GB2254746B - Optical transmitter - Google Patents

Optical transmitter

Info

Publication number
GB2254746B
GB2254746B GB9107809A GB9107809A GB2254746B GB 2254746 B GB2254746 B GB 2254746B GB 9107809 A GB9107809 A GB 9107809A GB 9107809 A GB9107809 A GB 9107809A GB 2254746 B GB2254746 B GB 2254746B
Authority
GB
United Kingdom
Prior art keywords
optical transmitter
transmitter
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.)
Expired - Fee Related
Application number
GB9107809A
Other versions
GB9107809D0 (en
GB2254746A (en
Inventor
Timothy Andrew Large
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
Alcatel Submarine Networks UK Ltd
Nortel Networks Optical Components Ltd
Original Assignee
Northern Telecom Ltd
Northern Telecom Europe Ltd
STC Submarine Systems Ltd
STC 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, Northern Telecom Europe Ltd, STC Submarine Systems Ltd, STC Ltd filed Critical Northern Telecom Ltd
Priority to GB9107809A priority Critical patent/GB2254746B/en
Publication of GB9107809D0 publication Critical patent/GB9107809D0/en
Publication of GB2254746A publication Critical patent/GB2254746A/en
Application granted granted Critical
Publication of GB2254746B publication Critical patent/GB2254746B/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
    • H04B10/50—Transmitters
    • H04B10/516—Details of coding or modulation
    • H04B10/54—Intensity modulation
    • H04B10/541—Digital intensity or amplitude modulation
    • 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
    • H04B10/503—Laser transmitters
    • H04B10/504—Laser transmitters using direct modulation
    • 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
    • H04B10/516—Details of coding or modulation
    • H04B10/548—Phase or frequency modulation
    • H04B10/556—Digital modulation, e.g. differential phase shift keying [DPSK] or frequency shift keying [FSK]
    • H04B10/5563—Digital frequency modulation

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Optical Communication System (AREA)
GB9107809A 1991-04-12 1991-04-12 Optical transmitter Expired - Fee Related GB2254746B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9107809A GB2254746B (en) 1991-04-12 1991-04-12 Optical transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9107809A GB2254746B (en) 1991-04-12 1991-04-12 Optical transmitter

Publications (3)

Publication Number Publication Date
GB9107809D0 GB9107809D0 (en) 1991-05-29
GB2254746A GB2254746A (en) 1992-10-14
GB2254746B true GB2254746B (en) 1995-03-29

Family

ID=10693159

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9107809A Expired - Fee Related GB2254746B (en) 1991-04-12 1991-04-12 Optical transmitter

Country Status (1)

Country Link
GB (1) GB2254746B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3378969B2 (en) * 1994-02-10 2003-02-17 エヌイーシートーキン株式会社 Receiving system
GB2293684B (en) * 1994-09-27 1998-10-14 Northern Telecom Ltd An interfermetric multiplexer
DE19625817A1 (en) * 1996-06-28 1998-01-02 Sel Alcatel Ag Optical transmitter for a hybrid fiber-radio system
DE19640725A1 (en) * 1996-10-02 1998-04-09 Reinhold Prof Dr Ing Noe Network analyzer
GB2320635A (en) 1996-12-19 1998-06-24 Northern Telecom Ltd Optical timing detection using an interferometer
US6101011A (en) * 1997-05-29 2000-08-08 Ciena Corporation Modulation format adjusting optical transponders
CA2393172C (en) * 2002-07-12 2008-11-04 Itf Technologies Optiques Inc.- Itf Optical Technologies Inc. All-fiber linear design depolarizer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2237469A (en) * 1989-10-24 1991-05-01 Stc Plc Optical transmission process and system
GB2237468A (en) * 1989-10-24 1991-05-01 Stc Plc Optical transmission process and system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2237469A (en) * 1989-10-24 1991-05-01 Stc Plc Optical transmission process and system
GB2237468A (en) * 1989-10-24 1991-05-01 Stc Plc Optical transmission process and system

Also Published As

Publication number Publication date
GB9107809D0 (en) 1991-05-29
GB2254746A (en) 1992-10-14

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20020412