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WO2003058309A1 - Procede et appareil concernant des fibres optiques microstructurees - Google Patents

Procede et appareil concernant des fibres optiques microstructurees Download PDF

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Publication number
WO2003058309A1
WO2003058309A1 PCT/GB2003/000066 GB0300066W WO03058309A1 WO 2003058309 A1 WO2003058309 A1 WO 2003058309A1 GB 0300066 W GB0300066 W GB 0300066W WO 03058309 A1 WO03058309 A1 WO 03058309A1
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WO
WIPO (PCT)
Prior art keywords
fibre
preform
structures
period
helical
Prior art date
Application number
PCT/GB2003/000066
Other languages
English (en)
Inventor
Jonathan Cave Knight
Timothy Adam Birks
Philip St. John Russell
Brian Joseph Mangan
Original Assignee
Blazephotonics 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 GB0200603A external-priority patent/GB0200603D0/en
Priority claimed from GB0207240A external-priority patent/GB0207240D0/en
Priority claimed from GB0210933A external-priority patent/GB0210933D0/en
Application filed by Blazephotonics Limited filed Critical Blazephotonics Limited
Priority to AU2003201650A priority Critical patent/AU2003201650A1/en
Publication of WO2003058309A1 publication Critical patent/WO2003058309A1/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
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/02295—Microstructured optical fibre
    • G02B6/02314—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes
    • G02B6/02342—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes characterised by cladding features, i.e. light confining region
    • G02B6/02347—Longitudinal structures arranged to form a regular periodic lattice, e.g. triangular, square, honeycomb unit cell repeated throughout cladding
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
    • C03B37/01211—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments by inserting one or more rods or tubes into a tube
    • C03B37/0122—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments by inserting one or more rods or tubes into a tube for making preforms of photonic crystal, microstructured or holey optical fibres
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
    • C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
    • C03B37/02745—Fibres having rotational spin around the central longitudinal axis, e.g. alternating +/- spin to reduce polarisation mode dispersion
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/03—Drawing means, e.g. drawing drums ; Traction or tensioning devices
    • C03B37/032—Drawing means, e.g. drawing drums ; Traction or tensioning devices for glass optical fibres
    • 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
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/105—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type having optical polarisation effects
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2203/00—Fibre product details, e.g. structure, shape
    • C03B2203/10—Internal structure or shape details
    • C03B2203/14—Non-solid, i.e. hollow products, e.g. hollow clad or with core-clad interface
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2203/00—Fibre product details, e.g. structure, shape
    • C03B2203/10—Internal structure or shape details
    • C03B2203/18—Axial perturbations, e.g. in refractive index or composition
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2203/00—Fibre product details, e.g. structure, shape
    • C03B2203/10—Internal structure or shape details
    • C03B2203/18—Axial perturbations, e.g. in refractive index or composition
    • C03B2203/20—Axial perturbations, e.g. in refractive index or composition helical
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2203/00—Fibre product details, e.g. structure, shape
    • C03B2203/36—Dispersion modified fibres, e.g. wavelength or polarisation shifted, flattened or compensating fibres (DSF, DFF, DCF)
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2203/00—Fibre product details, e.g. structure, shape
    • C03B2203/42—Photonic crystal fibres, e.g. fibres using the photonic bandgap PBG effect, microstructured or holey optical fibres
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2205/00—Fibre drawing or extruding details
    • C03B2205/06—Rotating the fibre fibre about its longitudinal axis
    • 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
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
    • G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
    • G02B6/0208—Refractive index modulation gratings, e.g. Bragg gratings characterised by their structure, wavelength response
    • G02B6/02085—Refractive index modulation gratings, e.g. Bragg gratings characterised by their structure, wavelength response characterised by the grating profile, e.g. chirped, apodised, tilted, helical
    • G02B2006/0209—Helical, chiral gratings

