JPS57158806A - Twisting optical line - Google Patents

Twisting optical line

Info

Publication number
JPS57158806A
JPS57158806A JP56045071A JP4507181A JPS57158806A JP S57158806 A JPS57158806 A JP S57158806A JP 56045071 A JP56045071 A JP 56045071A JP 4507181 A JP4507181 A JP 4507181A JP S57158806 A JPS57158806 A JP S57158806A
Authority
JP
Japan
Prior art keywords
lambda
line
optical line
twisting
preservability
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP56045071A
Other languages
Japanese (ja)
Other versions
JPS636841B2 (en
Inventor
Junichi Sakai
Susumu Machida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP56045071A priority Critical patent/JPS57158806A/en
Publication of JPS57158806A publication Critical patent/JPS57158806A/en
Publication of JPS636841B2 publication Critical patent/JPS636841B2/ja
Granted legal-status Critical Current

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
    • C03B37/10—Non-chemical treatment
    • C03B37/12—Non-chemical treatment of fibres or filaments during winding up
    • 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
    • C03B2203/18—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
    • C03B2203/30—Polarisation maintaining [PM], i.e. birefringent products, e.g. with elliptical core, by use of stress rods, "PANDA" type fibres
    • C03B2203/302—Non-circular core cross-sections
    • 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)

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

PURPOSE:To secure a stable polarization preservability for a long distance against disturbance and to facilitate the connection of optical lines, by twisting the optical line around the axis of the core. CONSTITUTION:When the difference in specific refractive index between a core part 1 and a clad part 2, the used wavelength, and the refractive index of the core part 1 corresponding to the used wavelength are denoted as DELTA=(n1-n2)/ n1, lambda(mum), and n1(lambda) respectively, the unit length of the optical line is twisted in the same direction (indicated by an arrow 3) in the proportion of phit0=2.8X10<5> (n1(lambda)DELTA<2>/lambda)[radian/m]or more. Concretely, a line 4, which is parallel with the axis (axis Z), and is indicated by a one-dot broken line, on the outside circumferential face of the optical line is changed to a spiral line 5 indicated by solid lines and broken lines by twisting the optical line. In respect to a pitch Pt of twisting, Pt=2pi/phit is true. Thus, the preservability of linear polarization components is improved, and the preservability of circular polarization components is realized.
JP56045071A 1981-03-27 1981-03-27 Twisting optical line Granted JPS57158806A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56045071A JPS57158806A (en) 1981-03-27 1981-03-27 Twisting optical line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56045071A JPS57158806A (en) 1981-03-27 1981-03-27 Twisting optical line

Publications (2)

Publication Number Publication Date
JPS57158806A true JPS57158806A (en) 1982-09-30
JPS636841B2 JPS636841B2 (en) 1988-02-12

Family

ID=12709105

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56045071A Granted JPS57158806A (en) 1981-03-27 1981-03-27 Twisting optical line

Country Status (1)

Country Link
JP (1) JPS57158806A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59135402A (en) * 1983-01-24 1984-08-03 Nippon Telegr & Teleph Corp <Ntt> Single polarization optical fiber
JPS60125821A (en) * 1983-12-12 1985-07-05 Fujitsu Ltd Adjusting device for angle of polarization
EP0630865A1 (en) * 1993-06-22 1994-12-28 Sumitomo Electric Industries, Limited Optical fiber preform, optical fiber and their manufacturing methods
WO2001035132A1 (en) * 1999-11-08 2001-05-17 Sumitomo Electric Industries, Ltd. Optical fiber, method for manufacturing same, and optical transmission system comprising the same
JP2020021088A (en) * 2017-06-06 2020-02-06 タツタ電線株式会社 Optical fiber coupler
US11275216B2 (en) 2017-06-06 2022-03-15 Tatsuta Electric Wire & Cable Co., Ltd. Optical fiber coupler

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02179716A (en) * 1988-12-29 1990-07-12 Hashimoto Forming Ind Co Ltd Manufacture of vertically moving window for automobile

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59135402A (en) * 1983-01-24 1984-08-03 Nippon Telegr & Teleph Corp <Ntt> Single polarization optical fiber
JPS60125821A (en) * 1983-12-12 1985-07-05 Fujitsu Ltd Adjusting device for angle of polarization
JPH0459612B2 (en) * 1983-12-12 1992-09-22 Fujitsu Ltd
EP0630865A1 (en) * 1993-06-22 1994-12-28 Sumitomo Electric Industries, Limited Optical fiber preform, optical fiber and their manufacturing methods
WO2001035132A1 (en) * 1999-11-08 2001-05-17 Sumitomo Electric Industries, Ltd. Optical fiber, method for manufacturing same, and optical transmission system comprising the same
US6567597B2 (en) 1999-11-08 2003-05-20 Sumitomo Electric Industries, Ltd. Optical fiber, method of making the same, and optical transmission system including the same
JP4547848B2 (en) * 1999-11-08 2010-09-22 住友電気工業株式会社 Optical fiber, method for manufacturing the same, and optical transmission system including the same
JP2020021088A (en) * 2017-06-06 2020-02-06 タツタ電線株式会社 Optical fiber coupler
US11275216B2 (en) 2017-06-06 2022-03-15 Tatsuta Electric Wire & Cable Co., Ltd. Optical fiber coupler

Also Published As

Publication number Publication date
JPS636841B2 (en) 1988-02-12

Similar Documents

Publication Publication Date Title
GB1521541A (en) Optical fibre transmission media
EP0334247A3 (en) Single mode bend insensitive fiber for use in fiber optic guidance applications
AU584609B2 (en) Polarization locked optical fiber and method
EP0204493A3 (en) Fibre optic coupler
JPS57158806A (en) Twisting optical line
EP0227366A3 (en) Optical fibres
ES2001264A6 (en) Circularly birefringent dielectric waveguide.
JPS57188005A (en) Forming method of optical fiber end face of optical connector and said optical connector
JPS5535347A (en) Optical fiber splicer
JPS56112621A (en) Optical detecting device for temperature
ATE114077T1 (en) WAVEGUIDE TWIST.
JPS5699306A (en) Single mode optical fiber which preserves plane of polarization
FR2441858A1 (en) Mono or multi-mode optical fibre - has central monomode core with multimode sheath esp. for data transmission
JPS58214108A (en) Optical fiber
JPS5635106A (en) Optical fiber coupler
JPS5337438A (en) Optical mode filter
JPS5233545A (en) Light coupler
JPS5518641A (en) Optical fiber branching and connecting part
JPS55115010A (en) Construction of optical fiber
EP0171271A3 (en) Improvements relating to optical fibres
JPS5746218A (en) Optical fiber connecting part having directional property
JPS574005A (en) Optical distributor
JPS57185407A (en) Connecting part of optical fiber for single mode transmission
JPS5672403A (en) Polarizer
JPS5443749A (en) Wide range oprical fiber