical coupling of a laser diode module into a single mode optical fibre, or in coupling erbium-doped optical fibre to a single-mode fibre, each of which can have different mode field diameters.
  • TEC thermally expanded core
  • a first aspect ofthe present invention provides a method of manufacturing thermally expanded core (TEC) optical fibres, the fibre comprising a glass portion for transmission of light, and a surrounding polymer coating for protection of the glass portion, the glass portion comprising a central core of relatively higher refractive index glass surrounded by a cladding of relatively lower refractive index glass, the method comprising the steps of:
  • step 2 the length of fibre is attached to the conveyor mechanism either before or after the axial force is applied to the TEC region o the length of fibre.
  • the fibre is cleaved into lengths in step 2.
  • attaching each length of fibre to the conveyor mechanism in step 2 comprises hanging each length of fibre from the conveyor mechanism, and the axial force is applied downwardly to the fibre below the TEC region.
  • the applying ofthe axial force in step 2 is achieved by attaching a predetermined mass to the length of fibre below the TEC region.
  • the coating is stripped from the length of fibre in the TEC region in step 2.
  • step 3 comprises monitoring the length ofthe fibre.
  • the axial force and/or heating power of the through-feed heater is closed-loop controlled as a function ofthe length.
  • step 3 comprises monitoring the diameter of the cladding of the TEC region.
  • the axial force and/or heating power of the through-feed heater is closed-loop controlled as a function of the diameter.
  • the length of the fibre and/or the diameter ofthe cladding of the TEC region is monitored during or after cooling. It is preferred that, in an additional step 5, the length of fibre is cleaved at a point at, or adjacent to, the centre ofthe TEC region, and the portion of the length of fibre on one side of this cleaving point is discarded.
  • the length of fibre is cleaved at a point at, or adjacent to, the centre of the TEC region, and the portion ofthe length of fibre below this cleaving point is discarded.
  • a laser source is applied to the end of the remaining length of fibre remote from the TEC region, an imaging device is arranged at the other end of the fibre adjacent to the TEC region sensitive to light at the frequency of the laser source, the last light emitted from the end ofthe fibre through the TEC region produces an intensity pattern on the imaging device, and thereby enabling the performance ofthe length of fibre, including the TEC region, to be characterised.
  • a second aspect ofthe present invention provides a method of manufacturing thermally expanded core (TEC) optical fibres, the fibre comprising a glass portion for transmission of light, and a surrounding polymer coating for protection ofthe glass portion, the glass portion comprising a central core of relatively higher refractive index glass surrounded by a cladding of relatively lower refractive index glass, the method comprising the steps of: 1. unreeling the fibre and cleaving the fibre into predefined lengths,
  • each length of fibre to a continuous transverse conveyor mechanism, the transverse conveyer mechanism arranged to transfer a TEC region of the fibre through a through- feed heater device and then out of the through- feed heater,
  • attaching each length of fibre to the continuous transverse conveyor mechanism comprises hanging each length of fibre from the continuous transverse conveyor mechanism, and the axial force is applied downwardly to the fibre below the TEC region. It is preferred that the coating is stripped from the fibre in the TEC region prior to step 4.
  • each length of hanging fibre may relatively be moved vertically as it travels horizontally along the continuous transverse conveyor to allow for the ends of the fibre to be dipped into a chemical bath which strips the coating prior to step 3.
  • step 3 comprises attaching a known mass to the fibre below the TEC region.
  • step 4 comprises monitoring the length of the fibre. It is preferred that the axial force and/or heating power is closed-loop controlled as a function of the length.
  • the through-feed heater provides a continuous flame across the length of heating.
  • the through feed heater comprises several individual pencil flames spaced equally to the spacing between hanging fibres.
  • the through-feed heater is controlled in movement in the direction of travel ofthe fibres along the continuous transverse conveyor mechanism.
  • step 4 comprises monitoring the diameter ofthe cladding of the TEC region.
  • the axial force and/or heating power is closed-loop controlled as a function ofthe diameter.
