GB9008735D0 - Fibre amplifier with automatic gain control - Google Patents

Fibre amplifier with automatic gain control

Info

Publication number
GB9008735D0
GB9008735D0 GB909008735A GB9008735A GB9008735D0 GB 9008735 D0 GB9008735 D0 GB 9008735D0 GB 909008735 A GB909008735 A GB 909008735A GB 9008735 A GB9008735 A GB 9008735A GB 9008735 D0 GB9008735 D0 GB 9008735D0
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.)
Pending
Application number
GB909008735A
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
Priority to GB909008735A priority Critical patent/GB9008735D0/en
Publication of GB9008735D0 publication Critical patent/GB9008735D0/en
Priority to GB9108174A priority patent/GB2244595B/en
Pending 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)
GB909008735A 1990-04-18 1990-04-18 Fibre amplifier with automatic gain control Pending GB9008735D0 (en)

Priority Applications (2)

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

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 (1)

Publication Number Publication Date
GB9008735D0 true GB9008735D0 (en) 1990-06-13

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 After (1)

Application Number Title Priority Date Filing Date
GB9108174A Expired - Fee Related GB2244595B (en) 1990-04-18 1991-04-17 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 Prevention system of surge light generation in optical amplification and transmission apparatus
JPH08248455A (en) * 1995-03-09 1996-09-27 Fujitsu Ltd Optical amplifier for wavelength multiplexing
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
US6496300B2 (en) 1998-02-27 2002-12-17 Fujitsu Limited Optical amplifier
US6441955B1 (en) 1998-02-27 2002-08-27 Fujitsu Limited Light wavelength-multiplexing systems
US6603596B2 (en) 1998-03-19 2003-08-05 Fujitsu Limited Gain and signal level adjustments of cascaded optical amplifiers

Family Cites Families (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
SE8401773L (en) * 1984-03-30 1985-10-01 Boh Optical Ab FREQUENCY AND POWER CONTROL OF 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
GB2244595A (en) 1991-12-04
GB2244595B (en) 1994-04-13
GB9108174D0 (en) 1991-06-05

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