JPS54139564A - Photo branching and coupling device - Google Patents

Photo branching and coupling device

Info

Publication number
JPS54139564A
JPS54139564A JP4737478A JP4737478A JPS54139564A JP S54139564 A JPS54139564 A JP S54139564A JP 4737478 A JP4737478 A JP 4737478A JP 4737478 A JP4737478 A JP 4737478A JP S54139564 A JPS54139564 A JP S54139564A
Authority
JP
Japan
Prior art keywords
branching
coupling device
photo
numerical aperture
optical fibers
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
JP4737478A
Other languages
Japanese (ja)
Other versions
JPH0215843B2 (en
Inventor
Tsutomu Tanaka
Akimoto Serizawa
Katsuji Hattori
Yoshinobu Tsujimoto
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP4737478A priority Critical patent/JPS54139564A/en
Publication of JPS54139564A publication Critical patent/JPS54139564A/en
Publication of JPH0215843B2 publication Critical patent/JPH0215843B2/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
    • G02B6/28—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
    • G02B6/2821—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 lateral coupling between contiguous fibres to split or combine optical signals

Abstract

PURPOSE:To enable even the light of higher order mode to be propagated without loss by making the numerical aperture of an optical fiber constituting the photo branching and coupling device larger than the numerical aperture of the optical fibers constituting the main transmission lines connected thereto. CONSTITUTION:This constitutes the photo branching and coupling device by securing two optical fibers formed with flat parts on the side faces by opposing said flat parts, whereby, e.g., the photo branching and coupling device 10 is so formed as to have a numerical aperture (NA) larger than NA of the optical fibers 9, 9' and a transmitting station X and recieving stations Y, Z are provided. In general, as the Na of the fiber increases, transmission band decreases but the transmission path length of the photo branching and coupling device 10 is short and therefore the transmission band of the entire part does not decrease. Hence, even when light enters the branching filter 10 or comes out from the branching filter 10, the light even of higher order mode may be propagated with less loss.
JP4737478A 1978-04-20 1978-04-20 Photo branching and coupling device Granted JPS54139564A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4737478A JPS54139564A (en) 1978-04-20 1978-04-20 Photo branching and coupling device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4737478A JPS54139564A (en) 1978-04-20 1978-04-20 Photo branching and coupling device

Publications (2)

Publication Number Publication Date
JPS54139564A true JPS54139564A (en) 1979-10-30
JPH0215843B2 JPH0215843B2 (en) 1990-04-13

Family

ID=12773316

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4737478A Granted JPS54139564A (en) 1978-04-20 1978-04-20 Photo branching and coupling device

Country Status (1)

Country Link
JP (1) JPS54139564A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56126724A (en) * 1980-03-10 1981-10-05 Matsushita Electric Ind Co Ltd Photoelectric transducer for illuminometer and manufacture thereof
FR2556847A1 (en) * 1983-12-16 1985-06-21 Socapex SEMI-PERMANENT CONNECTION DEVICE FOR OPTICAL FIBERS AND METHOD FOR ITS IMPLEMENTATION

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0435846U (en) * 1990-07-23 1992-03-25

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56126724A (en) * 1980-03-10 1981-10-05 Matsushita Electric Ind Co Ltd Photoelectric transducer for illuminometer and manufacture thereof
JPH0246887B2 (en) * 1980-03-10 1990-10-17 Matsushita Electric Ind Co Ltd
FR2556847A1 (en) * 1983-12-16 1985-06-21 Socapex SEMI-PERMANENT CONNECTION DEVICE FOR OPTICAL FIBERS AND METHOD FOR ITS IMPLEMENTATION

Also Published As

Publication number Publication date
JPH0215843B2 (en) 1990-04-13

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