JPS5635104A - Optical fiber branching filter - Google Patents

Optical fiber branching filter

Info

Publication number
JPS5635104A
JPS5635104A JP11115779A JP11115779A JPS5635104A JP S5635104 A JPS5635104 A JP S5635104A JP 11115779 A JP11115779 A JP 11115779A JP 11115779 A JP11115779 A JP 11115779A JP S5635104 A JPS5635104 A JP S5635104A
Authority
JP
Japan
Prior art keywords
fiber
light
dielectric films
multilayer dielectric
wavelength
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.)
Pending
Application number
JP11115779A
Other languages
Japanese (ja)
Inventor
Eizo Miyauchi
Takeo Iwama
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 JP11115779A priority Critical patent/JPS5635104A/en
Publication of JPS5635104A publication Critical patent/JPS5635104A/en
Pending 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
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29346—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by wave or beam interference
    • G02B6/29361—Interference filters, e.g. multilayer coatings, thin film filters, dichroic splitters or mirrors based on multilayers, WDM filters
    • G02B6/29368—Light guide comprising the filter, e.g. filter deposited on a fibre end

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

PURPOSE:To make the construction of a branching function part smaller and simpler by constituting the optical guides comprising three terminals of a Y shape of <=45 deg. in the angle assumed by the two terminals optically with the fibers alone. CONSTITUTION:The end face of an optical fiber 1 is polished by having inclination of <=22.5 deg. and is evaporation deposited thereon with multilayer dielectric films 4 provided with such optical characteristics that reflect the light of a wavelength lambda1 and allow the transmission of the light of a wavelength lambda2. The light of the wavelength lambda2 of the light waves of the wavelengths lambda1 and lambda2 having propagated in the fiber 1 transmits through the multilayer dielectric films 4a evaporation deposited on the slope of the fiber 1 and the light of the wavelength lambda1 is reflected thereby. The light waves of the wavelength lambda2 having transmitted through the multilayer dielectric films 4a of the fiber 4 transmit through the multilayer dielectric films 4b deposited on the end face of a fiber 2 and are coupled to the fiber 2. The light wave of the wavelength lambda1 having been reflected by the multilayer dielectric films 4a transmit through the multilayer dielectric films 5 deposited on the end face of a fiber 3 and are coupled to the fiber 3. In this way, the construction of the branching function part is made simpler and smaller.
JP11115779A 1979-08-31 1979-08-31 Optical fiber branching filter Pending JPS5635104A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11115779A JPS5635104A (en) 1979-08-31 1979-08-31 Optical fiber branching filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11115779A JPS5635104A (en) 1979-08-31 1979-08-31 Optical fiber branching filter

Publications (1)

Publication Number Publication Date
JPS5635104A true JPS5635104A (en) 1981-04-07

Family

ID=14553914

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11115779A Pending JPS5635104A (en) 1979-08-31 1979-08-31 Optical fiber branching filter

Country Status (1)

Country Link
JP (1) JPS5635104A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58211733A (en) * 1982-06-04 1983-12-09 Fujikura Ltd Multiplexer and demultiplexer for light signal
JPS6080805A (en) * 1983-10-11 1985-05-08 Takashi Mori Artificial light source device
JPS6298305A (en) * 1985-10-25 1987-05-07 Nippon Telegr & Teleph Corp <Ntt> Waveguide type optical multiplexing and demultiplexing circuit
EP0271177A2 (en) * 1986-08-01 1988-06-15 Spectran Specialty Optics Company Optical fibre coupler

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58211733A (en) * 1982-06-04 1983-12-09 Fujikura Ltd Multiplexer and demultiplexer for light signal
JPS6080805A (en) * 1983-10-11 1985-05-08 Takashi Mori Artificial light source device
JPS6298305A (en) * 1985-10-25 1987-05-07 Nippon Telegr & Teleph Corp <Ntt> Waveguide type optical multiplexing and demultiplexing circuit
EP0271177A2 (en) * 1986-08-01 1988-06-15 Spectran Specialty Optics Company Optical fibre coupler
EP0271177B1 (en) * 1986-08-01 1996-01-10 Spectran Specialty Optics Company Optical fibre coupler

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