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GB2244595B - Fibre amplifier with automatic gain control - Google Patents

Fibre amplifier with automatic gain control

Info

Publication number
GB2244595B
GB2244595B GB9108174A GB9108174A GB2244595B GB 2244595 B GB2244595 B GB 2244595B GB 9108174 A GB9108174 A GB 9108174A GB 9108174 A GB9108174 A GB 9108174A GB 2244595 B GB2244595 B GB 2244595B
Authority
GB
United Kingdom
Prior art keywords
gain control
automatic gain
fibre amplifier
fibre
amplifier
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 - Fee Related
Application number
GB9108174A
Other versions
GB9108174D0 (en
GB2244595A (en
Inventor
Christopher John Rowe
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.)
British Telecommunications PLC
Original Assignee
British Telecommunications PLC
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 British Telecommunications PLC filed Critical British Telecommunications PLC
Publication of GB9108174D0 publication Critical patent/GB9108174D0/en
Publication of GB2244595A publication Critical patent/GB2244595A/en
Application granted granted Critical
Publication of GB2244595B publication Critical patent/GB2244595B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4287—Optical modules with tapping or launching means through the surface of the waveguide
    • G02B6/4289—Optical modules with tapping or launching means through the surface of the waveguide by inducing bending, microbending or macrobending, to the light guide
    • 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
    • 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
    • H01S3/1305—Feedback control systems
    • 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
    • H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Lasers (AREA)
GB9108174A 1990-04-18 1991-04-17 Fibre amplifier with automatic gain control Expired - Fee Related GB2244595B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB909008735A GB9008735D0 (en) 1990-04-18 1990-04-18 Fibre amplifier with automatic gain control

Publications (3)

Publication Number Publication Date
GB9108174D0 GB9108174D0 (en) 1991-06-05
GB2244595A GB2244595A (en) 1991-12-04
GB2244595B true GB2244595B (en) 1994-04-13

Family

ID=10674626

Family Applications (2)

Application Number Title Priority Date Filing Date
GB909008735A Pending GB9008735D0 (en) 1990-04-18 1990-04-18 Fibre amplifier with automatic gain control
GB9108174A Expired - Fee Related GB2244595B (en) 1990-04-18 1991-04-17 Fibre amplifier with automatic gain control

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB909008735A Pending GB9008735D0 (en) 1990-04-18 1990-04-18 Fibre amplifier with automatic gain control

Country Status (1)

Country Link
GB (2) GB9008735D0 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2648643B2 (en) * 1991-06-03 1997-09-03 日本電信電話株式会社 Optical amplifier
GB2262836A (en) * 1991-12-24 1993-06-30 Northern Telecom Ltd Optical pre-amplifier/receiver arrangement.
DE4214766A1 (en) * 1992-05-04 1993-11-11 Sel Alcatel Ag Fiber optic amplifier with non-reactive pump laser
US5223705A (en) * 1992-08-12 1993-06-29 At&T Bell Laboratories Measurement of an optical amplifier parameter with polarization
DE4315846A1 (en) * 1993-03-30 1994-10-06 Sel Alcatel Ag Fiber optic amplifier
JP2778438B2 (en) * 1993-12-27 1998-07-23 日本電気株式会社 Optical amplifier, optical amplifier design method, and optical repeater transmission system
JPH07240551A (en) * 1994-03-02 1995-09-12 Fujitsu Ltd Surge light generation prevention method in optical amplification transmission equipment
JPH08248455A (en) * 1995-03-09 1996-09-27 Fujitsu Ltd WDM optical amplifier
JP3739471B2 (en) * 1996-03-01 2006-01-25 富士通株式会社 Variable optical attenuator
US6369938B1 (en) 1996-05-28 2002-04-09 Fujitsu Limited Multi-wavelength light amplifier
FR2755771B1 (en) * 1996-11-13 1998-12-04 France Telecom FLUORESCENT ION DOPED OPTICAL WAVEGUIDE AMPLIFIER WITH TRANSVERSE FLUORESCENCE CONTROLLED GAIN
JP3860278B2 (en) * 1997-03-13 2006-12-20 富士通株式会社 Remote pumping wavelength division multiplexing optical transmission system
US6441955B1 (en) 1998-02-27 2002-08-27 Fujitsu Limited Light wavelength-multiplexing systems
US6496300B2 (en) 1998-02-27 2002-12-17 Fujitsu Limited Optical amplifier
US6603596B2 (en) 1998-03-19 2003-08-05 Fujitsu Limited Gain and signal level adjustments of cascaded optical amplifiers

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4165496A (en) * 1977-12-16 1979-08-21 Bell Telephone Laboratories, Incorporated Optical fiber light tap
GB2168838A (en) * 1984-03-30 1986-06-25 Boh Optical Ab Frequency and output regulation in laser diodes
EP0211537A1 (en) * 1985-07-15 1987-02-25 RAYCHEM CORPORATION (a Delaware corporation) Apparatus for coupling light between an optical fiber and a light element
GB2179468A (en) * 1985-08-20 1987-03-04 Pirelli General Plc Optical coupler for an optical fibre

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4165496A (en) * 1977-12-16 1979-08-21 Bell Telephone Laboratories, Incorporated Optical fiber light tap
GB2168838A (en) * 1984-03-30 1986-06-25 Boh Optical Ab Frequency and output regulation in laser diodes
EP0211537A1 (en) * 1985-07-15 1987-02-25 RAYCHEM CORPORATION (a Delaware corporation) Apparatus for coupling light between an optical fiber and a light element
GB2179468A (en) * 1985-08-20 1987-03-04 Pirelli General Plc Optical coupler for an optical fibre

Also Published As

Publication number Publication date
GB9008735D0 (en) 1990-06-13
GB9108174D0 (en) 1991-06-05
GB2244595A (en) 1991-12-04

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19950417