WO2005100274A1 - Processus de production de fibre optique et fibre optique - Google Patents

Processus de production de fibre optique et fibre optique Download PDF

Info

Publication number
WO2005100274A1
WO2005100274A1 PCT/JP2004/005034 JP2004005034W WO2005100274A1 WO 2005100274 A1 WO2005100274 A1 WO 2005100274A1 JP 2004005034 W JP2004005034 W JP 2004005034W WO 2005100274 A1 WO2005100274 A1 WO 2005100274A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical fiber
spin
pmd
spin profile
profile
Prior art date
Application number
PCT/JP2004/005034
Other languages
English (en)
Japanese (ja)
Inventor
Ryuichiro Goto
Shoji Tanigawa
Shoichiro Matsuo
Kuniharu Himeno
Original Assignee
Fujikura Ltd.
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 Fujikura Ltd. filed Critical Fujikura Ltd.
Priority to PCT/JP2004/005034 priority Critical patent/WO2005100274A1/fr
Publication of WO2005100274A1 publication Critical patent/WO2005100274A1/fr

Links

Classifications

    • 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
    • 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
    • C03B2203/19—Alternating positive/negative spins or twists
    • 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
    • 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
    • G02B6/10—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

Definitions

  • optical fiber manufacturing method optical fiber
  • the present invention relates to a method for manufacturing an optical fiber having a small polarization mode dispersion (PMD).
  • PMD small polarization mode dispersion
  • PMD polarization mode dispersion
  • Light propagating in an optical fiber can be separated into two orthogonally polarized components.
  • a difference occurs in the group velocity between the two eigenpolarization components, and these two eigenpolarization components The time delay difference between them is PMD.
  • PMD is proportional to the difference in group velocity of each eigenpolarization component.
  • Fiber PMD By changing the direction of rotation in the clockwise and counterclockwise directions with a constant period relative to the length direction of the optical fiber and twisting it, the change in the direction of the birefringent axis in the longitudinal direction increases. Fiber PMD can be reduced. Normally, the optical fiber is adjusted so that the function of the torsion angle ( ⁇ ) and the longitudinal direction (z) of the twist formed in the optical fiber (hereinafter referred to as the spin aperture file) has the sine waveform shown in FIG. The fiber is twisted.
  • the amount of twist to be applied is increased over the entire length of the optical fiber, and the spin processor having a large spin amplitude is used. A file must be formed.
  • the spin profile is represented by the following equation (1).
  • ⁇ (z) is the twist angle at the position z in the longitudinal direction of the optical fiber
  • ⁇ is the spin amplitude
  • f is. Is the center frequency
  • f m is the modulation frequency.
  • the PMD reduction coefficient is a value defined by the following equation (2), and determines whether the PMD of the optical fiber has been efficiently reduced by forming a spin profile on the optical fiber. Can be evaluated quantitatively.
  • the purpose of the invention of the present invention is that which has been made in view of the circumstances described above. . So light, that is, light light 1100 Bubble can not be twisted, but it is possible to reduce the MMDD.
  • the aim is to provide a method of manufacturing an optical fiber fiber that can be produced, and to provide and provide a small optical fiber fiber of PPMMDD. . .
  • One embodiment of the invention of the present application is a method for manufacturing and manufacturing a light-optical fiber Iibaba.
  • it is a method of manufacturing and manufacturing optical light fiber that gives twisting to optical light fiber, and it is introduced into optical light fiber. It is expressed by the number of functions of the inserted twisting angle (( ⁇ )) and the position ((zz)) in the direction of the long hand ⁇ .
  • the absolute differential of the differential value of the spired-pump-lof-air-air-irle (here, (( ⁇ ((zz))))) Value UU dd eezz dd zz
  • the optical fiber twist can be twisted such that the range is less than or equal to 11 oo %% or less of the total length of the optical fiber.
  • Another aspect of the invention of the present application is an optical fiber, which is introduced into an optical fiber. Angled twisting angle
  • Another embodiment of the invention of the present application is an optical fiber filter, wherein the above-mentioned spline pin profiler has a triangular wave shape. This is the number of peri-period-related functions of and. .