  • the length ofthe fibre and/or the cladding diameter ofthe TEC region is monitored during cooling.
  • the length of fibre is cleaved at a point at, or adjacent to, the centre ofthe TEC region, and the portion ofthe length of fibre on one side of this cleaving point is discarded.
  • the length of fibre is cleaved at a point at, or adjacent to, the centre ofthe TEC region, and the portion ofthe length of fibre below this cleaving point is discarded.
  • a laser source is applied to end of the remaining length of fibre remote from the TEC region, an imaging device is arranged at the other end ofthe fibre adjacent to the TEC region sensitive to light at the frequency of the laser source, the laser light emitted from the end of the fibre through the TEC region produces an intensity pattern on the imaging device, and thereby enabling the performance ofthe length of fibre, including the TEC region, to be characterised.
  • the words 'comprise', 'comprising', and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in the sense of "including, but not limited to”.
  • Fig. 1 is a cross-section of one end of an optical fibre, before application ofthe TEC process according to the present invention
  • Fig. 2 is a cross-section of one end of a TEC optical fibre, after application of the TEC process according to the present invention
  • Fig. 3 is a layout ofthe processing equipment required to produce a TEC optical fibre via a first embodiment of the process according to the present invention
  • Fig. 4 is a layout ofthe processing equipment required to produce a TEC optical fibre via a second embodiment ofthe process according to the present invention
  • Fig. 5 is a layout ofthe heating manifold used in producing a TEC optical fibre via a first embodiment of the process according to the present invention
  • Fig. 6 is a layout of the chemical fibre stripping used in producing a TEC optical fibre via a first embodiment of the process according to the present invention
  • Fig. 7 is a layout of the chemical fibre stripping used in producing a TEC optical fibre via a first embodiment ofthe process according to the present invention.
  • Fig. 8 is a layout ofthe manifold heating using pencil flames used in producing a TEC optical fibre via a first embodiment ofthe process according to the present invention. PREFERRED EMBODIMENT OF THE INVENTION
  • Fig. 1 shows a cross-section of one end of an optical fibre, before application ofthe TEC process according to the present invention.
  • Optical fibre 1 comprises glass portion 2 for transmission of light, and surrounding polymer coating 3 for protection of the glass portion during handling, and from the environment during its service life.
  • Glass portion 2 comprises central core 4 of relatively higher refractive index glass (typically about 1.500), surrounded concentrically by cladding 5 of relatively lower reflective index glass (typically about 1.485).
  • the diameter of coating 3 and cladding 5 are 250 um and 125 um respectively.
  • the diameter of core 4 is typically only 9 um in single mode fibres, and up to 85 um in graded-index fibres and 200 um in step index multi-mode fibres.
  • the refractive index of core 4 is normally arranged to be about 1% higher than cladding 5, corresponding to a numerical aperture of 0.21 and a confinement angle of 8 deg, below which a total internal reflection condition occurs at the core/cladding interface.
  • This is "basic" mechanism whereby light is confined within core 4 as it is communicated through optical fibre 1.
  • waveguide theory predicts that some light does actually penetrate into cladding 5, despite the fact that it nominally undergoes total internal reflection at the core/cladding interface 8.
  • the effect is significant enough for single mode fibres that, in practice, they are characterised by a parameter termed "mode field diameter" which is typically a little larger than diameter of core 4.
  • Fig. 2 shows a cross-section of one end of TEC optical fibre 9, after application ofthe TEC process according to the present invention.
  • Coating 3 is stripped away in the area of optical fibre adjacent to TEC region 6.
  • core 4 of higher refractive index has expanded in diameter as a result ofthe radially outward diffusion ofthe germanium dioxide (GeO 2 ) dopant, originally located in the glass in core 4, across the original core/cladding interface 8 under the action ofthe through-feed heater.
  • the fibre has been cleaved along cleave line 7 and portion 10 ofthe original optical fibre 1 discarded.
  • the resulting TEC optical fibre 9 has a correspondingly increased mode field diameter 14 in TEC region 6 adjacent to fibre end 11.
