JPS5576307A - Distribution coupling type period branching filter - Google Patents

Distribution coupling type period branching filter

Info

Publication number
JPS5576307A
JPS5576307A JP14962578A JP14962578A JPS5576307A JP S5576307 A JPS5576307 A JP S5576307A JP 14962578 A JP14962578 A JP 14962578A JP 14962578 A JP14962578 A JP 14962578A JP S5576307 A JPS5576307 A JP S5576307A
Authority
JP
Japan
Prior art keywords
optical fibers
cores
fusion bonding
semicircular
nearly
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
JP14962578A
Other languages
Japanese (ja)
Other versions
JPS577409B2 (en
Inventor
Takao Itanami
Nobuo Nakajima
Tadashi Takano
Takaichi Watanabe
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 JP14962578A priority Critical patent/JPS5576307A/en
Publication of JPS5576307A publication Critical patent/JPS5576307A/en
Publication of JPS577409B2 publication Critical patent/JPS577409B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Mechanical Coupling Of Light Guides (AREA)

Abstract

PURPOSE:To provide the distribution coupling type period branching filter of low losses which do not produce any characteristic degradation owing to aging by so working two eccentric core optical fibers that when their worked faces are mated they assume a nearly circular section then fusion bonding the same. CONSTITUTION:The side faces of a large thickness of the clad parts 41, 42 of optical fibers in which the centers of cores 31, 32 deviate from the centers of the optical fibers are worked flat over the specified length, whereby their sectional shapes are made nearly semicircular. These are so formed that the sectional shape 4' obtained by mutually fusion bonding the flat parts of the semicircular optical fibers in which the sectional shapes of the two fibers are nearly semicircular is nearly circular in which the two cores 31', 32' are contained. Hence, the change in the sectional shape after the fusion bonding is less and the deformation of the cores is slight and therefore the losses are low and the characteristic change owing to aging does not occur.
JP14962578A 1978-12-05 1978-12-05 Distribution coupling type period branching filter Granted JPS5576307A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14962578A JPS5576307A (en) 1978-12-05 1978-12-05 Distribution coupling type period branching filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14962578A JPS5576307A (en) 1978-12-05 1978-12-05 Distribution coupling type period branching filter

Publications (2)

Publication Number Publication Date
JPS5576307A true JPS5576307A (en) 1980-06-09
JPS577409B2 JPS577409B2 (en) 1982-02-10

Family

ID=15479303

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14962578A Granted JPS5576307A (en) 1978-12-05 1978-12-05 Distribution coupling type period branching filter

Country Status (1)

Country Link
JP (1) JPS5576307A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62160406A (en) * 1986-01-07 1987-07-16 リツトン・システムズ・インコ−ポレ−テツド Optical fiber coupler and making thereof
US4786130A (en) * 1985-05-29 1988-11-22 The General Electric Company, P.L.C. Fibre optic coupler

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5391752A (en) * 1977-01-22 1978-08-11 Nippon Telegr & Teleph Corp <Ntt> Production of photo coupler

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5391752A (en) * 1977-01-22 1978-08-11 Nippon Telegr & Teleph Corp <Ntt> Production of photo coupler

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4786130A (en) * 1985-05-29 1988-11-22 The General Electric Company, P.L.C. Fibre optic coupler
JPS62160406A (en) * 1986-01-07 1987-07-16 リツトン・システムズ・インコ−ポレ−テツド Optical fiber coupler and making thereof

Also Published As

Publication number Publication date
JPS577409B2 (en) 1982-02-10

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