JPS5685702A - Variable attenuator - Google Patents

Variable attenuator

Info

Publication number
JPS5685702A
JPS5685702A JP16249779A JP16249779A JPS5685702A JP S5685702 A JPS5685702 A JP S5685702A JP 16249779 A JP16249779 A JP 16249779A JP 16249779 A JP16249779 A JP 16249779A JP S5685702 A JPS5685702 A JP S5685702A
Authority
JP
Japan
Prior art keywords
core
clad
light signal
optical fibers
light
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
JP16249779A
Other languages
Japanese (ja)
Other versions
JPS6213642B2 (en
Inventor
Shigefumi Masuda
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP16249779A priority Critical patent/JPS5685702A/en
Publication of JPS5685702A publication Critical patent/JPS5685702A/en
Publication of JPS6213642B2 publication Critical patent/JPS6213642B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/264—Optical coupling means with optical elements between opposed fibre ends which perform a function other than beam splitting
    • G02B6/266—Optical coupling means with optical elements between opposed fibre ends which perform a function other than beam splitting the optical element being an attenuator

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)

Abstract

PURPOSE:To remove the light signal components leaking to core parts from clad parts by providing light shielding films having an opening at least on the core part surface to the end faces of a pair of opposing optical fibers. CONSTITUTION:Light shielding films 13 composed of aluminum are stuck on the end faces of optical fibers 12 consisting of cores 4 and clads 6, and the core 4 part surfaces thereof are selectively removed to form openings 14. The light component 7 going toward the clad part 16 of the receiving side optical fiber 12 out of the light signal emitted from the transmission side optical fiber 11 of the optical fibers formed in this way is shaded by the films 13 and will not therefore enter the clad 6. Hence, the light signal component 5 having entered the core 4 receives no disturbance at all; therefore, the rate of atenuation does not fluctuate and linearly increases with an increase in the distance L between the fibers 11 and 12.
JP16249779A 1979-12-14 1979-12-14 Variable attenuator Granted JPS5685702A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16249779A JPS5685702A (en) 1979-12-14 1979-12-14 Variable attenuator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16249779A JPS5685702A (en) 1979-12-14 1979-12-14 Variable attenuator

Publications (2)

Publication Number Publication Date
JPS5685702A true JPS5685702A (en) 1981-07-13
JPS6213642B2 JPS6213642B2 (en) 1987-03-27

Family

ID=15755738

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16249779A Granted JPS5685702A (en) 1979-12-14 1979-12-14 Variable attenuator

Country Status (1)

Country Link
JP (1) JPS5685702A (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2533323A1 (en) * 1982-09-17 1984-03-23 Thomson Csf Variable optical attenuator device.
JPS60133413A (en) * 1983-12-21 1985-07-16 Matsushita Electric Ind Co Ltd Optical attenuator
JPS60173908U (en) * 1984-04-27 1985-11-18 日立電線株式会社 Cladding mode elimination polarization preserving optical fiber
JPH01255803A (en) * 1988-04-06 1989-10-12 Nec Corp Optical fixed attenuator
US5050956A (en) * 1990-09-20 1991-09-24 Hunter Associates Laboratory Inc. Optical fiber attenuator and connecting element
US6490391B1 (en) 2000-07-12 2002-12-03 Oluma, Inc. Devices based on fibers engaged to substrates with grooves
US6501875B2 (en) 2000-06-27 2002-12-31 Oluma, Inc. Mach-Zehnder inteferometers and applications based on evanescent coupling through side-polished fiber coupling ports
US6516114B2 (en) 2000-06-27 2003-02-04 Oluma, Inc. Integration of fibers on substrates fabricated with grooves
US6542663B1 (en) 2000-09-07 2003-04-01 Oluma, Inc. Coupling control in side-polished fiber devices
US6571035B1 (en) 2000-08-10 2003-05-27 Oluma, Inc. Fiber optical switches based on optical evanescent coupling between two fibers
US6597833B1 (en) 2000-06-27 2003-07-22 Oluma, Inc. Wavelength-division multiplexers and demultiplexers based on mach-zehnder interferometers and evanescent coupling
US6621951B1 (en) 2000-06-27 2003-09-16 Oluma, Inc. Thin film structures in devices with a fiber on a substrate
US6621952B1 (en) 2000-08-10 2003-09-16 Oluma, Inc. In-fiber variable optical attenuators and modulators using index-changing liquid media
US6625349B2 (en) 2000-06-27 2003-09-23 Oluma, Inc. Evanescent optical coupling between a waveguide formed on a substrate and a side-polished fiber
WO2004019087A3 (en) * 2002-08-23 2006-05-11 Avanex Uk Ltd A variable optical attenuator
DE102022206728A1 (en) 2022-06-30 2024-01-04 Micro-Epsilon Optronic Gmbh Device for conducting measuring light to be spectrally analyzed and method for producing such a device and device for measuring distance and thickness

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2533323A1 (en) * 1982-09-17 1984-03-23 Thomson Csf Variable optical attenuator device.
JPS60133413A (en) * 1983-12-21 1985-07-16 Matsushita Electric Ind Co Ltd Optical attenuator
JPS60173908U (en) * 1984-04-27 1985-11-18 日立電線株式会社 Cladding mode elimination polarization preserving optical fiber
JPH01255803A (en) * 1988-04-06 1989-10-12 Nec Corp Optical fixed attenuator
US5050956A (en) * 1990-09-20 1991-09-24 Hunter Associates Laboratory Inc. Optical fiber attenuator and connecting element
US6621951B1 (en) 2000-06-27 2003-09-16 Oluma, Inc. Thin film structures in devices with a fiber on a substrate
US6501875B2 (en) 2000-06-27 2002-12-31 Oluma, Inc. Mach-Zehnder inteferometers and applications based on evanescent coupling through side-polished fiber coupling ports
US6516114B2 (en) 2000-06-27 2003-02-04 Oluma, Inc. Integration of fibers on substrates fabricated with grooves
US6556746B1 (en) 2000-06-27 2003-04-29 Oluma, Inc. Integrated fiber devices based on Mach-Zehnder interferometers and evanescent optical coupling
US6597833B1 (en) 2000-06-27 2003-07-22 Oluma, Inc. Wavelength-division multiplexers and demultiplexers based on mach-zehnder interferometers and evanescent coupling
US6625349B2 (en) 2000-06-27 2003-09-23 Oluma, Inc. Evanescent optical coupling between a waveguide formed on a substrate and a side-polished fiber
US6490391B1 (en) 2000-07-12 2002-12-03 Oluma, Inc. Devices based on fibers engaged to substrates with grooves
US6690857B2 (en) 2000-07-12 2004-02-10 Oluma, Inc. Fiber devices having side evanescent coupling port
US6571035B1 (en) 2000-08-10 2003-05-27 Oluma, Inc. Fiber optical switches based on optical evanescent coupling between two fibers
US6621952B1 (en) 2000-08-10 2003-09-16 Oluma, Inc. In-fiber variable optical attenuators and modulators using index-changing liquid media
US6542663B1 (en) 2000-09-07 2003-04-01 Oluma, Inc. Coupling control in side-polished fiber devices
WO2004019087A3 (en) * 2002-08-23 2006-05-11 Avanex Uk Ltd A variable optical attenuator
DE102022206728A1 (en) 2022-06-30 2024-01-04 Micro-Epsilon Optronic Gmbh Device for conducting measuring light to be spectrally analyzed and method for producing such a device and device for measuring distance and thickness

Also Published As

Publication number Publication date
JPS6213642B2 (en) 1987-03-27

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