  • Fig. 3 shows a typical layout of the processing equipment required to produce TEC optical fibre 9 according to a first embodiment of the present invention.
  • a known length (typically 0.5 - 1 m) of optical fibre 1 is unreeled from optical fibre reel 20, before the cleaving ofthe fibre by fibre optic cleaver 21.
  • the upper portion 22 of the resulting length of optical fibre 1 is then attached to continuous transverse conveyor mechanism 23.
  • Optical fibre 1 consequently hangs substantially vertically from attachment point 24 on continuous transverse conveyer mechanism 23 under the influence of gravity.
  • Coating 3 on lower portion 25 of optical fibre 1 is then stripped by coating-stripper 26.
  • the coating stripper 26 consists of a mechanical stripping method which physically removes the acrylic coating 3 by the way of scraping mechanical edges along the fibre 1.
  • the continuous transverse conveyor mechanism 23 during horizontal motion can undergo a vertical motion so as to change the height ofthe fibres 9 and hence lowers the ends ofthe said fibres into a vessel 50 containing a chemical 51 which has the properties of removing the acrylic coating 3 from the fibre 1 without causing damage to the core 4 or cladding 5 of said fibres.
  • the vessel 50 can be moved vertical relative to the conveyor to envelop the ends of several ofthe fibres 1. The vessel would then follow the path of the continuous transverse conveyor mechanism 23 for a known distance before being lowered away from the ends of the said fibres.
  • the time in which the ends ofthe fibres 1 are exposed to the chemical 51 is sufficient to allow for the complete removal ofthe acrylic coating 3 from the length of the fibre that is immersed below the level of the said chemical contained in the said vessel.
  • the chemical used is an acid that is known to quickly dissolve the acrylic coating ofthe fibre without dissolving the core or the cladding of the fibre. This process could be used to strip the fibres in lots, with typically between 1 and 10 fibres being dipped at any one time.
  • the process of lowering the fibres 1 can also be performed into a second vessel containing a second chemical.
  • the said second chemical would have the properties of removing or diluting the first chemical from the fibres.
  • a further method for removal ofthe coating 3 from the fibres 1 is shown in Fig
  • a predetermined mass 27 (typically 2 — 20 g) is then attached to lower portion 25 which applies an axial load to TEC region 6 of optical fibre 1.
  • This axial load also straightens optical fibre 1 and orientates it exactly vertically in preparation for the heating operation to be applied to TEC region 6.
  • Other techniques could also be used to apply an axial load to TEC region 6 according to the present invention such as a spring, electromagnetic voice coil arrangement, or pneumatic mechanism.
  • mass 27 is attached to lower portion 25 of fibre 1 prior to attachment of upper portion 22 of fibre 1 to conveyor mechanism 23 and before stripping. For reasons of better fibre handling, the mass attachment operation could be carried out immediately after unreeling and before cleaving of fibre 1 into the required length.
  • the length of optical fibre 1 then proceeds along the conveyor mechanism 23 and enters through-feed heater 28.
  • Through-feed heater 28 locally heats a short length ofthe stripped lower portion 25 of optical fibre 1 referred to as TEC region 6 in this specification.
  • the heating process performed inside through-feed heater 27 is temperature controlled as a function of the position of optical fibre 1 as it continuously passes through through-feed heater 28 under the action of continuous transverse conveyor mechanism 23.
  • the time period of heating is also controlled by the overall feed rate of continuous transverse conveyor mechanism 23.
  • the extended duration of heating afforded by this through-feed process greatly increases the overall diffusion of dopants and hence the increase in the mode field diameter of TEC region 6 of optical fibre 1.
  • the through-feed heater 28 can consist of a manifold of a continuous flame across the length of heating in the through feed heater.
  • the manifold 60 can consist of several individual pencil flames 61 that are spaced equal to that of the spacings ofthe fibres 1 attached to the continuous transverse conveyor mechanism 23.
  • the said individual pencil flames can either be of equal heating output or a heating output that is a function ofthe distance into the through- feed heater 28.