Definitions

  • This invention relates to the field of microstructured optical fibres.
  • a new type of optical fibre has been demonstrated, called the photonic crystal fibre (PCF) , holey fibre or microstructured fibre [J. C. Knight et al . , Optics Letters v. 21 p. 203] .
  • a microstructured fibre is made from a single solid material such as fused silica glass, within which is embedded an array of holes.
  • Those ⁇ holes' are usually air holes but may alternatively be, for example, regions of a solid material (e.g. silica doped with impurities to change its refractive index) .
  • the holes run parallel to the fibre axis and extend the full length of the fibre.
  • a region of solid material between holes, larger than neighbouring such regions, can act as a waveguiding fibre core.
  • Light can be guided in this core in a manner analogous to total-internal-reflection guiding in standard optical fibres.
  • Standard optical fibres are widely used in applications such as telecommunications. Such fibres are typically made entirely from solid materials such as glass, with each fibre having the same cross-sectional structure along its length. Transparent material in one part (usually the middle) of the cross-section has a higher refractive index than material in the rest of the cross- section and forms an optical core. Light is guided in the optical core by total internal reflection from the material surrounding the core, which forms a cladding region.
  • Standard fibres are made from fused silica glass, incorporating a controlled "concentration of dopant, and have a circular outer boundary typically of diameter 125 microns.
  • Standard fibres can be single-mode or multimode.
  • One way to provide such an enlarged solid region in a microstructured fibre with an otherwise periodic array of holes is to omit one or more holes from the structure.
  • the array of holes need not be periodic for total- internal-reflection guiding to take place (we may nevertheless refer to such a fibre as a photonic-crystal fibre) .
  • Another mechanism for guiding light in microstructured fibres is based on photonic bandgap effects rather than total internal reflection.
  • light can be confined inside a hollow core (an enlarged air hole) by a suitably-designed array of smaller holes surrounding the core [R. F. Cregan et al . , Science v. 285 p. 1537] .
  • True guidance in a hollow core is not possible at all using total internal reflection.
  • Microstructured fibres can be fabricated by stacking glass elements (rods and tubes) on a macroscopic scale to form a bundle having the required pattern and shape, and holding them in place while fusing them together.
  • This primary preform can then be drawn into a fibre, using the same type of fibre-drawing tower that is used to draw standard fibre from a standard-fibre preform.
  • the primary preform can, for example, be formed from fused silica elements with a diameter of about 0.8 mm.
  • single-mode fibre can in fact support two transverse modes, differing in the polarisation direction of the light they contain. The two modes correspond to light having two orthogonal polarisations. In a birefringent . optical fibre, the two modes travel at different speeds along the fibre .
  • Microstructured fibres may be made strongly birefringent (see for example, International Patent Application No. PCT/GB00/00600 (The University of Bath)). However, even a microstructured fibre that has had no structures deliberately introduced to enhance its birefringence, yet subject to normal manufacturing imperfections, typically exhibits much stronger birefringence than a standard fibre, as a result of the much higher index contrast in the microstructured fibre. For some applications, the strong intrinsic birefringence of a microstructured fibre is desirable.
  • a microstructured fibre it would be advantageous for a microstructured fibre to exhibit reduced birefringence or even no birefringence.
  • orientation of the polarisation axes of the fibre it would be advantageous for the orientation of the polarisation axes of the fibre to be readily controllable .
  • An object of the invention is to provide a microstructured optical fibre having such advantageous polarisation properties.
  • a microstructured optical fibre comprising a core region and a cladding region, the cladding region comprising a plurality of structures, which have a first refractive index and are embedded in a solid matrix material having a second, different, refractive index, characterised in that the structures are helical along the fibre.