  • Another embodiment of the invention of the present application is a fiber optic fiber, wherein the above-mentioned spipin powder profile is expressed in terms of the number of pericycle functions.
  • the characteristic feature is that the period of the circulating period is shorter or shorter than the length of the optical fiber fiber.
  • Another embodiment of the invention of the present application is an optical fiber network, wherein The characteristic is that the amplitude is expressed by ⁇ / 2 (where xi is a natural number).
  • FIG. 1 is a diagram showing an example of a trapezoidal waveform spin profile.
  • Fig. 2 shows the relationship between ⁇ and the PMD reduction coefficient of an optical fiber that has the spin profile of Fig. 1 and the length range where the spin amount is 0 is 0, 10 and 20% of the total length.
  • FIG. 3 is a diagram showing an example of a triangular waveform spin profile.
  • FIG. 4 is a diagram showing the relationship between the PMD reduction coefficient and ⁇ of the optical fiber having the spin profile shown in FIG.
  • FIG. 5 is a diagram showing a spin profile and a PMD at each point in the longitudinal direction of the optical fiber having the spin profile shown in FIG.
  • FIG. 6 is a diagram showing ⁇ D at each point in the longitudinal direction of the optical fiber having the spin profile shown in FIG. 3 and the optical fiber having a spin profile of a sine wave.
  • FIG. 7 is a diagram showing the relationship between ⁇ and the PMD reduction coefficient of an optical fiber having the spin profile shown in FIG. 3 and having a spin period of 1 m.
  • FIG. S is a diagram showing the relationship between ⁇ and the PMD reduction coefficient of an optical fiber having the spin profile shown in FIG. 3 and having a spin period of 0.3 m.
  • FIG. 9 is a schematic view showing an example of a guide for an optical fiber drawing apparatus according to the present invention.
  • FIG. 10 is a diagram illustrating an example of a spin profile of a sine wave.
  • FIG. 11 is a diagram showing a pin profile and a PMD at each point in the longitudinal direction of the optical fiber having the spin profile shown in FIG.
  • FIG. 12 shows the relationship between the PMD reduction coefficient and ⁇ of the optical fiber having the spin profile shown in FIG.
  • FIG. 4 is a diagram illustrating a relationship between a coefficient and a spin amplitude.
  • an embodiment of the present invention will be described below with reference to the drawings.
  • the optical fiber in the process of melting and drawing an optical fiber preform into an optical fiber, the optical fiber is drawn while being twisted to form a twist in the optical fiber.
  • the derivative of this spin profile Is the maximum value of the absolute value of the differential value of the spin profile over the entire length (hereinafter, also called I dezd z I or the absolute value of the spin amount).
  • the spin profile formed on the optical fiber and its function and effect will be described in detail below based on the PMD evaluation result of the optical fiber on which the conventional sinusoidal spin profile is formed.
  • FIG. 10 is a diagram illustrating an example of a spin profile of a sine wave.
  • FIG. 11 is a diagram showing a spin profile and a PMD at each point in the longitudinal direction of the optical fiber having the spin profile shown in FIG.
  • the PMD has an optical fiber length of 100 m, has the spin profile shown in Fig. 10, and is divided into minute sections of 0.1 mm. Assuming this is the value calculated by simulation using the Jones Matritas method (IEEE Photonics Technology L.etteres, September 1992, Vol. 4, No. 9, p. 1066-1069).
  • PMD is a value calculated by a simulation of the above-mentioned Jones matrix method.
  • the spin profile ( ⁇ (z)) is represented by the following equation (3).
  • Equation (3) in the middle and specification, a represents the spin amplitude, P represents the spin period, and z represents the position in the longitudinal direction of the optical fiber.
  • P lm
  • a 19. 3 rad
  • beat length (hereinafter referred to as L b ) shows data of 10 m 1 ⁇ .
  • a L b a value used as an index representing the birefringence of the optical fiber refers to the propagation distance to the arbitrary polarization state incident on the optical fiber is a polarization state at the time of the incident again.
  • the difference ( ⁇ ) between L b and the propagation constant is expressed by the following equation (4).