  • the manifold 60 of individual pencil flames is able to be moved along at the same rate as the conveyor system, with the pencil flames being aligned to that ofthe fibres 1.
  • the said manifold When the said manifold is moved a predetermined distance or comes to a known position, the said manifold is indexed back along the conveyor a known number of whole fibre spacing increments so that the pencil flames again are aligned to the adjacent fibres.
  • the said manifold for heating can also be controlled to heat the lengths ofthe fibres around the TEC region 6.
  • the said manifold can also be moved substantially perpendicular and independent to the movement along the direction ofthe continuous transverse conveyor system 23. The heating ofthe TEC region 6 therefore can undergo a controlled heating profile along the length of the fibres 1 and as such can control the length and shape ofthe expansion ofthe said TEC region.
  • a further addition can include a second manifold for heating, either adjacent or offset in height to the first manifold, in which the process of sweeping two individual pencil flames across each fibre results in greater control ofthe temperature profile across the length of the fibres 1.
  • the second manifold can also undergo independent movement to that of the conveyor system in the same way in which the first manifold movement occurs.
  • the second manifold can also be moved in unison with or independent to that of the first manifold system.
  • the temperature control with the manifolds can be controlled by reducing or increasing the rate of burning or by the addition of cooling air directed at or near to the burning region.
  • the burning process can also include using excess air to create a leaner burning ofthe pencil flame, which results in a cooler burning flame.
  • the manifold or manifolds of pencil flame heating elements can also be replaced by heating elements consisting of arcing points or electric coil heating elements.
  • the electric heating coil elements can either directly apply radiant heating to the fibre or use induction heating of either a plate or cylinder of metal around the fibre 1 after stripping ofthe acrylic coating 3.
  • the length of optical fibre 1 is monitored as mass 27 successively passes over proximity sensors 29 (prior to entering though-feed heater 28), 30 (inside through-feed heater 28), and 31 (after exiting though-feed heater 28).
  • a temperature sensor 32 monitors the temperature at which optical fibre 1 is being heated in through-feed heater 28. The outputs from proximity sensors 29, 30 and 31 and temperature sensor 32 are used as inputs into the control of the through-feed heating process.
  • TEC region 6 of optical fibre 1 This is used to prevent undesirable physical deformation of TEC region 6 of optical fibre 1. This can occur because the temperature required to expedite the diffusion is typically very close to the liquid transition temperature range of glass portion 2 of optical fibre 1. The temperature is certainly high enough that significant degrees of viscous flow can occur in the glass due to the combined action of gravity, surface tension, and the externally applied axial force provided by mass 27.
  • Optical fibre 1 then proceeds on continuous transverse conveyer mechanism 23 into cool down area 33 which allows for the controlled cooling of the fibre, hence minimising the generation of residual internal stresses in TEC region 6.
  • Optical fibre 1 is then automatically cleaved by fibre-optic cleaver 34 at cleaving point 7 which is at, or adjacent to, the centre of TEC region 6 corresponding to the point of largest mode field diameter of TEC region 6.
  • the length of fibre 10 below cleaving point 7 is discarded.
  • the TEC optical fibre 9 is now complete apart from testing and characterising its optical performance.
  • Laser source 35 is then spliced using the splicer 37 to upper end 36 ofthe remaining length of optical fibre 1, remote from TEC region 6.
  • Imaging device 38 sensitive to light at the frequency of laser source 35, is similarly arranged at lower end 11 of TEC optical fibre 9 adjacent to TEC region 6.
  • the laser light emitted from end 11 of TEC optical fibre through TEC region 6 produces an intensity pattern on imaging device 38, thereby enabling the performance of TEC optical fibre 9, including TEC region 6, to be characterised.
  • Fig. 4 shows a typical layout ofthe processing equipment to produce TEC optical fibre 9 according to a second embodiment of the present invention.
  • the TEC process on optical fibre 1 is carried out with TEC region 6 orientated horizontally and the conveyor mechanism comprises in this case a unidirectional, rectilinear, parallel shaft and spool arrangement.