  • the structures are helical about that axis.
  • the properties of a fibre having such helical structures is dependent upon the period of the helices.
  • a helix viewed from the side, is sinusoidal and therefore has an identifiable period.
  • a fibre produced by drawing at a draw speed of 1 ms "1 and a spinning rotation of 1 revolution per second produces a helical structure of 1 revolution per meter (that is, a structure having a period of 1 m) .
  • the period of the helices is constant along the length of the fibre.
  • the period of the helices may vary along the length of the fibre, in which case the polarisation properties of the fibre may change along the fibre' s length.
  • the helices extend for at least one full period along the fibre. More preferably, the helices extend for a plurality of full periods along the fibre. Still more preferably, the helices extend along the full length of the fibre.
  • the helical structures rotate in the same sense along their full length.
  • the sense of rotation of the helical structures may alternate in successive * regions along the fibre.
  • the structures may initially be helical in a clockwise sense, then straighten out and then become helical in an anticlockwise sense.
  • the helical structures may form a rocking filter, in which case the structures will be a plurality of short helices, successive ones of which rotate in opposite senses.
  • the period of each of the helices is at least approximately equal to one half of the beat length of the fibre.
  • Such a rocking filter may be made, for example, by rotating the fibre alternately in opposite senses as the fibre is drawn from a preform.
  • the fibre would have a characteristic beat length between its fast and slow polarisation modes, the value of which would depend upon parameters of the particular fibre [Barlow et al , Appl. Opt. 20, p.2962 (1981) and Barlow et al, Electron. Lett. 17, p. 725 (1981)]. If the period of the helix of the helical structures is much shorter than that beat length then the polarisation modes will be coupled -to each other.
  • the helical structures have a period that is sufficiently short that a birefringence effect (such as phase birefringence, differential group delay (DGD) or polarisation mode dispersion (PMD) ) in the fibre is reduced.
  • a birefringence effect such as phase birefringence, differential group delay (DGD) or polarisation mode dispersion (PMD)
  • the helical structures have a period that is sufficiently short that, in use, polarisation modes of light guided in the fibre are strongly coupled to each other. More preferably, the helical structures are sufficiently short that the fibre exhibits a birefringence of less than half than it would exhibit if it were not spun. Still more preferably, the helical structures have a period that is sufficiently short that the fibre exhibits substantially no birefringence effects.
  • the microstructured fibre will be birefringent .
  • the rotation of the structures about the axis of the helix will cause the polarisation axes of the fibre to rotate along the length of the fibre.
  • the helical structures may have a period that is sufficiently long that there is substantially no coupling between polarisation modes of the fibre.
  • the helical structures have a period that is sufficiently long that light may pass adiabatically along the fibre as the polarisation axes rotate.
  • the period of the helical structures may be of a similar length to the beat length; such an arrangement gives elliptical birefringence.
  • An adiabatic decrease in the period of the helices for example from infinity (i.e. a region of the fibre in which the structures are not helical but rather extend parallel to the fibre axis) to a length very much shorter than the beat length of the fibre, may be used to provide a stable, broadband linear-to-circular polarisation converter.
  • the helical structures may be continuous or discontinuous along the length of the fibre.
  • the helical structures are regions of a dielectric material that extend unbroken along their respective helices for at least one period of the helical structure. More preferably, the regions of the dielectric material extend unbroken along the length of the fibre.
  • the helical structures may be regions of a dielectric material that are discontinuous along their respective helices; thus, the structures may comprise a plurality of bubble-like structures distributed along helical paths.
  • the regions of the dielectric material are discontinuous within one period of the helical structure .
