NO20011481L - Optisk attenuator med doble styreslöyfer - Google Patents

Optisk attenuator med doble styreslöyfer

Info

Publication number
NO20011481L
NO20011481L NO20011481A NO20011481A NO20011481L NO 20011481 L NO20011481 L NO 20011481L NO 20011481 A NO20011481 A NO 20011481A NO 20011481 A NO20011481 A NO 20011481A NO 20011481 L NO20011481 L NO 20011481L
Authority
NO
Norway
Prior art keywords
radiation
optical attenuator
interruption
feedback loop
attenuator module
Prior art date
Application number
NO20011481A
Other languages
English (en)
Other versions
NO20011481D0 (no
Inventor
Roger Warwick Brown
Earl Anthony Dennis
Original Assignee
Marconi Comm 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 Marconi Comm Ltd filed Critical Marconi Comm Ltd
Publication of NO20011481D0 publication Critical patent/NO20011481D0/no
Publication of NO20011481L publication Critical patent/NO20011481L/no

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
    • H04B10/29—Repeaters
    • H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
    • H04B10/293—Signal power control
    • H04B10/2931—Signal power control using AGC

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
  • Lasers (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)

Abstract

Foreliggende oppfinnelse fremskaffer en optisk attenuator (200) som omfatter en optisk attenuatormodul (210), en optisk splitter (220), en detektor (240) og en styringsenhet. (250). Inngangsstråling (P) mottas av attenuatormodulen (210) som kan drives til å svekke inngangsstrålingen for å generere tilsvarende svekket stråling (P). Dektoren. (240) kan drives til å motta en del av den svekkede stråling (0,1 P0) og generere et tilsvarende elektrisk signal T,. Signalet Ttilføres styringsenheten (250) via en første tilbakekoblingssløyfe (262) for å regulere attenuatormodulen (210) slik at strålingseffekt-en i den svekkede stråling opprettholdes på et forutbestemt nivå. I en situasjon hvor det opptrer et avbrudd i inngangsstrålingen (P,) kan styringsenheten (250) drives til å overvåke temperaturen i attenuatormodulen (210) ved å utnytte en termistorføler (280) og regulere temperaturen i modulen (210) til en forutbestemt temperatur under avbruddet ved å utnytte en andre tilbakekoblingssløyfe (264). Når avbruddet slutter overføres styringen av attenuatormodulen (210) tilbake til den første tilbakekoblingssløyfe (262) for å opprettholde den svekkde stråling på det forutbestemte nivå.
NO20011481A 2000-03-23 2001-03-22 Optisk attenuator med doble styreslöyfer NO20011481L (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0006939A GB2360602B (en) 2000-03-23 2000-03-23 Optical attenuator including dual control loops
US09/815,382 US6606447B2 (en) 2000-03-23 2001-03-22 Optical attenuator including dual control loops

Publications (2)

Publication Number Publication Date
NO20011481D0 NO20011481D0 (no) 2001-03-22
NO20011481L true NO20011481L (no) 2001-09-24

Family

ID=26243936

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20011481A NO20011481L (no) 2000-03-23 2001-03-22 Optisk attenuator med doble styreslöyfer

Country Status (7)

Country Link
US (1) US6606447B2 (no)
EP (1) EP1137207B1 (no)
JP (1) JP2001311920A (no)
CN (1) CN1180283C (no)
AU (1) AU2985901A (no)
GB (1) GB2360602B (no)
NO (1) NO20011481L (no)

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Publication number Priority date Publication date Assignee Title
DE60135734D1 (de) * 2000-03-23 2008-10-23 Ericsson Ab Verfahren und vorrichtung zum erzeugen eines pulsbreitenmodulierten signals
JP2004055637A (ja) * 2002-07-17 2004-02-19 Fujitsu Ltd 光増幅器
US6895161B2 (en) * 2002-09-30 2005-05-17 Rosemount Inc. Variable optical attenuator
US7327911B2 (en) * 2004-10-19 2008-02-05 Sioptical, Inc. Optical detector configuration and utilization as feedback control in monolithic integrated optic and electronic arrangements
US7290395B2 (en) * 2005-10-06 2007-11-06 Gentcorp Ltd High power thermoelectric controller
US7862181B2 (en) * 2006-04-13 2011-01-04 Delta Electronics, Inc. Projection apparatus
US20070240429A1 (en) * 2006-04-13 2007-10-18 Delta Electronics, Inc. Temperature controlling system adapted for a projection apparatus
JP5224361B2 (ja) * 2008-11-12 2013-07-03 古河電気工業株式会社 光学モジュールとその制御方法
US8538229B1 (en) * 2009-03-13 2013-09-17 Alliance Fiber Optic Products, Inc. Pluggable variable optical attenuators and methods for making the same
TWI394969B (zh) * 2009-10-30 2013-05-01 Wistron Neweb Corp 測試系統
US20140158578A1 (en) 2012-12-06 2014-06-12 Jason Varan Folding apparatus for the containment and transport of bottles and method of use
US8691598B1 (en) 2012-12-06 2014-04-08 Ultratech, Inc. Dual-loop control for laser annealing of semiconductor wafers
CN103676708B (zh) * 2013-10-31 2017-07-28 江苏奥雷光电有限公司 一种可控光衰减器及其使用方法
CN106612513B (zh) * 2016-12-27 2023-11-17 京信网络***股份有限公司 自动衰减装置、基站信号切换测试设备及测试方法
CN109541752B (zh) * 2018-11-06 2020-06-16 重庆邮电大学 一种基于全光纤光控***的可调谐光衰减器

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07281219A (ja) * 1994-04-14 1995-10-27 Matsushita Electric Ind Co Ltd 光ファイバ増幅器
DE19547603A1 (de) * 1995-12-20 1997-06-26 Sel Alcatel Ag Optische Verstärkereinrichtung
US6025947A (en) * 1996-05-02 2000-02-15 Fujitsu Limited Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are varied
US5966493A (en) * 1998-02-20 1999-10-12 Molecular Optoelectronics Corporation Fiber optic attenuators and attenuation systems
US6208798B1 (en) * 2000-03-03 2001-03-27 E-Tek Dynamics Variable optical attenuator with thermo-optic control
US20020031324A1 (en) * 2000-09-12 2002-03-14 Cao Simon Xiaofan Variable optical attenuator using microelectro mechanical mirror
US6611649B2 (en) * 2001-03-19 2003-08-26 Molecular Optoelectronics Corporation Variable optical attenuator with polarization maintaining fiber

Also Published As

Publication number Publication date
GB2360602A8 (en) 2001-10-10
CN1319769A (zh) 2001-10-31
JP2001311920A (ja) 2001-11-09
US6606447B2 (en) 2003-08-12
GB0006939D0 (en) 2000-05-10
NO20011481D0 (no) 2001-03-22
GB2360602A (en) 2001-09-26
EP1137207A2 (en) 2001-09-26
GB2360602B (en) 2002-05-01
EP1137207A3 (en) 2003-12-17
EP1137207B1 (en) 2007-01-03
CN1180283C (zh) 2004-12-15
US20020136523A1 (en) 2002-09-26
AU2985901A (en) 2001-09-27

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