JPS55158744A - Light wavelength control system for optical multiplex communication system - Google Patents

Light wavelength control system for optical multiplex communication system

Info

Publication number
JPS55158744A
JPS55158744A JP6495579A JP6495579A JPS55158744A JP S55158744 A JPS55158744 A JP S55158744A JP 6495579 A JP6495579 A JP 6495579A JP 6495579 A JP6495579 A JP 6495579A JP S55158744 A JPS55158744 A JP S55158744A
Authority
JP
Japan
Prior art keywords
shift
wavelength
branching
optical
sent
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
JP6495579A
Other languages
Japanese (ja)
Inventor
Haruo Fujiwara
Mitsuhiro Motegi
Masashi Kiyota
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP6495579A priority Critical patent/JPS55158744A/en
Publication of JPS55158744A publication Critical patent/JPS55158744A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • 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
    • H04B10/50—Transmitters
    • H04B10/501—Structural aspects
    • H04B10/506—Multiwavelength transmitters
    • 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
    • H04B10/50—Transmitters
    • H04B10/572—Wavelength control

Abstract

PURPOSE:To give compensation to the shift of the wavelength by detecting the shift of the light emitting central wavelength at the reception side and then giving the control to the branching characteristics of the branching filter. CONSTITUTION:The signal to be transmitted is sent to the reception side via transmission line 12 consisting of the optical fiber cable and after electro-optic conversion 10 and optical compounding 11. At the reception side, part of the received optical signal is sent to light wavelength monitor device 14 to detect the shift of the light emitting central wavelength. And the shift detected is then sent to branching characteristic control unit 17. Thus the control is given to the branching characteristics of the optical branching filter in accordance with the changing amount of the shift mentioned above, ensuring the compensation for the shift of the wavelength. As a result, the transmission quality can be stabilized.
JP6495579A 1979-05-28 1979-05-28 Light wavelength control system for optical multiplex communication system Pending JPS55158744A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6495579A JPS55158744A (en) 1979-05-28 1979-05-28 Light wavelength control system for optical multiplex communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6495579A JPS55158744A (en) 1979-05-28 1979-05-28 Light wavelength control system for optical multiplex communication system

Publications (1)

Publication Number Publication Date
JPS55158744A true JPS55158744A (en) 1980-12-10

Family

ID=13272963

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6495579A Pending JPS55158744A (en) 1979-05-28 1979-05-28 Light wavelength control system for optical multiplex communication system

Country Status (1)

Country Link
JP (1) JPS55158744A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0197263A2 (en) * 1985-04-04 1986-10-15 International Business Machines Corporation Method and apparatus for deskewing WDM data transmitted through a dispersive medium
JPS6210935A (en) * 1985-07-08 1987-01-19 Matsushita Electric Ind Co Ltd Light attenuator provided with input output power indication
JPS63102490A (en) * 1986-10-17 1988-05-07 Tokyo Keiki Co Ltd Controller for electromagnetic fluid direction switching valve
JPH08321825A (en) * 1995-03-22 1996-12-03 Toshiba Corp Wavelength multiplex light transmission device and optical repeater

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0197263A2 (en) * 1985-04-04 1986-10-15 International Business Machines Corporation Method and apparatus for deskewing WDM data transmitted through a dispersive medium
JPS6210935A (en) * 1985-07-08 1987-01-19 Matsushita Electric Ind Co Ltd Light attenuator provided with input output power indication
JPS63102490A (en) * 1986-10-17 1988-05-07 Tokyo Keiki Co Ltd Controller for electromagnetic fluid direction switching valve
JPH08321825A (en) * 1995-03-22 1996-12-03 Toshiba Corp Wavelength multiplex light transmission device and optical repeater

Similar Documents

Publication Publication Date Title
CA2088459A1 (en) System for optically transmitting digital communications over an optical fiber with dispersion at the operating wavelength
JPS55158744A (en) Light wavelength control system for optical multiplex communication system
ES8204178A1 (en) Optical coupler for transmission and reception over optical fibre.
JPS55105453A (en) Optical wavelength multiple repeating system
JPS568103A (en) Photoswitch
JPS5539465A (en) Optical fiber communication system
JPS56169948A (en) Optical multiplex transmission system
JPS56103552A (en) Transmitting system of monitor signal
JPS5687948A (en) Optical communication system
JPS57154954A (en) Transmitting system of optical data
JPS5789703A (en) Equalization system for optical-fiber delay dispersion
JPS5710103A (en) Wavelength multiplex link coupler
JPS5767907A (en) Photoelectric conversion connector
JPS55115746A (en) Optical communication system
SE8306221L (en) DEVICE FOR MANUAL TESTING OF DRAWINGS OF AN OPTICAL SUBSCRIPTION CONNECTION LINE OF GLASS FIBER WITH DOUBLE DIRECTED DIVISION OF WAVE LENGTHS IN CHANNELS
JPS55140342A (en) Optical fiber digital transmission unit
JPS5687946A (en) Optical fiber communication equipment
JPS57127342A (en) Branchable multiplex loop transmitter
JPS56137135A (en) Optical fiber for optical sensor
JPS6465938A (en) Method for monitoring change of light loss in optical transmission line
JPS56111416A (en) Multipoint time-division measuring device
JPS57186856A (en) Single line bi-direction optical transmitting device
JPS5488709A (en) Light exchanging system
JPS5691542A (en) Data transmitter
JPS55145445A (en) Optical wavelength multiple transmitting system