  • Such an arrangement may be advantageous in enhancing coupling between polarisation modes.
  • the regions of the dielectric material are of a length that is less than ten times their diameter. More preferably, the regions of the dielectric material are of a length that is of the same order of magnitude as their diameter. The regions of the dielectric material may be at least approximately of the same length as their diameter.
  • a method of manufacturing a microstructured optical fibre comprising: (i) forming a preform arranged to form a core region and a cladding region in the fibre, the cladding region comprising a plurality of structures having a first refractive index and embedded in a solid matrix material having a second refractive index; (ii) heating the preform; and (iii) drawing the fibre from the preform; characterised in that the preform and fibre are rotated relative to each other during the drawing such that the structures in the cladding region of the drawn fibre extend helically along the drawn fibre.
  • the helical structures may be achieved by any suitable method. It may be that the preform is rotated and the fibre is not rotated. Alternatively, it may be that the fibre is rotated and the preform is not rotated.
  • the preform and fibre are rotated relative to each other sufficiently quickly that the helical structures have a period that is sufficiently short that, in use, polarisation modes of light guided in the fibre are coupled to each other.
  • the preform and fibre are rotated relative to each other sufficiently quickly that the helical structures break up and become discontinuous along their respective helices.
  • the preform and fibre may be rotated relative to each other in the same sense throughout rotation. Alternatively, the sense of rotation may change during the draw.
  • the fibre is wound onto a drum as it is drawn. The fibre may be rotated by rotating the drum about the axis coincident with the fibre being wound onto it.
  • the fibre may be rotated by rotating a chuck holding the fibre and positioned upstream of the drum. It is possible to achieve higher rotation speeds by using a chuck that is rotated first in one direction and then in the other than by rotating the drum itself.
  • the method comprises the step of propagating an acoustic wave through the fibre and/or preform to enhance break-up of the helical structures into structures that are discontinuous along their respective helices .
  • the preform and fibre may be rotated relative to each other sufficiently slowly that the helical structures have a period that is sufficiently long that there is substantially no coupling between polarisation modes of the fibre.
  • the preform is formed from a bundle of rods and/or tubes .
  • Fig. 1 is (a) a side view of a fibre according to the invention, (b) a transverse cross-section through the fibre at the line A-A' and (c) a transverse cross-section through the fibre at the line B-B' .
  • Fig. 2 is a drawing tower for drawing the fibre of Fig. 1.
  • Fig. 3 is (a) a side view of another fibre according to the invention, (b) a transverse cross-section through the fibre at the line C-C and (c) a transverse cross-section through the fibre at the line D-D' .
  • Fig. 4 is (a) a side view of a fibre according to the invention, (b) a transverse cross-section through the fibre at the line E-E' and (c) a transverse cross-section through the fibre at the line F-F' .
  • An example of a fibre 10 according to the invention comprises (Fig. 1) a cladding region 15 and a core region 40, the core region lying along the central longitudinal axis of the fibre 10.
  • the cladding region 15 comprises a plurality of elongate holes 30 embedded in a silica matrix 20 (only six holes 30 are shown in Fig. 1(a), for ease of illustration) .
  • Each hole 30 extends in a helix that rotates around the longitudinal axis of the fibre 10.
  • any transverse cross section e.g. Figs 1(b) and (c) )
  • holes 30 are arranged in the same position relative to the core 40, but the arrangement rotates gradually along the length of the fibre; thus the arrangement in Fig. 1(c) is rotated by 90 degrees with respect to the arrangement in Fig. 1(b) .
  • the helical structure of the holes is sinusoidal in side view (Fig. 1(a)) and has a period P of 10 cm.
  • Fibre 10 is drawn on a standard drawing tower 50 of the type used to draw standard telecomms fibre (Fig. 2(a)) .
  • Fibre 10 is drawn from preform 60, which has a diameter of about 20 mm and which comprises a bundle of silica canes and silica tubes which are fused together by heating. (The central holes of the tubes form holes 30 in fibre 10.)
