DE69414750D1 - Photodetektor und Verfahren zum Empfangen optischer Signale unbekannter Polarisation - Google Patents

Photodetektor und Verfahren zum Empfangen optischer Signale unbekannter Polarisation

Info

Publication number
DE69414750D1
DE69414750D1 DE69414750T DE69414750T DE69414750D1 DE 69414750 D1 DE69414750 D1 DE 69414750D1 DE 69414750 T DE69414750 T DE 69414750T DE 69414750 T DE69414750 T DE 69414750T DE 69414750 D1 DE69414750 D1 DE 69414750D1
Authority
DE
Germany
Prior art keywords
photodetector
optical signals
receiving optical
unknown polarization
polarization
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
DE69414750T
Other languages
English (en)
Other versions
DE69414750T2 (de
Inventor
Akbar Arab-Sadeghabadi
Bieren Karlheinz Von
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.)
Northrop Grumman Guidance and Electronics Co Inc
Original Assignee
Litton Systems Inc
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 Litton Systems Inc filed Critical Litton Systems Inc
Application granted granted Critical
Publication of DE69414750D1 publication Critical patent/DE69414750D1/de
Publication of DE69414750T2 publication Critical patent/DE69414750T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
    • G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Instruments For Measurement Of Length By Optical Means (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Optical Integrated Circuits (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Optical Couplings Of Light Guides (AREA)
DE69414750T 1993-04-27 1994-04-05 Photodetektor und Verfahren zum Empfangen optischer Signale unbekannter Polarisation Expired - Fee Related DE69414750T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/053,002 US5448058A (en) 1993-04-27 1993-04-27 Optical signal detection apparatus and method for preventing polarization signal fading in optical fiber interferometric sensor systems

Publications (2)

Publication Number Publication Date
DE69414750D1 true DE69414750D1 (de) 1999-01-07
DE69414750T2 DE69414750T2 (de) 1999-05-12

Family

ID=21981293

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69414750T Expired - Fee Related DE69414750T2 (de) 1993-04-27 1994-04-05 Photodetektor und Verfahren zum Empfangen optischer Signale unbekannter Polarisation

Country Status (5)

Country Link
US (1) US5448058A (de)
EP (1) EP0622619B1 (de)
JP (1) JP2654637B2 (de)
CA (1) CA2121880C (de)
DE (1) DE69414750T2 (de)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5852507A (en) 1995-12-11 1998-12-22 Hall; David B. High efficiency polarization diversity receiver system
EP1091222A3 (de) * 1996-07-08 2001-05-02 Corning Incorporated Methode zu Herstellung eines Mach-Zehnder Interferometers mit zusammengesetzten Fasern
US5949740A (en) 1997-06-06 1999-09-07 Litton Systems, Inc. Unbalanced fiber optic Michelson interferometer as an optical pick-off
US5959294A (en) * 1998-02-10 1999-09-28 Litton Systems, Inc. Method and apparatus for interrogation of fiber optic interferometric sensors in multi-channel applications
US6134281A (en) * 1998-02-10 2000-10-17 Litton Systems, Inc. Method and apparatus for calibration of a signal processing system utilizing digital down converters
US6496685B2 (en) * 1998-06-15 2002-12-17 Qualcomm, Incorporated Portable phone with imbedded battery
WO2000037925A1 (en) * 1998-12-18 2000-06-29 Future Fibre Technologies Pty Ltd Apparatus and method for monitoring a structure using a counter-propagating signal method for locating events
JP3696070B2 (ja) 2000-09-18 2005-09-14 三洋電機株式会社 弾性接点を備える機器
US7245418B2 (en) * 2005-03-18 2007-07-17 Northrop Grumman Corporation Electro-optic switching apparatus not requiring DC bias
US7035499B1 (en) 2005-03-18 2006-04-25 Northrop Grumman Corporation ON/OFF optical switching using combined acousto-optic and electro-optic switches
US7812960B2 (en) 2007-10-16 2010-10-12 Judd Gardner Optical ultrasound device
US20090100814A1 (en) * 2007-10-22 2009-04-23 Philip Egging Non-Powered Roller for Assisting Crop Pick-Up With a Baler
KR101800038B1 (ko) * 2009-12-04 2017-11-21 가부시키가이샤 한도오따이 에네루기 켄큐쇼 표시 장치
CN101852645B (zh) * 2010-06-25 2012-05-09 北京奥普科达科技有限公司 一种精确定位型光纤分布式振动传感器
CN106124029B (zh) * 2016-06-17 2020-12-29 中国人民解放军国防科学技术大学 基于微纳光纤全光相位调制器的光纤水听器系统
CN110095177B (zh) * 2019-04-24 2021-08-03 上海传输线研究所（中国电子科技集团公司第二十三研究所） 一种光纤光栅水听器相位解调偏振衰落抑制的系统和方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3604811A (en) * 1969-07-30 1971-09-14 Teeg Research Inc Shaft position encoders
US4516855A (en) * 1981-04-03 1985-05-14 International Business Machines Corporation Method and apparatus for determining the polarization state of a light wave field
US4653915A (en) * 1985-04-12 1987-03-31 The United States Of America As Represented By The Secretary Of The Navy Method for reduction of polarization fading in interferometers
SE463337B (sv) * 1989-03-08 1990-11-05 Stefan Karlsson Saett att detektera yttre paaverkan paa en optisk kabel

Also Published As

Publication number Publication date
CA2121880C (en) 1998-06-16
JP2654637B2 (ja) 1997-09-17
DE69414750T2 (de) 1999-05-12
EP0622619B1 (de) 1998-11-25
EP0622619A3 (de) 1995-05-31
EP0622619A2 (de) 1994-11-02
US5448058A (en) 1995-09-05
JPH0719949A (ja) 1995-01-20
CA2121880A1 (en) 1994-10-28

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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