JPS57115041A - Multiplex transmission system for light wavelength - Google Patents

Multiplex transmission system for light wavelength

Info

Publication number
JPS57115041A
JPS57115041A JP56000683A JP68381A JPS57115041A JP S57115041 A JPS57115041 A JP S57115041A JP 56000683 A JP56000683 A JP 56000683A JP 68381 A JP68381 A JP 68381A JP S57115041 A JPS57115041 A JP S57115041A
Authority
JP
Japan
Prior art keywords
wavelength
light emitting
emitting elements
multiplex transmission
light
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
JP56000683A
Other languages
Japanese (ja)
Inventor
Masataka Ito
Takeshi Koseki
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP56000683A priority Critical patent/JPS57115041A/en
Publication of JPS57115041A publication Critical patent/JPS57115041A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
    • H04B10/85—Protection from unauthorised access, e.g. eavesdrop protection

Abstract

PURPOSE:To reduce the crosstalk, by dividing semiconductor light emitting elements into two groups to make the timing of information transfer different in these groups in case of the multiplex transmission due to semiconductor light emitting elements different in wavelength of emitted light. CONSTITUTION:Four light emitting elements LE1-LE4 different in wavelength are divided into two groups, and the first group consists of the LE1 and the LE3, and the second group consists of the LE2 and the LE4. When light emitting elements LE1-LE4 are arranged according to wavelength, the light is not branched completely by a light branching filter to generate crosstalk components shown by oblique lines 12-15 from signals of adjacent wavelengths if respective wavelengths are close to one another. Lights of elements LE1 and LE3 of the first group are transmitted at timings a1-a3, and lights of elements LE2 and the LE4 of the second group are transmitted at timings b1-b3, and thus, the light wavelength multiplex transmission is possible without crosstalk components 12-15.
JP56000683A 1981-01-08 1981-01-08 Multiplex transmission system for light wavelength Pending JPS57115041A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56000683A JPS57115041A (en) 1981-01-08 1981-01-08 Multiplex transmission system for light wavelength

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56000683A JPS57115041A (en) 1981-01-08 1981-01-08 Multiplex transmission system for light wavelength

Publications (1)

Publication Number Publication Date
JPS57115041A true JPS57115041A (en) 1982-07-17

Family

ID=11480553

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56000683A Pending JPS57115041A (en) 1981-01-08 1981-01-08 Multiplex transmission system for light wavelength

Country Status (1)

Country Link
JP (1) JPS57115041A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5951633A (en) * 1982-09-17 1984-03-26 Fuji Electric Corp Res & Dev Ltd Optical multiplex circuit
US6483625B2 (en) 1999-07-01 2002-11-19 Fujitsu Limited WDM optical transmission apparatus
JP2013045374A (en) * 2011-08-25 2013-03-04 Yasutomo Higashi Communication medium and data communication system for prevention of data leakage

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5951633A (en) * 1982-09-17 1984-03-26 Fuji Electric Corp Res & Dev Ltd Optical multiplex circuit
JPH0119778B2 (en) * 1982-09-17 1989-04-13 Fuji Denki Sogo Kenkyusho Kk
US6483625B2 (en) 1999-07-01 2002-11-19 Fujitsu Limited WDM optical transmission apparatus
JP2013045374A (en) * 2011-08-25 2013-03-04 Yasutomo Higashi Communication medium and data communication system for prevention of data leakage

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