JPS561001A - Optical fiber diffusion delay equalizer - Google Patents

Optical fiber diffusion delay equalizer

Info

Publication number
JPS561001A
JPS561001A JP7518079A JP7518079A JPS561001A JP S561001 A JPS561001 A JP S561001A JP 7518079 A JP7518079 A JP 7518079A JP 7518079 A JP7518079 A JP 7518079A JP S561001 A JPS561001 A JP S561001A
Authority
JP
Japan
Prior art keywords
lambdai
wavelength
optical
light
guides
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
JP7518079A
Other languages
Japanese (ja)
Other versions
JPS574881B2 (en
Inventor
Nobuyuki Imoto
Haruhiko Tsuchiya
Tatsuo Izawa
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 JP7518079A priority Critical patent/JPS561001A/en
Publication of JPS561001A publication Critical patent/JPS561001A/en
Publication of JPS574881B2 publication Critical patent/JPS574881B2/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
    • G02B6/27—Optical coupling means with polarisation selective and adjusting means
    • G02B6/2706—Optical coupling means with polarisation selective and adjusting means as bulk elements, i.e. free space arrangements external to a light guide, e.g. polarising beam splitters
    • G02B6/2713—Optical coupling means with polarisation selective and adjusting means as bulk elements, i.e. free space arrangements external to a light guide, e.g. polarising beam splitters cascade of polarisation selective or adjusting operations
    • 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
    • G02B6/29362—Serial cascade of filters or filtering operations, e.g. for a large number of channels
    • G02B6/29364—Cascading by a light guide path between filters or filtering operations, e.g. fibre interconnected single filter modules
    • 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
    • G02B6/29371—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 principle based on material dispersion
    • G02B6/29374—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 principle based on material dispersion in an optical light guide
    • G02B6/29376—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 principle based on material dispersion in an optical light guide coupling light guides for controlling wavelength dispersion, e.g. by concatenation of two light guides having different dispersion properties
    • 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
    • G02B6/29379—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 characterised by the function or use of the complete device
    • G02B6/29392—Controlling dispersion
    • G02B6/29394—Compensating wavelength dispersion

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Integrated Circuits (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To make the device simple and small in size and decrease the insertion loss of the equalizer by connecting the guides of the specified length longitudinally in correspondence to the wavelength lambdai of light waves, providing the specific reflecting films of the central wavelength lambdai at their connection faces, and fetching the light reflected by each reflecting film to the outside from the same optical path. CONSTITUTION:Light from an optical fiber 1 is passed through a polarizing and separating prism 11 such as Rochon prism and a 1/4 wavelength plate 12 and is thereby made into the circularly polarized wave which is then led to the diffusion delay portion consisting of wavelength selective reflecting films 13-1-13-N and optical guides 14-1-14-(N-1). The length of the delay optical guide for the wavelength lambdai is made li=LS(lambdai-lambdai+1)c/2n and the resolving power of the reflecting films having a center at lambda1 is made about (lambdai-lambdai+1)/2. Here, L, is the length of the optical guides, S is their wavelength diffusion, (n) is refractive index and (c) is the velocity of light. The light reflected by each reflecting film passes the route in the direction opposite from that at the time of incidence and is led to the outside by way of the optical guide 5. This diffusion delay equalizer is simple, small in size and has less losses.
JP7518079A 1979-06-16 1979-06-16 Optical fiber diffusion delay equalizer Granted JPS561001A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7518079A JPS561001A (en) 1979-06-16 1979-06-16 Optical fiber diffusion delay equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7518079A JPS561001A (en) 1979-06-16 1979-06-16 Optical fiber diffusion delay equalizer

Publications (2)

Publication Number Publication Date
JPS561001A true JPS561001A (en) 1981-01-08
JPS574881B2 JPS574881B2 (en) 1982-01-28

Family

ID=13568741

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7518079A Granted JPS561001A (en) 1979-06-16 1979-06-16 Optical fiber diffusion delay equalizer

Country Status (1)

Country Link
JP (1) JPS561001A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6138908A (en) * 1984-07-11 1986-02-25 エステイーシー・ピーエルシー Optical fiber transmission system
US5570439A (en) * 1993-01-19 1996-10-29 Hitachi, Ltd. Optical waveguide device and optical transmission system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6030696U (en) * 1983-08-03 1985-03-01 井上　卓也 speaker

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6138908A (en) * 1984-07-11 1986-02-25 エステイーシー・ピーエルシー Optical fiber transmission system
JPH057683B2 (en) * 1984-07-11 1993-01-29 Stc Plc
US5570439A (en) * 1993-01-19 1996-10-29 Hitachi, Ltd. Optical waveguide device and optical transmission system

Also Published As

Publication number Publication date
JPS574881B2 (en) 1982-01-28

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