  • Optical fibre 1, having being stripped of its coating 3 in middle region 40, is placed across first spool 41 , which is splined to first shaft 42, so as to allow relative axial movement between spool and shaft.
  • Optical fibre 1 is also attached to second spool 43, which is journalled to second shaft 44, so as to allow relative axial and rotational movement between spool and shaft.
  • Counterweight 45 is attached to second spool 43, thereby applying a torque to second spool 43 about second shaft 44 and hence applying a known applied axial load to TEC region 6 of optical fibre 1 between first spool 41 and second spool 43.
  • Optical fibre 1 is moved along the through-feed heater 28, so as to provide a continuous heating process along the length ofthe said through- feed heater. Exhaust heat from the said through-feed heater is exhausted away from the said fibre.
  • a complete assembly of first spool, second spool, fibre and counterweight is always added from one end of said first shaft and said second shaft and is always removed from the opposite end of said first shaft and said second shaft.
  • the process is described in respect to a single optical fibre 1 which is processed sequentially into a single TEC optical fibre 9.
  • the process is arranged to be executed continuously with successive optical fibres 1 unreeled, cleaved, and attached to conveyor mechanism 23 (or alternatively unreeled, attached to conveyor mechanism 23, and cleaved) at regular time intervals by hand or industrial robot, and subsequently cleaved, spliced, tested and removed from conveyor mechanism 23 at the same regular time intervals, again by hand, industrial robot, or other automated device.
  • this loading/unloading time interval can be made relatively short (say 30 seconds), yet still allowing a substantially much larger time interval during which TEC region 6 is passing through through-feed heater 27 (say 1-12 hours).

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

Abstract

L'invention concerne un procédé de fabrication de fibres optiques à âme dilatée par voie thermique et, plus particulièrement, un procédé de fabrication de ces fibres optiques au moyen d'un mécanisme de transport. Un des modes de réalisation de l'invention offre un procédé de fabrication de fibres optiques à âme dilatée par voie thermique, ces fibres comportant une partie en verre destinée à transmettre de la lumière, et un revêtement polymère périphérique destiné à protéger la partie en verre, laquelle comprend une âme centrale à indice de réfraction relativement supérieur au verre enveloppée par une gaine à indice de réfraction relativement inférieur au verre, le procédé consistant : i) à dérouler la fibre et à la couper en longueurs définies, ii) à attacher chaque longueur de fibre à un convoyeur transversal continu, ce convoyeur étant conçu de manière à transférer une zone de la fibre à âme dilatée par voie thermique au moyen d'un dispositif chauffant de passage, puis hors dudit dispositif, iii) à appliquer une force axiale connue à la zone de la fibre à âme dilatée par voie thermique, iv) à transférer cette zone à travers le dispositif chauffant de passage et à chauffer ainsi localement la zone à âme dilatée par voie thermique, entraînant l'expansion de l'âme au niveau de cette zone et améliorant ainsi le diamètre de champ de mode de la fibre dans cette zone, v) à transférer cette zone hors du dispositif chauffant de passage, afin de permettre à la zone à âme dilatée par voie thermique de refroidir, les étapes du procédé étant exécutées en continu de manière que l'intervalle au cours duquel chaque zone à âme dilatée par voie thermique est transférée à travers le dispositif chauffant de passage est sensiblement supérieur à l'intervalle de temps entre le déroulage et le sectionnement des fibres successives, permettant ainsi la fabrication de grands volumes de fibres à âme dilatée par voie thermique, et permettant aussi à l'expansion de l'âme pendant le chauffage d'être relativement lente et contrôlée.
