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JPS6424207A - Production of waveguide type directional coupler - Google Patents

Production of waveguide type directional coupler

Info

Publication number
JPS6424207A
JPS6424207A JP18012087A JP18012087A JPS6424207A JP S6424207 A JPS6424207 A JP S6424207A JP 18012087 A JP18012087 A JP 18012087A JP 18012087 A JP18012087 A JP 18012087A JP S6424207 A JPS6424207 A JP S6424207A
Authority
JP
Japan
Prior art keywords
clads
cores
laser light
coupling
tapered parts
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
JP18012087A
Other languages
Japanese (ja)
Inventor
Yoshinobu Mihashi
Satoshi Ishihara
Hiroyoshi Yajima
Naoto Uetsuka
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.)
Hitachi Cable Ltd
National Institute of Advanced Industrial Science and Technology AIST
Original Assignee
Agency of Industrial Science and Technology
Hitachi Cable 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 Agency of Industrial Science and Technology, Hitachi Cable Ltd filed Critical Agency of Industrial Science and Technology
Priority to JP18012087A priority Critical patent/JPS6424207A/en
Publication of JPS6424207A publication Critical patent/JPS6424207A/en
Pending legal-status Critical Current

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  • Optical Integrated Circuits (AREA)

Abstract

PURPOSE:To obtain a desired branching ratio by projecting a CO2 laser on the clads positioned between the cores of tapered parts and removing part thereof in such a manner that the branching ratio of a coupler attains a prescribed value. CONSTITUTION:After the laser light emitted form a CO2 laser device 8 is curved downward by a mirror 9, the laser light is condensed by a lens 10 and is projected on the clads 5 positioned between the cores 3 and 4 of the tapered parts 7. Since the CO2 laser light has large absorption in SiO2 glass, the laser light irradiated part of the clads 5 consisting of the SiO2 glass are instantaneously evaporated and removed. The coupling from the cores 3 to the cores 4 is mainly executed in a coupling part 6 at this time, but part of the coupling takes place in the tapered parts 7 as well and, therefore, the coupling constant is changed by partly removing the clads 5 between the cores of the tapered parts. The branching ratio (PC:PT) of the coupler is thus adjusted by changing the amt. of the clads 5 to be removed.
JP18012087A 1987-07-21 1987-07-21 Production of waveguide type directional coupler Pending JPS6424207A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18012087A JPS6424207A (en) 1987-07-21 1987-07-21 Production of waveguide type directional coupler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18012087A JPS6424207A (en) 1987-07-21 1987-07-21 Production of waveguide type directional coupler

Publications (1)

Publication Number Publication Date
JPS6424207A true JPS6424207A (en) 1989-01-26

Family

ID=16077768

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18012087A Pending JPS6424207A (en) 1987-07-21 1987-07-21 Production of waveguide type directional coupler

Country Status (1)

Country Link
JP (1) JPS6424207A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0903596A3 (en) * 1997-09-17 1999-06-02 Lucent Technologies Inc. Method of forming integrated optical circuit planar waveguide turning mirrors

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5627105A (en) * 1979-08-14 1981-03-16 Nippon Telegr & Teleph Corp <Ntt> Phase matching and coupling length adjusting hethod
JPS56125710A (en) * 1980-03-08 1981-10-02 Nippon Telegr & Teleph Corp <Ntt> Manufacture for optical waveguide path
JPS6183506A (en) * 1984-09-29 1986-04-28 Fujikura Ltd Production of optical circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5627105A (en) * 1979-08-14 1981-03-16 Nippon Telegr & Teleph Corp <Ntt> Phase matching and coupling length adjusting hethod
JPS56125710A (en) * 1980-03-08 1981-10-02 Nippon Telegr & Teleph Corp <Ntt> Manufacture for optical waveguide path
JPS6183506A (en) * 1984-09-29 1986-04-28 Fujikura Ltd Production of optical circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0903596A3 (en) * 1997-09-17 1999-06-02 Lucent Technologies Inc. Method of forming integrated optical circuit planar waveguide turning mirrors

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