CA1063675A - Method and apparatus for distortion reduction in optical communication systems - Google Patents

Method and apparatus for distortion reduction in optical communication systems

Info

Publication number
CA1063675A
CA1063675A CA276,274A CA276274A CA1063675A CA 1063675 A CA1063675 A CA 1063675A CA 276274 A CA276274 A CA 276274A CA 1063675 A CA1063675 A CA 1063675A
Authority
CA
Canada
Prior art keywords
optical
signal
electrical
transmitter according
converter
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.)
Expired
Application number
CA276,274A
Other languages
French (fr)
Inventor
Jozef Straus
Otto I. Szentesi
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom 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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Priority to CA276,274A priority Critical patent/CA1063675A/en
Priority to GB7509/78A priority patent/GB1566850A/en
Priority to DE19782814716 priority patent/DE2814716A1/en
Priority to JP53042710A priority patent/JPS6030458B2/en
Priority to FR7811128A priority patent/FR2387555A1/en
Application granted granted Critical
Publication of CA1063675A publication Critical patent/CA1063675A/en
Expired 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
    • H04B10/50—Transmitters
    • H04B10/501—Structural aspects
    • H04B10/502—LED 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
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
    • 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
    • H04B10/564—Power control
    • 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
    • H04B10/58—Compensation for non-linear transmitter output

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Nonlinear Science (AREA)
  • Optical Communication System (AREA)
  • Photo Coupler, Interrupter, Optical-To-Optical Conversion Devices (AREA)

Abstract

METHOD AND APPARATUS FOR DISTORTION
REDUCTION IN OPTICAL COMMUNICATION SYSTEMS
Abstract of the Disclosure An optical transmitter suitable for analog transmission in optic fiber communication systems utilizes two matched light emitting diodes to achieve distortion reduction.

- i -

Claims (6)

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An optical transmitter having two parallel signal paths and comprising:
signal dividing means For coupling a first component of an electrical input signal to a first of said signal paths, and a second component of said input signal to a second of said signal paths;
said first signal path including a first electrical-to-optical converter optically coupled to an optical-to-electrical converter, said second signal path providing a predetermined electrical delay;
means providing the instantaneous difference between signals at the ends of said first and second signal paths; and a second electrical-to-optical converter for converting said instantaneous difference into an optical output.
2. The optical transmitter according to claim 1, said first and second electrical-to-optical converters having similar electrical-to-optical transfer characteristics, and said delay provided by said second optical path being substantially equal to the total delay of said first signal path.
3. The optical transmitter according to claim 2, said first and second electrical-to-optical converter being semiconductor light emitting diodes, and said optical-to-electrical converter being a semiconductor photodiode.
4. The optical transmitter according to claim 3, said second signal path including means for adjusting the signal power therethrough.
5. The optical transmitter according to claims 1, 2 or 3, said first component of said input signal containing half the power contained in said second component.
6. The optical transmitter according to claim 1, 2 or 3, said signals at the ends of said first and second signal paths containing signal powers in the ratio of (K+1):G, G being the quotient of the power at the end of said first signal path by the power at its beginning, and K being a predetermined real number.
CA276,274A 1977-04-15 1977-04-15 Method and apparatus for distortion reduction in optical communication systems Expired CA1063675A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CA276,274A CA1063675A (en) 1977-04-15 1977-04-15 Method and apparatus for distortion reduction in optical communication systems
GB7509/78A GB1566850A (en) 1977-04-15 1978-02-24 Method and apparatus for distortion reduction in optical communication system
DE19782814716 DE2814716A1 (en) 1977-04-15 1978-04-05 OPTICAL TRANSMITTER FOR THE REDUCTION OF DISTORTION IN OPTICAL TRANSMISSION SYSTEMS
JP53042710A JPS6030458B2 (en) 1977-04-15 1978-04-13 optical transmitter
FR7811128A FR2387555A1 (en) 1977-04-15 1978-04-14 REDUCED DISTORTION OPTICAL TRANSMITTER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA276,274A CA1063675A (en) 1977-04-15 1977-04-15 Method and apparatus for distortion reduction in optical communication systems

Publications (1)

Publication Number Publication Date
CA1063675A true CA1063675A (en) 1979-10-02

Family

ID=4108399

Family Applications (1)

Application Number Title Priority Date Filing Date
CA276,274A Expired CA1063675A (en) 1977-04-15 1977-04-15 Method and apparatus for distortion reduction in optical communication systems

Country Status (5)

Country Link
JP (1) JPS6030458B2 (en)
CA (1) CA1063675A (en)
DE (1) DE2814716A1 (en)
FR (1) FR2387555A1 (en)
GB (1) GB1566850A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6246289Y2 (en) * 1981-05-11 1987-12-12
DE4029399A1 (en) * 1990-09-17 1992-03-19 Eickhoff Geb Opto-coupler for digital signal transmission - uses control stage for counter-phase control of parallel elements
DE19736380A1 (en) * 1997-08-21 1999-02-25 Alsthom Cge Alcatel Method and device for generating an optical output signal

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2218431C3 (en) * 1972-04-17 1986-10-23 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement to compensate for the non-linear relationship between applied voltage and light emission in luminescent diodes

Also Published As

Publication number Publication date
JPS6030458B2 (en) 1985-07-16
FR2387555A1 (en) 1978-11-10
JPS53129505A (en) 1978-11-11
DE2814716A1 (en) 1978-10-19
DE2814716C2 (en) 1989-08-10
GB1566850A (en) 1980-05-08
FR2387555B1 (en) 1984-10-26

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