GB0114379D0 - Multichannel wavelength monitoring apparatus - Google Patents

Multichannel wavelength monitoring apparatus

Info

Publication number
GB0114379D0
GB0114379D0 GBGB0114379.1A GB0114379A GB0114379D0 GB 0114379 D0 GB0114379 D0 GB 0114379D0 GB 0114379 A GB0114379 A GB 0114379A GB 0114379 D0 GB0114379 D0 GB 0114379D0
Authority
GB
United Kingdom
Prior art keywords
optical
demultiplexer
multichannel
signals
array
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.)
Withdrawn
Application number
GBGB0114379.1A
Other versions
GB2376531A (en
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.)
Lumentum Technology UK Ltd
Original Assignee
Bookham Technology PLC
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 Bookham Technology PLC filed Critical Bookham Technology PLC
Priority to GB0114379A priority Critical patent/GB2376531A/en
Publication of GB0114379D0 publication Critical patent/GB0114379D0/en
Priority to PCT/GB2002/002583 priority patent/WO2002101964A1/en
Publication of GB2376531A publication Critical patent/GB2376531A/en
Withdrawn legal-status Critical Current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
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
    • H04B10/0773—Network aspects, e.g. central monitoring of transmission parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0298—Wavelength-division multiplex systems with sub-carrier multiplexing [SCM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2210/00—Indexing scheme relating to optical transmission systems
    • H04B2210/07—Monitoring an optical transmission system using a supervisory signal
    • H04B2210/075—Monitoring an optical transmission system using a supervisory signal using a pilot tone

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Optical Communication System (AREA)

Abstract

Multichannel wavelength monitoring apparatus 31 comprises inputs 33 for receiving multichannel optical signals, means 34 to apply identifying signals f<SB>1</SB> to f<SB>4</SB> to the multichannel optical signals, a demultiplexer 32 and a photodetector array 36 for detecting the output of the demultiplexer 32. A digital signal processor 35 may determine, on the basis of the identifying signals detected by the array 36, the components of the multichannel signals. The means 34 for applying identifying signals may be a variable optical attenuator, and the demultiplexer may be an optical channel modulator or array waveguide. The photodetector array may consist of photodiodes. In another embodiment, an input signal may be passed through a splitter into two optically conducting branches. Each branch may be selectively attenuated, the demultiplexer acting on the signal from the first branch when the second is attenuated and vice vera (see figure 1). The apparatus is used to determine parameters of each channel of the optical input, such as wavelength, relative power or amplitude, or optical signal-to-noise ratio.
GB0114379A 2001-06-13 2001-06-13 Multichannel wavelength monitoring apparatus Withdrawn GB2376531A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB0114379A GB2376531A (en) 2001-06-13 2001-06-13 Multichannel wavelength monitoring apparatus
PCT/GB2002/002583 WO2002101964A1 (en) 2001-06-13 2002-05-31 Multichannel wavelength monitoring apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0114379A GB2376531A (en) 2001-06-13 2001-06-13 Multichannel wavelength monitoring apparatus

Publications (2)

Publication Number Publication Date
GB0114379D0 true GB0114379D0 (en) 2001-08-08
GB2376531A GB2376531A (en) 2002-12-18

Family

ID=9916482

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0114379A Withdrawn GB2376531A (en) 2001-06-13 2001-06-13 Multichannel wavelength monitoring apparatus

Country Status (2)

Country Link
GB (1) GB2376531A (en)
WO (1) WO2002101964A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2387649A (en) * 2002-04-18 2003-10-22 Alcatel Optronics Uk Ltd A tuneable optical receiver
CN101729185B (en) * 2008-10-21 2013-06-05 华为技术有限公司 Marking or detecting method of optical signals, device and marking and detecting system
DE102017210375A1 (en) * 2017-06-21 2018-12-27 Sicoya Gmbh Optoelectronic component with optical attenuator
CN111385052B (en) 2018-12-29 2021-10-01 华为技术有限公司 Optical switching device, system and power calculation method

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2280560B (en) * 1993-07-31 1997-09-03 Northern Telecom Ltd Communications system
CA2155693C (en) * 1994-08-25 1999-12-14 Daniel A. Fishman Performance monitoring and fault location in optical transmission systems
JP3299101B2 (en) * 1995-12-15 2002-07-08 日本電気株式会社 WDM optical communication equipment
EP1104601A1 (en) * 1998-04-23 2001-06-06 Tellabs Operations, Inc. Methods and apparatus for selective attenuation in an optical communication using electrochromic material
US6055078A (en) * 1998-05-01 2000-04-25 University Of Maryland Baltimore County Real time wavelength monitoring circuit
KR100322125B1 (en) * 1999-01-14 2002-02-04 윤종용 AWG module and method for monitoring optical signal using AWG module
SE514069C2 (en) * 1999-04-30 2000-12-18 Ericsson Telefon Ab L M Optical wavelength selective filter and method for selectively filtering at least one wavelength from a group of wavelengths

Also Published As

Publication number Publication date
WO2002101964A1 (en) 2002-12-19
GB2376531A (en) 2002-12-18

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)