  • the drawn fibre 10 has a diameter of about 100 microns.
  • the fibre 10 is drawn in the usual way from preform 60, except that the preform 60 is spun during drawing to twist holes 30 into their helical structure.
  • Preform 60 is heated at its end by furnace 70 to soften the silica and a fibre is drawn in the usual way onto a drum 80 that is rotated by a motor at a speed approximately 40000 times faster than the rate at which the preform is fed downwards. Simultaneously, preform 60 is rotated by motor 90 to twist fibre 10 where it is drawn from preform 60.
  • the helical structure sets in fibre 10 as each part of the twist moves away form furnace 70 and cools.
  • Fibre 10 is a photonic crystal fibre. As a result of the drawing process, in any transverse cross-section, fibre 10 is two-fold rotationally symmetric about core 40. If holes 30 were not helical, fibre 10 would therefore exhibit significant birefringence; that is, there would be a ⁇ fast' axis along which light would see a lowest effective refractive index and a ⁇ slow' axis, orthogonal to the fast axis, along which light would see a highest refractive index. The beat length of that birefringence would be of the order of 1 mm.
  • the helical structure of holes 30 has a period of 10 cm. The period of the helix of holes 30 is therefore very much larger than the beat length of the birefringence.
  • the fast and slow axes therefore rotate with the twisting holes 30 along the length of the fibre; for example, at B-B' , the fast and slow axes have rotated by 90 degrees from their position at A-A' .
  • drum 80 is mounted on a rotatable stage 100 and stage 100 is rotated such that the fibre 10 is wound onto the drum 100 at the axis of rotation of stage 100.
  • rotatable chuck 105 is provided between drum 80 and furnace 70.
  • a helical hole structure is achieved in fibre 10 by rotating chuck 105 alternately in a clockwise and an anti- clockwise direction. There is no need to rotate drum 80, which enables higher rotation speeds to be achieved.
  • fibre 110 again comprises a cladding region 115 and a core region 140, the core region lying along the central longitudinal axis of the fibre 110.
  • the cladding region 115 again comprises a plurality of elongate holes 130 embedded in a silica matrix 120.
  • the fibre is again drawn from a rotating preform and so each hole 130 again extends in a helix that rotates around the longitudinal axis of the fibre 110 and again in any transverse cross section (e.g. Figs. 3(b) and (c) ) , holes 130 are arranged in the same position relative to the core 140, but the arrangement rotates along the length of the fibre 110.
  • the helical structure of the holes 130 has a much shorter period, being 100 microns, than the period of holes 30 in fibre 10. The shorter period results from fibre 110 being spun at a much higher speed.
  • fibre 210 again comprises a cladding region 215 and a core region 240, the core region lying along the central longitudinal axis of the fibre 210.
  • the cladding region 215 comprises a plurality of short bubble-like cavities 230 embedded in a silica matrix 220.
  • Each cavity 230 is again of approximately circular cross- section in a plane transverse to the longitudinal axis of fibre 210 but is of a length that is of a similar order of magnitude to the cavity's diameter.
  • Cavities 230 are arranged along a set of helices that rotate around the longitudinal axis of the fibre 210. Thus, cavities 230 form discontinuous helices about the fibre axis.
  • cavities 230 are arranged in an arrangement similar to that of holes 30 and 130 and that arrangement again rotates along the fibre as one moves from E-E' to F-F' . However, there are no parts of cavities 230 visible in some transverse cross-sections (e.g. Fig.
  • Cavities 230 are formed in fibre 210 using the apparatus of Fig. 2(c) .
  • the fibre 210 is rotated by rotation of chuck 105 at a very high speed, alternately clockwise and then anti-clockwise.
  • the holes at the centres of the tubes forming the preform bundle break up into small cavities 230 rather than remaining intact as elongate holes, such as holes 30, 130.
  • the break up of the holes may be encouraged by passing along the preform an acoustic wave of a wavelength similar to the length of cavities 230 desired (i.e. by vibrating the fibre or preform at an appropriate frequency) .
  • the short length of cavities 230 results in stronger coupling between polarisation modes of the fibre 210.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

