GB2257319B - Direct demodulation of optical binary fsk signals - Google Patents

Direct demodulation of optical binary fsk signals

Info

Publication number
GB2257319B
GB2257319B GB9113938A GB9113938A GB2257319B GB 2257319 B GB2257319 B GB 2257319B GB 9113938 A GB9113938 A GB 9113938A GB 9113938 A GB9113938 A GB 9113938A GB 2257319 B GB2257319 B GB 2257319B
Authority
GB
United Kingdom
Prior art keywords
fsk signals
binary fsk
optical binary
direct demodulation
demodulation
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
GB9113938A
Other versions
GB2257319A (en
GB9113938D0 (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 GB9113938A priority Critical patent/GB2257319B/en
Publication of GB9113938D0 publication Critical patent/GB9113938D0/en
Publication of GB2257319A publication Critical patent/GB2257319A/en
Application granted granted Critical
Publication of GB2257319B publication Critical patent/GB2257319B/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
    • H04B10/60—Receivers
    • H04B10/66—Non-coherent receivers, e.g. using direct detection
    • H04B10/69—Electrical arrangements in the receiver
    • 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
    • H04B10/60—Receivers
    • H04B10/66—Non-coherent receivers, e.g. using direct detection
    • H04B10/67—Optical arrangements in the receiver
    • H04B10/676—Optical arrangements in the receiver for all-optical demodulation of the input optical signal
    • H04B10/677—Optical arrangements in the receiver for all-optical demodulation of the input optical signal for differentially modulated signal, e.g. DPSK signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H04L27/14—Demodulator circuits; Receiver circuits
    • H04L27/156—Demodulator circuits; Receiver circuits with demodulation using temporal properties of the received signal, e.g. detecting pulse width
    • H04L27/1563—Demodulator circuits; Receiver circuits with demodulation using temporal properties of the received signal, e.g. detecting pulse width using transition or level detection
GB9113938A 1991-06-27 1991-06-27 Direct demodulation of optical binary fsk signals Expired - Fee Related GB2257319B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9113938A GB2257319B (en) 1991-06-27 1991-06-27 Direct demodulation of optical binary fsk signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9113938A GB2257319B (en) 1991-06-27 1991-06-27 Direct demodulation of optical binary fsk signals

Publications (3)

Publication Number Publication Date
GB9113938D0 GB9113938D0 (en) 1991-08-14
GB2257319A GB2257319A (en) 1993-01-06
GB2257319B true GB2257319B (en) 1995-01-18

Family

ID=10697461

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9113938A Expired - Fee Related GB2257319B (en) 1991-06-27 1991-06-27 Direct demodulation of optical binary fsk signals

Country Status (1)

Country Link
GB (1) GB2257319B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2320635A (en) * 1996-12-19 1998-06-24 Northern Telecom Ltd Optical timing detection using an interferometer
GB9813412D0 (en) 1998-06-23 1998-08-19 Cambrian Systems Corp Optical FSK modulation and demodulation based on the thermal chirp for optical path overhead transfer using asymmetrical mach-zehnder interferometer
US6201632B1 (en) * 1999-05-28 2001-03-13 Trw Inc. Feed forward optical frequency/phase demodulator
US7949261B2 (en) 2006-04-26 2011-05-24 Mintera Corporation Partial DPSK (PDPSK) transmission systems
DE602006016814D1 (en) * 2006-10-13 2010-10-21 Alcatel Lucent Method and apparatus for improving the spectral efficiency of a DPSK modulation format
US8208816B2 (en) 2007-04-20 2012-06-26 Finisar Corporation Method and apparatus for dispersion mitigation in optical links
US9325425B2 (en) 2008-02-24 2016-04-26 Finisar Corporation Method and apparatus for demodulating and regenerating phase modulated optical signals
US8320777B2 (en) 2008-05-08 2012-11-27 Finisar Corporation Temperature controlled interferometer for phase demodulation

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2198904A (en) * 1986-10-23 1988-06-22 Plessey Co Plc Optical fsk demodulator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2198904A (en) * 1986-10-23 1988-06-22 Plessey Co Plc Optical fsk demodulator

Also Published As

Publication number Publication date
GB2257319A (en) 1993-01-06
GB9113938D0 (en) 1991-08-14

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Legal Events

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

Effective date: 19950627