  • the PMD sharply increases at a position in the longitudinal direction where I de / dz I force ⁇ dz I max is 5% or less.
  • FIG. 1 shows an example of a spin profile formed in the present embodiment.
  • This spin profile is a periodic function of the trapezoidal waveform, and the torsion angle ( ⁇ ( Z )) is constant in the sections (B and D) corresponding to the upper and lower bases of the trapezoid. This is the length range where the spin amount is 0.
  • the torsion angle ( ⁇ (z)) gradually increases counterclockwise when the fiber cross section is viewed from the front.
  • the torsion angle ( ⁇ (z)) gradually increases around fh.
  • the rotation direction of the torsion angle ( ⁇ ( Z )) may be clockwise in the plus direction and counterclockwise in the minus direction.
  • Fig. 2 shows the relationship between ⁇ and the PMD reduction coefficient of an optical fiber that has the spin profile of Fig. 1 and the length range where the spin amount is 0 is 0, 10, and 20% of the total length. is there.
  • an optical fiber having the spin profile shown in FIG. 1 and having a spin amount of 0% of the total length when the spin profile has a differential value of 0 means that the spin profile has a triangular waveform. It refers to what becomes a periodic function.
  • FIG. 3 is a diagram showing an example of a triangular waveform spin profile.
  • the length range in which the spin rate is 0 is not actually 0% but is extremely small, and is set to 0% in the present embodiment.
  • the PMD reduction coefficient is a value represented by the following equation (2).
  • a PMD reduction coefficient of 0.15 or less is always obtained when the ⁇ force is S5 rad or more.
  • the PMD reduction coefficient shows a maximum value, and the value is 0.15 or less.
  • the maximum value of the PMD reduction coefficient is more than 0.15 ⁇ : It is not always possible to obtain a PMD reduction factor of 0-15 or less.
  • ⁇ is less than 10 rad.// PMD reduction of 0.15 or less.
  • a maximum value of the coefficient is obtained, and a low PMD reduction coefficient can be observed.
  • max is 20% of the total length.
  • the maximum value of the PMD reduction coefficient is larger than 0.15, and a PMD reduction coefficient of 0.15 or less cannot be obtained.
  • the I de / dzi force SI ⁇ / ⁇ z I max was 5% or less.
  • the PMD reduction coefficient can be reduced even if ⁇ is as small as 10 rad.
  • the PMDfc decrement is as low as 0.15 or less.
  • the PMD can be reduced by adjusting the shape of the spin profile to satisfy the conditions described in fir, it is not necessary to increase the amount of torsion applied to the optical fiber over the entire length. PMD can be efficiently reduced with a minimum amount of twist, and optical fibers with small PMD can be manufactured. Because of this, relatively An optical fiber with a small PMD can be manufactured even under conditions of high drawing speed.
  • I dQ / dz I force SI ⁇ / dz Imax Optical fiber with a spin profile in which the length range that is 5% or less of the max is 10% or less of the total length is the PMD reduction coefficient as described above. Is less than 0.15, and the PMD is efficiently reduced. For example, the PMD can be reduced to a small value of about 0.1 ps / (km) 1.
  • the transmission speed of optical communication can be increased, and the ability to extend the transmission path can be realized.
  • the PMD can be reduced by adjusting the shape of the spin profile so as to satisfy the condition described in ft, so that it is not necessary to increase the spin amount over the entire length of the fiber, and the necessary minimum
  • the PMD can be reduced efficiently with the minimum spin amount, and an optical fiber with a small PMD can be manufactured.
  • An optical fiber with a small PMD can be manufactured even under the condition that the drawing speed is relatively high.
  • I-force SI ⁇ / dz has a spin profile in which the length range of less than 5% of ax is less than 10% of the total length. Is less than 0.15, and the PMD is efficiently reduced. For example, the PMD can be reduced to a small value of about 0.1 ps / (km) I.
  • the transmission speed of optical communication can be increased and the transmission path can be extended.
  • FIG. 4 is a diagram illustrating the relationship between ⁇ and the PMD reduction coefficient of an optical fiber having a spin profile of a triangular waveform periodic function.
  • FIG. 12 shows the relationship between ⁇ and the PMD reduction coefficient of an optical fiber having a sinusoidal spin profile as a comparison.
  • the optical fibers shown in FIGS. 4 and 12 are all spin fibers.
  • Spin cycle mouth file is lm
  • the case L b is 1 Om.
