CA2024345A1 - Optical amplifier and optical communication system provided with the optical amplifier - Google Patents

Optical amplifier and optical communication system provided with the optical amplifier

Info

Publication number
CA2024345A1
CA2024345A1 CA2024345A CA2024345A CA2024345A1 CA 2024345 A1 CA2024345 A1 CA 2024345A1 CA 2024345 A CA2024345 A CA 2024345A CA 2024345 A CA2024345 A CA 2024345A CA 2024345 A1 CA2024345 A1 CA 2024345A1
Authority
CA
Canada
Prior art keywords
light beam
transmission
pumping light
information
optical
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
CA2024345A
Other languages
French (fr)
Other versions
CA2024345C (en
Inventor
Masuo Suyama
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=16793932&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2024345(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Publication of CA2024345A1 publication Critical patent/CA2024345A1/en
Application granted granted Critical
Publication of CA2024345C publication Critical patent/CA2024345C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04B10/29—Repeaters
    • H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
    • H01S3/1001—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers by controlling the optical pumping
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
    • H01S3/1301—Stabilisation of laser output parameters, e.g. frequency or amplitude in optical amplifiers
    • H01S3/13013—Stabilisation of laser output parameters, e.g. frequency or amplitude in optical amplifiers by controlling the optical pumping
    • 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
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
    • H04B10/0777—Monitoring line amplifier or line repeater equipment
    • 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
    • H04B10/2589—Bidirectional transmission
    • 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
    • H04B10/29—Repeaters
    • H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
    • H04B10/2912—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form characterised by the medium used for amplification or processing
    • 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
    • H04B10/29—Repeaters
    • H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
    • H04B10/293—Signal power control
    • H04B10/2931—Signal power control using AGC
    • 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
    • H04B10/29—Repeaters
    • H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
    • H04B10/298—Two-way repeaters, i.e. repeaters amplifying separate upward and downward lines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers
    • H01S3/06754—Fibre amplifiers
    • H01S3/06787—Bidirectional amplifier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2210/00—Indexing scheme relating to optical transmission systems
    • H04B2210/07—Monitoring an optical transmission system using a supervisory signal
    • H04B2210/074—Monitoring an optical transmission system using a supervisory signal using a superposed, over-modulated signal

Abstract

An optical communication system in which transmission of information with a pumping light beam acting as the carrier, in addition to transmission of information with a signal light beam, is made possible is disclosed. This optical communication system includes an optical fiber amplifier adapted to amplify a signal light beam by having the signal light beam and a pumping light beam propagated through its rare-earth-doped fiber doped with a rare earth element and a modulating circuit for modulating the pumping light beam with a high-frequency modulating signal having a period shorter than the life span of fluorescence resulting from an excited state. In the case where the signal light beam and the pumping light beam are propagated in the same direction through the rare-earth-doped fiber, the transmission of information with the pumping light beam acting as the carrier can constitute a transmission of supervisory signal for an optical repeater, and in the case where the signal light beam and the pumping light beam are propagated in the directions opposite to each other through the rare-earth-doped fiber, a two-way transmission can be achieved by the transmission of information with the signal light beam and the transmission of information with the pumping light beam.
CA002024345A 1989-08-31 1990-08-30 Optical amplifier and optical communication system provided with the optical amplifier Expired - Lifetime CA2024345C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP01-223172 1989-08-31
JP01223172A JP3137632B2 (en) 1989-08-31 1989-08-31 Optical communication system with optical fiber amplifier

Publications (2)

Publication Number Publication Date
CA2024345A1 true CA2024345A1 (en) 1991-03-01
CA2024345C CA2024345C (en) 1995-02-14

Family

ID=16793932

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002024345A Expired - Lifetime CA2024345C (en) 1989-08-31 1990-08-30 Optical amplifier and optical communication system provided with the optical amplifier

Country Status (5)

Country Link
US (6) US5299048A (en)
EP (6) EP0675610A1 (en)
JP (1) JP3137632B2 (en)
CA (1) CA2024345C (en)
DE (5) DE69033859T2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111373614A (en) * 2017-11-24 2020-07-03 司浦爱激光技术英国有限公司 Device for providing optical radiation

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US5526163A (en) 1996-06-11
EP0676871A1 (en) 1995-10-11
DE69033867T2 (en) 2002-06-27
US5299048A (en) 1994-03-29
DE69033858D1 (en) 2001-12-20
DE69033867D1 (en) 2002-01-03
DE69033859T2 (en) 2002-06-13
DE69033859D1 (en) 2001-12-20
EP1063795A3 (en) 2001-03-14
DE69033858T2 (en) 2002-06-13
US5510931A (en) 1996-04-23
US5535050A (en) 1996-07-09
EP0415438A3 (en) 1992-02-26
US5521737A (en) 1996-05-28
EP0415438B1 (en) 1996-11-06
JP3137632B2 (en) 2001-02-26
EP0669730B1 (en) 2001-11-21
DE69034006D1 (en) 2002-10-24
EP0415438A2 (en) 1991-03-06
EP1063795B1 (en) 2002-09-18
DE69034006T2 (en) 2003-06-05
EP0669730A3 (en) 1995-09-20
DE69029072T2 (en) 1997-04-03
EP0674403A1 (en) 1995-09-27
CA2024345C (en) 1995-02-14
EP0675610A1 (en) 1995-10-04
US5546213A (en) 1996-08-13
EP0669730A2 (en) 1995-08-30
EP1063795A2 (en) 2000-12-27
DE69029072D1 (en) 1996-12-12
JPH0387727A (en) 1991-04-12
EP0676871B1 (en) 2001-11-14
EP0674403B1 (en) 2001-11-14

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