L'invention concerne une fibre optique microstructurée (10) comprenant une zone noyau (40) et une zone gaine (15). Ladite zone gaine (15) comprend une pluralité de structures (30) qui présentent un premier index de réfraction et qui sont intégrées dans une matière de matrice solide (20) présentant un second index de réfraction différent. Lesdites structures (30) sont hélicoïdales le long de la fibre (10).
PCT/GB2003/000066 2002-01-11 2003-01-10 Procede et appareil concernant des fibres optiques microstructurees WO2003058309A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003201650A AU2003201650A1 (en) 2002-01-11 2003-01-10 A method and apparatus relating to microstructured optical fibres

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
GB0200603.9 2002-01-11
GB0200603A GB0200603D0 (en) 2002-01-11 2002-01-11 Optical-fibre devices
GB0207240A GB0207240D0 (en) 2002-03-27 2002-03-27 A method an apparatus relating to microstructured optical fibres
GB0207240.3 2002-03-27
GB0210933.8 2002-05-13
GB0210933A GB0210933D0 (en) 2002-05-13 2002-05-13 A dispersion-compensating optical fibre

Publications (1)

Publication Number Publication Date
WO2003058309A1 true WO2003058309A1 (fr) 2003-07-17

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PCT/GB2003/000060 WO2003058308A2 (fr) 2002-01-11 2003-01-10 Fibres optiques birefringentes

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WO2007103115A3 (fr) * 2006-03-02 2007-10-25 Univ Leland Stanford Junior Dispositif de commande de la polarisation utilisant une fibre a bande interdite photonique et noyau creux
EP2376958A4 (fr) * 2008-12-18 2012-07-04 Chiral Photonics Inc Réseau de diffraction à fibre optique
US8215129B2 (en) 2002-03-20 2012-07-10 Nkt Photonics A/S Method of drawing microstructured glass optical fibers from a preform, and a preform combined with a connector
WO2012148746A1 (fr) * 2011-04-29 2012-11-01 Corning Incorporated Fibres diffusant la lumière et procédés pour leur réalisation
WO2013007380A3 (fr) * 2011-07-10 2013-04-04 Fiberware Generalunternehmen für Nachrichtentechnik GmbH Procede de fabrication d'une préforme et préforme destinée à l'étirage d'une fibre optique microstructurée
CN109912193A (zh) * 2019-03-19 2019-06-21 中国电力科学研究院有限公司 光子晶体光纤及其制备方法
US11175449B2 (en) * 2019-01-02 2021-11-16 Lumentum Operations Llc Optical fiber with variable absorption
CN115014318A (zh) * 2022-08-08 2022-09-06 中国船舶重工集团公司第七0七研究所 一种空芯微结构光纤陀螺
US11808970B2 (en) 2019-01-02 2023-11-07 Lumentum Operations Llc Optical fiber with variable absorption
US20230359102A1 (en) * 2020-04-27 2023-11-09 Nkt Photonics A/S Optical source and supercontinuum light generation apparatus

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US8965164B2 (en) 2006-03-02 2015-02-24 The Board Of Trustees Of The Leland Stanford Junior University Optical device using a hollow-core photonic-bandgap fiber
US7620283B2 (en) 2006-03-02 2009-11-17 The Board Of Trustees Of The Leland Stanford Junior University Optical device using a hollow-core photonic bandgap fiber
US7430345B2 (en) 2006-03-02 2008-09-30 The Board Of Trustees Of The Leland Stanford Junior University Polarization controller using a hollow-core photonic-bandgap fiber
WO2007103115A3 (fr) * 2006-03-02 2007-10-25 Univ Leland Stanford Junior Dispositif de commande de la polarisation utilisant une fibre a bande interdite photonique et noyau creux
EP2376958A4 (fr) * 2008-12-18 2012-07-04 Chiral Photonics Inc Réseau de diffraction à fibre optique
US10481324B2 (en) 2008-12-18 2019-11-19 Chiral Photonics, Inc. Fiber optic diffraction grating
WO2012148746A1 (fr) * 2011-04-29 2012-11-01 Corning Incorporated Fibres diffusant la lumière et procédés pour leur réalisation
US8620125B2 (en) 2011-04-29 2013-12-31 Corning Incorporated Light diffusing fibers and methods for making the same
WO2013007380A3 (fr) * 2011-07-10 2013-04-04 Fiberware Generalunternehmen für Nachrichtentechnik GmbH Procede de fabrication d'une préforme et préforme destinée à l'étirage d'une fibre optique microstructurée
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US11808970B2 (en) 2019-01-02 2023-11-07 Lumentum Operations Llc Optical fiber with variable absorption
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US20230359102A1 (en) * 2020-04-27 2023-11-09 Nkt Photonics A/S Optical source and supercontinuum light generation apparatus
US12210266B2 (en) * 2020-04-27 2025-01-28 Nkt Photonics A/S Optical source and supercontinuum light generation apparatus
CN115014318A (zh) * 2022-08-08 2022-09-06 中国船舶重工集团公司第七0七研究所 一种空芯微结构光纤陀螺
CN115014318B (zh) * 2022-08-08 2022-10-11 中国船舶重工集团公司第七0七研究所 一种空芯微结构光纤陀螺

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