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GB2289978B - Optical waveguide amplifiers - Google Patents

Optical waveguide amplifiers

Info

Publication number
GB2289978B
GB2289978B GB9510649A GB9510649A GB2289978B GB 2289978 B GB2289978 B GB 2289978B GB 9510649 A GB9510649 A GB 9510649A GB 9510649 A GB9510649 A GB 9510649A GB 2289978 B GB2289978 B GB 2289978B
Authority
GB
United Kingdom
Prior art keywords
optical waveguide
waveguide amplifiers
amplifiers
optical
waveguide
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
GB9510649A
Other versions
GB2289978A (en
GB9510649D0 (en
Inventor
Maurice O'sullivan
Jonathan Paul King
Andrew Niall Robinson
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
Priority claimed from GB9411061A external-priority patent/GB9411061D0/en
Application filed by Northern Telecom Ltd filed Critical Northern Telecom Ltd
Priority to GB9510649A priority Critical patent/GB2289978B/en
Publication of GB9510649D0 publication Critical patent/GB9510649D0/en
Publication of GB2289978A publication Critical patent/GB2289978A/en
Application granted granted Critical
Publication of GB2289978B publication Critical patent/GB2289978B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0221—Power control, e.g. to keep the total optical power constant
    • H04J14/02216—Power control, e.g. to keep the total optical power constant by gain equalization
    • 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
    • H01S3/10023—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers by functional association of additional optical elements, e.g. filters, gratings, reflectors
    • 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
    • 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
    • H04B10/294—Signal power control in a multiwavelength system, e.g. gain equalisation
    • H04B10/2941—Signal power control in a multiwavelength system, e.g. gain equalisation using an equalising unit, e.g. a filter
    • 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
    • H01S2301/00—Functional characteristics
    • H01S2301/04—Gain spectral shaping, flattening
    • 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
    • H01S3/0675—Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] fibre lasers
    • 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
    • H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
    • H01S3/2308—Amplifier arrangements, e.g. MOPA
    • H01S3/2325—Multi-pass amplifiers, e.g. regenerative amplifiers
    • H01S3/2333—Double-pass amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Optical Communication System (AREA)
  • Lasers (AREA)
GB9510649A 1994-06-02 1995-05-25 Optical waveguide amplifiers Expired - Fee Related GB2289978B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9510649A GB2289978B (en) 1994-06-02 1995-05-25 Optical waveguide amplifiers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9411061A GB9411061D0 (en) 1994-06-02 1994-06-02 Optical waveguide amplifiers
GB9510649A GB2289978B (en) 1994-06-02 1995-05-25 Optical waveguide amplifiers

Publications (3)

Publication Number Publication Date
GB9510649D0 GB9510649D0 (en) 1995-07-19
GB2289978A GB2289978A (en) 1995-12-06
GB2289978B true GB2289978B (en) 1997-11-26

Family

ID=26304988

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9510649A Expired - Fee Related GB2289978B (en) 1994-06-02 1995-05-25 Optical waveguide amplifiers

Country Status (1)

Country Link
GB (1) GB2289978B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2725283B1 (en) * 1994-09-29 1996-11-22 Alcatel Nv REGULATED OPTICAL AMPLIFIER WITH OPTICAL CIRCULATOR
DE19547603A1 (en) * 1995-12-20 1997-06-26 Sel Alcatel Ag Optical amplifier device
AUPP218198A0 (en) * 1998-03-04 1998-03-26 University Of Sydney, The Ultra-broadband low-noise gain-flattened rare-earth-doped fibre amplifier
US6785472B1 (en) * 1999-06-15 2004-08-31 Lucent Technologies Inc. Broadband amplified WDM ring
GB2379327A (en) * 2001-08-30 2003-03-05 Marconi Caswell Ltd Amplifier

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2265059A (en) * 1992-03-04 1993-09-15 Northern Telecom Ltd Optical regenerators
GB2265751A (en) * 1992-03-23 1993-10-06 Univ Southampton Optical amplifier
US5283686A (en) * 1992-07-27 1994-02-01 General Instrument Corporation, Jerrold Communications Optical systems with grating reflector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2265059A (en) * 1992-03-04 1993-09-15 Northern Telecom Ltd Optical regenerators
GB2265751A (en) * 1992-03-23 1993-10-06 Univ Southampton Optical amplifier
US5283686A (en) * 1992-07-27 1994-02-01 General Instrument Corporation, Jerrold Communications Optical systems with grating reflector

Also Published As

Publication number Publication date
GB2289978A (en) 1995-12-06
GB9510649D0 (en) 1995-07-19

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Legal Events

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

Effective date: 20040525