JPS5752004A - Optical mixing and branching circuit - Google Patents

Optical mixing and branching circuit

Info

Publication number
JPS5752004A
JPS5752004A JP12601980A JP12601980A JPS5752004A JP S5752004 A JPS5752004 A JP S5752004A JP 12601980 A JP12601980 A JP 12601980A JP 12601980 A JP12601980 A JP 12601980A JP S5752004 A JPS5752004 A JP S5752004A
Authority
JP
Japan
Prior art keywords
input
light
length
side waveguides
end surface
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
JP12601980A
Other languages
Japanese (ja)
Inventor
Nobuyuki Imoto
Nobuo Shimizu
Masahiro Ikeda
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.)
NTT Inc
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 JP12601980A priority Critical patent/JPS5752004A/en
Publication of JPS5752004A publication Critical patent/JPS5752004A/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
    • G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
    • G02B6/2808—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using a mixing element which evenly distributes an input signal over a number of outputs

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Integrated Circuits (AREA)

Abstract

PURPOSE:To reduce insertion loss by coupling an input part consisting of light emission surfaces of several input-side waveguides arranged widthwise in a body and by determining the length in the traveling direction of light within a prescribed range. CONSTITUTION:A circuit is provided with an input part consisting of light emission surfaces of (m)-number of input-side waveguides arranged widthwise in one body, a waveguide part which while coupled with the input part, has an (m)-by-(w) width end surface, length L in the traveling direction of light, and uniform refractivity, and an output part which while coupled with the (m)-by-(w) width end surface of the waveguide part, branches into (m)-number of output-side waveguides having width (w). Then, equation I holds for the length L when the refractivity of the waveguide part is (n), the wavelength of a light source is lambda, and a small integer which is relatively prime to (m) or a real number close to it is (l).
JP12601980A 1980-09-12 1980-09-12 Optical mixing and branching circuit Pending JPS5752004A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12601980A JPS5752004A (en) 1980-09-12 1980-09-12 Optical mixing and branching circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12601980A JPS5752004A (en) 1980-09-12 1980-09-12 Optical mixing and branching circuit

Publications (1)

Publication Number Publication Date
JPS5752004A true JPS5752004A (en) 1982-03-27

Family

ID=14924697

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12601980A Pending JPS5752004A (en) 1980-09-12 1980-09-12 Optical mixing and branching circuit

Country Status (1)

Country Link
JP (1) JPS5752004A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6380207A (en) * 1986-09-24 1988-04-11 Nippon Telegr & Teleph Corp <Ntt> Optical star coupler
JPH01105904U (en) * 1987-12-29 1989-07-17
JPH03501065A (en) * 1987-11-20 1991-03-07 イギリス国 electro-optic waveguide device
JPH04131807A (en) * 1990-09-21 1992-05-06 Nec Corp Plane type optical branching/coupling device
US5570442A (en) * 1992-11-19 1996-10-29 Mitsubishi Gas Chemical Company, Inc. Design and manufacture of an optimized waveguide-type multiple branched star coupler

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
APPIIED PHYSICS LETTERS *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6380207A (en) * 1986-09-24 1988-04-11 Nippon Telegr & Teleph Corp <Ntt> Optical star coupler
JPH03501065A (en) * 1987-11-20 1991-03-07 イギリス国 electro-optic waveguide device
JPH01105904U (en) * 1987-12-29 1989-07-17
JPH04131807A (en) * 1990-09-21 1992-05-06 Nec Corp Plane type optical branching/coupling device
US5570442A (en) * 1992-11-19 1996-10-29 Mitsubishi Gas Chemical Company, Inc. Design and manufacture of an optimized waveguide-type multiple branched star coupler

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