  • Fig. 6 is a diagram showing the PMD of each optical fiber whose spin profile has a triangular waveform periodic function and whose spin profile has a sinusoidal waveform. .
  • the optical fiber whose spin profile is a triangular waveform function is 1 ( ⁇ / dz I force S 1 dQ / dz I max.
  • the spin profile is a periodic function with a triangular waveform
  • max is 5% or less is extremely small. Therefore, the amount of increase in PMD in this range is smaller than the spin profile optical fiber shown in Fig. 6 compared to the sinusoidal optical fiber.
  • an optical fiber having a spin profile of a triangular waveform periodic function has an extremely small PMD.
  • a high-speed transmission system can be realized by using it as a transmission line.
  • P MD low attenuation coefficient of light off ⁇ I bar of L b is 5 m and 10 m it is approximately the same.
  • PMD reduction factor of fiber- ⁇ gamma bar of L b is 1 m contrast, L b is ⁇ or different and PMD reduction factor of 5m and 1 Om of the optical fiber.
  • ⁇ 0. 3m shown in FIG. 8
  • P MD reduction factor of L b is 1, 5, 1 0 m of the optical fiber is substantially the same, similarly to the valence results shown in Figure 7, when P is less than L b, it can be seen that the obtained PMD reduction factor is substantially the same.
  • a short optical fiber than P spin profile L b is obtained is substantially the same P MD reduction factor. For this reason, for example, by selectively using the above-mentioned optical fiber to form a transmission line, a transmission line in which PMD is efficiently reduced over the entire path can be realized, and stable optical characteristics can be obtained.
  • the minimum value S of the PMD reduction coefficient can be obtained by producing an optical fiber by introducing spins so that a of the spin profile becomes ⁇ / 2 ( ⁇ is a natural number), and more efficiently ⁇ ⁇ MD can be reduced.
  • the optical fiber having a spin profile in which a is ⁇ 2 ( ⁇ is a natural number) is efficiently reduced in PMD, and an extremely small PMD is obtained.
  • FIG. 9 is a schematic view showing an example of a guide section of the optical fiber drawing apparatus according to the present invention.
  • Reference numeral 1 denotes a guide roller for spin introduction, which is obtained by melting a preform of an optical fiber preform. The obtained optical fiber 2 comes into contact with the surface of the guide roller 1 for spin introduction.
  • the rotation axis of the guide roller 1 for spin introduction is in a direction perpendicular to the drawing direction of the optical fiber wire 2. Then, the optical fiber 2 can swing around one axis parallel to the spring drawing direction.
  • the optical fiber preform is heated by a spinning furnace and melted and drawn to form an optical fiber bare wire. . Then, it is passed through the guide roller 1 for spin introduction described above.
  • the rotation axis of the spin-introducing guide roller 1 is swung, and the optical fiber 2 is twisted by friction generated between the optical fiber 2 and the roller.
  • IdG / dz I force introduced into the optical fiber 2 by adjusting the swing angle of the rotation axis 2 ⁇ and the swing cycle, etc.SI ⁇ ⁇ / dz I max 5% or less of max Spin is introduced so that the range is less than 10% of the total length of the optical fiber.
  • the method of manufacturing the optical fiber is not limited to the method described above, and may be, for example, the method described in US Pat. No. 5,418,881. Industrial potential
  • the absolute value of the differential value of the spin profile is 5% or less of the maximum absolute value of the differential value of the spin profile over the entire length.
  • the length range in which the absolute value of the differential value of the spin profile is 5% or less of the maximum value of the absolute value of the differential value of the spin profile in the entire length is equal to or less than the total length of the optical fiber. It is 10% or less, whereby the PMD is efficiently reduced, and for example, the PMD can be reduced to a low level of about 0.1 lp sZ (km). Therefore, it is possible to increase the transmission speed of the optical communication and extend the transmission path.
  • the spin profile period shorter than the length of the optical fiber, PMD is efficiently reduced and an optical fiber with a small value is realized. it can.
  • the spin profile of the optical fiber can be a periodic function of a triangular waveform, or by setting the spin amplitude to ⁇ / 2 ( ⁇ is a natural number), an extremely small PMD can be realized.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

