JPS5471653A - Waveguide type optical branching filter - Google Patents

Waveguide type optical branching filter

Info

Publication number
JPS5471653A
JPS5471653A JP13784277A JP13784277A JPS5471653A JP S5471653 A JPS5471653 A JP S5471653A JP 13784277 A JP13784277 A JP 13784277A JP 13784277 A JP13784277 A JP 13784277A JP S5471653 A JPS5471653 A JP S5471653A
Authority
JP
Japan
Prior art keywords
waveguide
propagation
refractive index
wavelength
type optical
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
JP13784277A
Other languages
Japanese (ja)
Other versions
JPS5722363B2 (en
Inventor
Morio Kobayashi
Hiroshi Terui
Kazumichi Egashira
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 JP13784277A priority Critical patent/JPS5471653A/en
Publication of JPS5471653A publication Critical patent/JPS5471653A/en
Publication of JPS5722363B2 publication Critical patent/JPS5722363B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE:To eliminate instability of optical system derived from vibrations, by selecting the refractive index so that the wavelength dependency of propagation constant of first wave guide differs from that of second waveguide. CONSTITUTION:Propagation lights of wavelength lambda0 and lambda1 are inputted from the left side end 15 of waveguide, and the propagation light of wavelength lambda0 only is bonded. The propagation light of wavelength lambda0 is also bonded in the part Z = 0 - e of wavegide II, and this propagation light reciprocates between the two waveguides. The waveguide layer 10 in waveguide II is tapered in the y-direction, and the equivalent refraction of waveguide II increases as the film thickness Wd of the waveguide layer 10 grows thicker. When the equivalent refractive index of the waveguide II changes, propagation constant beta2 also changes, but by changing the equivalent refractive index slightly, mismatching DELTAbeta of the propagation constant may be kept almost at zero.
JP13784277A 1977-11-18 1977-11-18 Waveguide type optical branching filter Granted JPS5471653A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13784277A JPS5471653A (en) 1977-11-18 1977-11-18 Waveguide type optical branching filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13784277A JPS5471653A (en) 1977-11-18 1977-11-18 Waveguide type optical branching filter

Publications (2)

Publication Number Publication Date
JPS5471653A true JPS5471653A (en) 1979-06-08
JPS5722363B2 JPS5722363B2 (en) 1982-05-12

Family

ID=15208083

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13784277A Granted JPS5471653A (en) 1977-11-18 1977-11-18 Waveguide type optical branching filter

Country Status (1)

Country Link
JP (1) JPS5471653A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4637684A (en) * 1981-07-31 1987-01-20 Canon Kabushiki Kaisha Method of making an optical coupler device utilizing volatile liquid to achieve optical contact
JPS62121408A (en) * 1985-11-22 1987-06-02 Hitachi Ltd Module for optical wavelength multiplex transmission

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3957341A (en) * 1974-09-03 1976-05-18 The United States Of America As Represented By The Secretary Of The Navy Passive frequency-selective optical coupler

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3957341A (en) * 1974-09-03 1976-05-18 The United States Of America As Represented By The Secretary Of The Navy Passive frequency-selective optical coupler

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4637684A (en) * 1981-07-31 1987-01-20 Canon Kabushiki Kaisha Method of making an optical coupler device utilizing volatile liquid to achieve optical contact
JPS62121408A (en) * 1985-11-22 1987-06-02 Hitachi Ltd Module for optical wavelength multiplex transmission

Also Published As

Publication number Publication date
JPS5722363B2 (en) 1982-05-12

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