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JPS55161201A - Light delay equalizer - Google Patents

Light delay equalizer

Info

Publication number
JPS55161201A
JPS55161201A JP6742279A JP6742279A JPS55161201A JP S55161201 A JPS55161201 A JP S55161201A JP 6742279 A JP6742279 A JP 6742279A JP 6742279 A JP6742279 A JP 6742279A JP S55161201 A JPS55161201 A JP S55161201A
Authority
JP
Japan
Prior art keywords
light
wavelength
grating
optical guide
lambda3
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
JP6742279A
Other languages
Japanese (ja)
Other versions
JPS6123522B2 (en
Inventor
Yoshihisa Yamamoto
Haruhiko Tsuchiya
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 JP6742279A priority Critical patent/JPS55161201A/en
Publication of JPS55161201A publication Critical patent/JPS55161201A/en
Publication of JPS6123522B2 publication Critical patent/JPS6123522B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Optical Integrated Circuits (AREA)

Abstract

PURPOSE:To eliminate the band limitation owing the wavelength dispersion of optical fibers by reverse-coupling the light from the incident side optical guide to the exit side optical guide by way of the grating of changing periods disposed between the 1st and the 2nd cores. CONSTITUTION:The optical guide of dielectric or semiconductor is formed by a clad region 1, core region 2 and clad region 3, and a clad region 3, core region 4 and clad region 5 form an optical guide in a similar manner. Here, if the light of different wavelengths, say, lambda1, lambda2, lambda3... enters the right side through the guides 1-2-3 from the left side of the figure, the light of the wavelength lambda1 is coupled to the guides 3-4-5 by the grating 6 and propagates to the left side but the light of the other wavelengths lambda2, lambda3... does not cause coupling and passes therethrough. In the grating 7, only the light of the wavelength lambda2 couples and in the grating 8, only the light of the wavelength lambda3 causes coupling. Thereafter, the light is coupled to the guides 3-4-5 at the points differing with every wavelength in the similar manner.
JP6742279A 1979-06-01 1979-06-01 Light delay equalizer Granted JPS55161201A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6742279A JPS55161201A (en) 1979-06-01 1979-06-01 Light delay equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6742279A JPS55161201A (en) 1979-06-01 1979-06-01 Light delay equalizer

Publications (2)

Publication Number Publication Date
JPS55161201A true JPS55161201A (en) 1980-12-15
JPS6123522B2 JPS6123522B2 (en) 1986-06-06

Family

ID=13344449

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6742279A Granted JPS55161201A (en) 1979-06-01 1979-06-01 Light delay equalizer

Country Status (1)

Country Link
JP (1) JPS55161201A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57211104A (en) * 1981-06-22 1982-12-24 Nippon Telegr & Teleph Corp <Ntt> Directional coupler type optical demultiplexer having periodic structure
JPS61231511A (en) * 1985-04-08 1986-10-15 Hitachi Ltd Optical multiplexer/demultiplexer
US4737007A (en) * 1986-02-24 1988-04-12 American Telephone And Telegraph Company, At&T Bell Laboratories Narrow-band wavelength selective optical coupler
JPH02239209A (en) * 1989-03-14 1990-09-21 Canon Inc Optical wavelength filter and photodetector
JPH0328804A (en) * 1989-01-13 1991-02-07 E I Du Pont De Nemours & Co Light waveguide device, element for manufacturing device and method for manufacturing device and element
WO1994006052A1 (en) * 1992-09-10 1994-03-17 Fujitsu Limited Optical circuit system and its constituents
US5570439A (en) * 1993-01-19 1996-10-29 Hitachi, Ltd. Optical waveguide device and optical transmission system
US6693736B1 (en) 1992-09-10 2004-02-17 Fujitsu Limited Optical circuit system and components of same
WO2009081905A1 (en) * 2007-12-21 2009-07-02 Fujikura Ltd. Optical waveguide type wavelength dispersion compensation device and method for manufacturing the device

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57211104A (en) * 1981-06-22 1982-12-24 Nippon Telegr & Teleph Corp <Ntt> Directional coupler type optical demultiplexer having periodic structure
JPS61231511A (en) * 1985-04-08 1986-10-15 Hitachi Ltd Optical multiplexer/demultiplexer
US4737007A (en) * 1986-02-24 1988-04-12 American Telephone And Telegraph Company, At&T Bell Laboratories Narrow-band wavelength selective optical coupler
JPH0328804A (en) * 1989-01-13 1991-02-07 E I Du Pont De Nemours & Co Light waveguide device, element for manufacturing device and method for manufacturing device and element
JPH02239209A (en) * 1989-03-14 1990-09-21 Canon Inc Optical wavelength filter and photodetector
WO1994006052A1 (en) * 1992-09-10 1994-03-17 Fujitsu Limited Optical circuit system and its constituents
US5757989A (en) * 1992-09-10 1998-05-26 Fujitsu Limited Optical circuit system capable of producing optical signal having a small fluctuation and components of same
US6215585B1 (en) 1992-09-10 2001-04-10 Fujitsu Limited Optical circuit system and components of same technical field
US6693736B1 (en) 1992-09-10 2004-02-17 Fujitsu Limited Optical circuit system and components of same
US5570439A (en) * 1993-01-19 1996-10-29 Hitachi, Ltd. Optical waveguide device and optical transmission system
WO2009081905A1 (en) * 2007-12-21 2009-07-02 Fujikura Ltd. Optical waveguide type wavelength dispersion compensation device and method for manufacturing the device
JP2009151247A (en) * 2007-12-21 2009-07-09 Fujikura Ltd Optical waveguide type wavelength dispersion compensation device and method of manufacturing the same

Also Published As

Publication number Publication date
JPS6123522B2 (en) 1986-06-06

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