Un processus de production de fibre optique dans lequel la fibre optique est torsadée lorsque le matériau parent de la fibre optique est étiré par fusion, de sorte que la plage de longueurs dans laquelle la valeur différenciée absolue du profil de rotation arrive à 5% ou moins de la valeur maximum entre dans les 10% de la longueur générale de la fibre optique. La fibre optique est agencée de sorte que la plage de longueurs dans laquelle la valeur différenciée absolue du profil de rotation arrive à 5% ou moins de la valeur maximum entre dans les 10% de la longueur générale. Le profil de rotation est de préférence triangulaire. Sa période est, de préférence, plus courte que la longueur de battement de la fibre optique et l'amplitude de rotation est de préférence de nπ/2 (n étant un nombre naturel).
PCT/JP2004/005034 2004-04-07 2004-04-07 Processus de production de fibre optique et fibre optique WO2005100274A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2004/005034 WO2005100274A1 (fr) 2004-04-07 2004-04-07 Processus de production de fibre optique et fibre optique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2004/005034 WO2005100274A1 (fr) 2004-04-07 2004-04-07 Processus de production de fibre optique et fibre optique

Publications (1)

Publication Number Publication Date
WO2005100274A1 true WO2005100274A1 (fr) 2005-10-27

Family

ID=35149914

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2004/005034 WO2005100274A1 (fr) 2004-04-07 2004-04-07 Processus de production de fibre optique et fibre optique

Country Status (1)

Country Link
WO (1) WO2005100274A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2256527A1 (fr) * 2008-02-28 2010-12-01 Sumitomo Electric Industries, Ltd. Fibre optique

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0943443A (ja) * 1995-07-26 1997-02-14 Fujitsu Ltd 偏波分散の抑圧特性を持つ光ファイバ及びその製造方法
JPH10507438A (ja) * 1995-08-16 1998-07-21 プラズマ オプティカル ファイバー ベスローテン フェンノートシャップ 低偏光モード分散特性を持つ光ファイバ
JPH11501133A (ja) * 1995-12-20 1999-01-26 コーニング インコーポレイテッド 増幅器での偏光作用を低減するファイバ
JPH11508221A (ja) * 1996-01-22 1999-07-21 コーニング インコーポレイテッド 偏光モード分散を減少させるためにスピンを変調させた光ファイバ並びにその製造方法および装置
JP2002525647A (ja) * 1998-09-17 2002-08-13 コーニング インコーポレイテッド 光回路の円偏光ファイバ
WO2002063354A1 (fr) * 2001-01-30 2002-08-15 Sumitomo Electric Industries, Ltd. Procede et dispositif de fabrication de fibre optique
JP2004051483A (ja) * 2002-07-23 2004-02-19 Fitel Usa Corp 振幅および周波数調整ファイバ・スピン関数を使用して超低ｐｍｄ光ファイバを形成するシステムおよび方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0943443A (ja) * 1995-07-26 1997-02-14 Fujitsu Ltd 偏波分散の抑圧特性を持つ光ファイバ及びその製造方法
JPH10507438A (ja) * 1995-08-16 1998-07-21 プラズマ オプティカル ファイバー ベスローテン フェンノートシャップ 低偏光モード分散特性を持つ光ファイバ
JPH11501133A (ja) * 1995-12-20 1999-01-26 コーニング インコーポレイテッド 増幅器での偏光作用を低減するファイバ
JPH11508221A (ja) * 1996-01-22 1999-07-21 コーニング インコーポレイテッド 偏光モード分散を減少させるためにスピンを変調させた光ファイバ並びにその製造方法および装置
JP2002525647A (ja) * 1998-09-17 2002-08-13 コーニング インコーポレイテッド 光回路の円偏光ファイバ
WO2002063354A1 (fr) * 2001-01-30 2002-08-15 Sumitomo Electric Industries, Ltd. Procede et dispositif de fabrication de fibre optique
JP2004051483A (ja) * 2002-07-23 2004-02-19 Fitel Usa Corp 振幅および周波数調整ファイバ・スピン関数を使用して超低ｐｍｄ光ファイバを形成するシステムおよび方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2256527A1 (fr) * 2008-02-28 2010-12-01 Sumitomo Electric Industries, Ltd. Fibre optique
EP2256527A4 (fr) * 2008-02-28 2013-02-20 Sumitomo Electric Industries Fibre optique
US8483531B2 (en) 2008-02-28 2013-07-09 Sumitomo Electric Industries, Ltd. Optical fiber