PCT/AU2001/001364 2000-10-24 2001-10-24 Procede de fabrication de fibres optiques WO2002035268A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002211990A AU2002211990A1 (en) 2000-10-24 2001-10-24 Method for optical fibre manufacture

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AUPR0997A AUPR099700A0 (en) 2000-10-24 2000-10-24 Method for optical fibre manufacture
AUPR0997 2000-10-24
AUPR2259 2000-12-22
AUPR2259A AUPR225900A0 (en) 2000-12-22 2000-12-22 Method for optical fibre manufacture

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Publication Number Publication Date
WO2002035268A1 true WO2002035268A1 (fr) 2002-05-02

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017062839A1 (fr) * 2015-10-09 2017-04-13 Vascular Imaging Corporation Ensembles de capteurs optiques et procédés

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5142603A (en) * 1988-04-29 1992-08-25 British Telecommunications Public Limited Company Method of connecting high numerical aperture optical waveguides
US5301252A (en) * 1991-09-26 1994-04-05 The Furukawa Electric Company, Ltd. Mode field conversion fiber component
WO1997011917A1 (fr) * 1995-09-29 1997-04-03 Corning Incorporated Procede et dispositif de fabrication d'un coupleur a fibres optiques
EP0770890A1 (fr) * 1995-10-23 1997-05-02 Fujikura Ltd. Filtre à fibre optique
EP0899594A2 (fr) * 1997-08-25 1999-03-03 Sumitomo Electric Industries, Ltd. Appareil d'épissage par fusion de ruban de fibres optiques
EP0901026A1 (fr) * 1997-08-04 1999-03-10 PIRELLI CAVI E SISTEMI S.p.A. Procédé de couplage optique de components optiques dans un appareil opto-electronique et appareil construit selon ledit procédé
WO2000019256A1 (fr) * 1998-09-25 2000-04-06 Corning Incorporated Fibre optique ayant un diametre de champ de mode dilate et procede de dilatation du diametre de champ de mode d'une fibre optique
US6062743A (en) * 1997-06-09 2000-05-16 Telefonaktiebolaget Lm Ericsson Splicing different optical fiber types
US6244757B1 (en) * 1997-12-30 2001-06-12 Samsung Electronics Co., Ltd. Thermally expanded core fiber fabrication method and optical fiber coupling method

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5142603A (en) * 1988-04-29 1992-08-25 British Telecommunications Public Limited Company Method of connecting high numerical aperture optical waveguides
US5301252A (en) * 1991-09-26 1994-04-05 The Furukawa Electric Company, Ltd. Mode field conversion fiber component
WO1997011917A1 (fr) * 1995-09-29 1997-04-03 Corning Incorporated Procede et dispositif de fabrication d'un coupleur a fibres optiques
EP0770890A1 (fr) * 1995-10-23 1997-05-02 Fujikura Ltd. Filtre à fibre optique
US6062743A (en) * 1997-06-09 2000-05-16 Telefonaktiebolaget Lm Ericsson Splicing different optical fiber types
EP0901026A1 (fr) * 1997-08-04 1999-03-10 PIRELLI CAVI E SISTEMI S.p.A. Procédé de couplage optique de components optiques dans un appareil opto-electronique et appareil construit selon ledit procédé
EP0899594A2 (fr) * 1997-08-25 1999-03-03 Sumitomo Electric Industries, Ltd. Appareil d'épissage par fusion de ruban de fibres optiques
US6244757B1 (en) * 1997-12-30 2001-06-12 Samsung Electronics Co., Ltd. Thermally expanded core fiber fabrication method and optical fiber coupling method
WO2000019256A1 (fr) * 1998-09-25 2000-04-06 Corning Incorporated Fibre optique ayant un diametre de champ de mode dilate et procede de dilatation du diametre de champ de mode d'une fibre optique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"The FFS-2000 fusion slicing workstation with advanced imaging and programming capabilities", COMMERCE BUSINESS DAILY, MODEL FFS-2000 FIBER OPIC SPLICER WORKSTATION 214. RECORD NO. 2685PR590009, 19 September 2000 (2000-09-19), USA, Retrieved from the Internet <URL:http://www.vytran.com/ffs2000.html> *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017062839A1 (fr) * 2015-10-09 2017-04-13 Vascular Imaging Corporation Ensembles de capteurs optiques et procédés
US11633113B2 (en) 2015-10-09 2023-04-25 Phyzhon Health Inc. Optical sensor assemblies and methods

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