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JPS55105453A - Optical wavelength multiple repeating system - Google Patents

Optical wavelength multiple repeating system

Info

Publication number
JPS55105453A
JPS55105453A JP1297479A JP1297479A JPS55105453A JP S55105453 A JPS55105453 A JP S55105453A JP 1297479 A JP1297479 A JP 1297479A JP 1297479 A JP1297479 A JP 1297479A JP S55105453 A JPS55105453 A JP S55105453A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
optical
emitting
light
repeater
electric
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
JP1297479A
Inventor
Keijiro Nishimura
Original Assignee
Nec 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

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J14/00Optical multiplex systems
    • H04J14/02Wavelength-division multiplex systems

Abstract

PURPOSE:To realize an optical wavelength multiple repeating system in which the connection switch is carried out within the repeater, the lowering of the SN ratio is prevented for the specified channel, and the long-distance transmission is possible. CONSTITUTION:The electric signals sent from terminals 1-4 are converted into optical signals lambda1-lambdan featuring different wavelengths via light emitting element driving circuits 17-20 plus light emitting elements 25-28 and then transmitted to repeater 55 via a piece of fiber 53 after multiplication through optical compounding unit 33. The electric signals demodulated through optical branching unit 35 within repeater 35, light emitting elements 37-40 and demodulators 45-48 each are connected in switching to light emitting element driving circuits 21-24 so that the lowering of the SN ratio received at optical fibers 53 and 54 may be uniformed through all channels. Such electric signals are then transmitted again to fiber 54 via light emitting elements 29-32 plus optical compounding unit 34. Accordingly, the electric signal of one channel is transmitted i the form of the optical signal featuring the different wavelengths before and after repeater 55. As a result, the SN ratio can be made uniform over all channels.
JP1297479A 1979-02-07 1979-02-07 Optical wavelength multiple repeating system Pending JPS55105453A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1297479A JPS55105453A (en) 1979-02-07 1979-02-07 Optical wavelength multiple repeating system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1297479A JPS55105453A (en) 1979-02-07 1979-02-07 Optical wavelength multiple repeating system

Publications (1)

Publication Number Publication Date
JPS55105453A true true JPS55105453A (en) 1980-08-13

Family

ID=11820193

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1297479A Pending JPS55105453A (en) 1979-02-07 1979-02-07 Optical wavelength multiple repeating system

Country Status (1)

Country Link
JP (1) JPS55105453A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61173537A (en) * 1985-01-25 1986-08-05 Westinghouse Electric Corp Optical fiber circuit network
US4609442A (en) * 1985-06-24 1986-09-02 The Standard Oil Company Electrolysis of halide-containing solutions with amorphous metal alloys
US4696731A (en) * 1986-12-16 1987-09-29 The Standard Oil Company Amorphous metal-based composite oxygen anodes
US4702813A (en) * 1986-12-16 1987-10-27 The Standard Oil Company Multi-layered amorphous metal-based oxygen anodes
US4746584A (en) * 1985-06-24 1988-05-24 The Standard Oil Company Novel amorphous metal alloys as electrodes for hydrogen formation and oxidation
US4781803A (en) * 1985-02-26 1988-11-01 The Standard Oil Company Electrolytic processes employing platinum based amorphous metal alloy oxygen anodes
US5483372A (en) * 1994-11-29 1996-01-09 International Business Machines Corporation Single and multichannel transmission over long distances using repeated level-crossing remodulation
US7046930B2 (en) 2001-06-13 2006-05-16 Fujitsu Limited Optical communication system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61173537A (en) * 1985-01-25 1986-08-05 Westinghouse Electric Corp Optical fiber circuit network
US4781803A (en) * 1985-02-26 1988-11-01 The Standard Oil Company Electrolytic processes employing platinum based amorphous metal alloy oxygen anodes
US4609442A (en) * 1985-06-24 1986-09-02 The Standard Oil Company Electrolysis of halide-containing solutions with amorphous metal alloys
US4746584A (en) * 1985-06-24 1988-05-24 The Standard Oil Company Novel amorphous metal alloys as electrodes for hydrogen formation and oxidation
US4696731A (en) * 1986-12-16 1987-09-29 The Standard Oil Company Amorphous metal-based composite oxygen anodes
US4702813A (en) * 1986-12-16 1987-10-27 The Standard Oil Company Multi-layered amorphous metal-based oxygen anodes
US5483372A (en) * 1994-11-29 1996-01-09 International Business Machines Corporation Single and multichannel transmission over long distances using repeated level-crossing remodulation
US7046930B2 (en) 2001-06-13 2006-05-16 Fujitsu Limited Optical communication system

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