Similar Documents

Publication Publication Date Title
JP3226283B2 (ja) 偏光モード分散を減少させるためにスピンを変調させた光ファイバ並びにその製造方法および装置
JP2568487B2 (ja) 光デバイス製造方法
JP4053947B2 (ja) 振幅および周波数調整ファイバ・スピン関数を使用して超低ｐｍｄ光ファイバを形成するシステムおよび方法
CN109073824B (zh) 耦合型多芯光纤以及包括耦合型多芯光纤的光传输系统
US20040232571A1 (en) Method for manufacturing low PMD single-mode fiber and optical fiber manufactured by the same
JP4974165B2 (ja) 光ファイバの接続構造の製造方法
JPH01237507A (ja) 絶対単一偏波光ファイバ
JP2012510643A (ja) 改良された屈折率プロファイルを有する多重モード光ファイバー
US20040022507A1 (en) Optical fibre with reduced polarization mode dispersion and method for obtaining an optical fibre with reduced polarization mode dispersion
JP4547848B2 (ja) 光ファイバ、その製造方法及びそれを含む光伝送システム
CN1959450A (zh) 适合高速大预制棒制造具有低偏振模色散单模光纤的方法
US20180088360A1 (en) Polarization Maintaining Optical Fiber With Non-Symmetric Stress Applying Parts
WO2005100274A1 (fr) Processus de production de fibre optique et fibre optique
US7861556B2 (en) Method and apparatus for impulsively spinning optical fiber
JP2004277217A (ja) 光ファイバの製造方法、光ファイバ
KR100808354B1 (ko) 저감된 편광모드분산을 갖는 단일모드 광섬유 및 그 제조 방법
US20240085618A1 (en) Polarization maintaining optical fiber and polarization maintaining optical fiber manufacturing method
JP2004123527A (ja) スピン振幅非対称制御を利用する光ファイバ線引き方法
JP2002228869A (ja) 光部品用光ファイバおよびその製造方法
JP2001051150A (ja) 偏波保持光ファイバカプラの製造方法
JP2855531B2 (ja) 石英ガラス系高強度光ファイバおよびその製造方法
US8233760B2 (en) Ultra low PMD fibers and method of making
KR100872235B1 (ko) 편광모드분산 저감을 위한 단일모드 광섬유의 인선방법 및이 방법에 의해 제조된 광섬유
JPS63143512A (ja) 単一モ−ドフツ化物ガラスフアイバ
JPH0350505A (ja) 単一偏波光ファイバ

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BW GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

WWW Wipo information: withdrawn in national office

Country of ref document: DE

122 Ep: pct application non-entry in european phase