DE3484728D1 - Optische empfaenger. - Google Patents

Optische empfaenger.

Info

Publication number
DE3484728D1
DE3484728D1 DE8484306209T DE3484728T DE3484728D1 DE 3484728 D1 DE3484728 D1 DE 3484728D1 DE 8484306209 T DE8484306209 T DE 8484306209T DE 3484728 T DE3484728 T DE 3484728T DE 3484728 D1 DE3484728 D1 DE 3484728D1
Authority
DE
Germany
Prior art keywords
optical receivers
receivers
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
DE8484306209T
Other languages
English (en)
Inventor
William James Stewart
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.)
Plessey Telecommunications Ltd
Original Assignee
Plessey Telecommunications 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 GB838325552A external-priority patent/GB8325552D0/en
Priority claimed from GB838331299A external-priority patent/GB8331299D0/en
Application filed by Plessey Telecommunications Ltd filed Critical Plessey Telecommunications Ltd
Application granted granted Critical
Publication of DE3484728D1 publication Critical patent/DE3484728D1/de
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
    • 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
    • H04B10/61—Coherent receivers
    • H04B10/63—Homodyne, i.e. coherent receivers where the local oscillator is locked in frequency and phase to the carrier signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/223—Demodulation in the optical domain

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optical Communication System (AREA)
DE8484306209T 1983-09-23 1984-09-10 Optische empfaenger. Expired - Fee Related DE3484728D1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB838325552A GB8325552D0 (en) 1983-09-23 1983-09-23 Optical detection systems
GB838331299A GB8331299D0 (en) 1983-11-23 1983-11-23 Optical receivers

Publications (1)

Publication Number Publication Date
DE3484728D1 true DE3484728D1 (de) 1991-07-25

Family

ID=26286870

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8484306209T Expired - Fee Related DE3484728D1 (de) 1983-09-23 1984-09-10 Optische empfaenger.

Country Status (3)

Country Link
US (1) US4648134A (de)
EP (1) EP0139461B1 (de)
DE (1) DE3484728D1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4783852A (en) * 1985-09-18 1988-11-08 Siemens Aktiengesellschaft Method and apparatus for acquiring information using a relative phase deviation of the optical signal of a local oscillator of a homodyne receiver
US4824201A (en) * 1987-07-13 1989-04-25 Bell Communications Research, Inc. Simultaneous transmission of LED and laser signals over single mode fiber
JPH01123538A (ja) * 1987-11-07 1989-05-16 Nec Corp 光平衡伝送回路
US6486958B1 (en) * 2001-04-24 2002-11-26 Agilent Technologies, Inc. Method and system for optical spectrum analysis with matched filter detection
US6900942B2 (en) * 2002-08-20 2005-05-31 Veridian Systems Wide field-of-view (FOV) coherent beam combiner/detector

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3320013A (en) * 1963-06-03 1967-05-16 Rca Corp Selectively controllable light guide apparatus
US3353896A (en) * 1963-06-12 1967-11-21 Rca Corp Light frequency shifter

Also Published As

Publication number Publication date
EP0139461A3 (en) 1988-05-04
US4648134A (en) 1987-03-03
EP0139461A2 (de) 1985-05-02
EP0139461B1 (de) 1991-06-19

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee