GB2268851B - Modulation depth control for FSK/IM optical transmitter - Google Patents

Modulation depth control for FSK/IM optical transmitter

Info

Publication number
GB2268851B
GB2268851B GB9215197A GB9215197A GB2268851B GB 2268851 B GB2268851 B GB 2268851B GB 9215197 A GB9215197 A GB 9215197A GB 9215197 A GB9215197 A GB 9215197A GB 2268851 B GB2268851 B GB 2268851B
Authority
GB
United Kingdom
Prior art keywords
fsk
optical transmitter
depth control
modulation depth
modulation
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
GB9215197A
Other versions
GB2268851A (en
GB9215197D0 (en
Inventor
Jonathan Paul King
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
Application filed by Northern Telecom Ltd filed Critical Northern Telecom Ltd
Priority to GB9215197A priority Critical patent/GB2268851B/en
Publication of GB9215197D0 publication Critical patent/GB9215197D0/en
Publication of GB2268851A publication Critical patent/GB2268851A/en
Application granted granted Critical
Publication of GB2268851B publication Critical patent/GB2268851B/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)
  • Semiconductor Lasers (AREA)
  • Optical Communication System (AREA)
GB9215197A 1992-07-17 1992-07-17 Modulation depth control for FSK/IM optical transmitter Expired - Fee Related GB2268851B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9215197A GB2268851B (en) 1992-07-17 1992-07-17 Modulation depth control for FSK/IM optical transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9215197A GB2268851B (en) 1992-07-17 1992-07-17 Modulation depth control for FSK/IM optical transmitter

Publications (3)

Publication Number Publication Date
GB9215197D0 GB9215197D0 (en) 1992-09-02
GB2268851A GB2268851A (en) 1994-01-19
GB2268851B true GB2268851B (en) 1995-10-25

Family

ID=10718854

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9215197A Expired - Fee Related GB2268851B (en) 1992-07-17 1992-07-17 Modulation depth control for FSK/IM optical transmitter

Country Status (1)

Country Link
GB (1) GB2268851B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2293684B (en) * 1994-09-27 1998-10-14 Northern Telecom Ltd An interfermetric multiplexer
DE602006010058D1 (en) * 2006-08-03 2009-12-10 Alcatel Lucent Control circuit for online OTDR measurement with integrated sine wave

Also Published As

Publication number Publication date
GB2268851A (en) 1994-01-19
GB9215197D0 (en) 1992-09-02

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Legal Events

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

Effective date: 20080717