GB2505114A - Optical sensor - Google Patents

Optical sensor Download PDF

Info

Publication number
GB2505114A
GB2505114A GB1319933.6A GB201319933A GB2505114A GB 2505114 A GB2505114 A GB 2505114A GB 201319933 A GB201319933 A GB 201319933A GB 2505114 A GB2505114 A GB 2505114A
Authority
GB
United Kingdom
Prior art keywords
depletion
interferometer
optical sensor
modulator
arm
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Withdrawn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
GB1319933.6A
Other versions
GB201319933D0 (en
Inventor
Arnold Peter Roscoe Harpin
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.)
Oxsensis Ltd
Original Assignee
Oxsensis 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 Oxsensis Ltd filed Critical Oxsensis Ltd
Publication of GB201319933D0 publication Critical patent/GB201319933D0/en
Publication of GB2505114A publication Critical patent/GB2505114A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B9/00—Measuring instruments characterised by the use of optical techniques
    • G01B9/02—Interferometers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/266—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light by interferometric means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B9/00—Measuring instruments characterised by the use of optical techniques
    • G01B9/02—Interferometers
    • G01B9/02015—Interferometers characterised by the beam path configuration
    • G01B9/02023—Indirect probing of object, e.g. via influence on cavity or fibre
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B9/00—Measuring instruments characterised by the use of optical techniques
    • G01B9/02—Interferometers
    • G01B9/02055—Reduction or prevention of errors; Testing; Calibration
    • G01B9/02062—Active error reduction, i.e. varying with time
    • G01B9/02064—Active error reduction, i.e. varying with time by particular adjustment of coherence gate, i.e. adjusting position of zero path difference in low coherence interferometry
    • G01B9/02065—Active error reduction, i.e. varying with time by particular adjustment of coherence gate, i.e. adjusting position of zero path difference in low coherence interferometry using a second interferometer before or after measuring interferometer
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B9/00—Measuring instruments characterised by the use of optical techniques
    • G01B9/02—Interferometers
    • G01B9/0209—Low-coherence interferometers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/268—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light using optical fibres
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
    • H04L51/21—Monitoring or handling of messages
    • H04L51/212—Monitoring or handling of messages using filtering or selective blocking

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Integrated Circuits (AREA)
  • Instruments For Measurement Of Length By Optical Means (AREA)

Abstract

There is disclosed an optical sensor using a sensing interferometer, and a processing interferometer coupled to and matchable to the sensing interferometer. The processing interferometer is formed using waveguides integrated onto a substrate, and has first and second arms. A path length adjuster is formed using a first depletion modulator in one arm, and a second depletion modulator in the other arm, such that modulation of light is dominated by p-type carriers in the first depletion modulated by n-type carriers depletion in the second depletion modulator.
GB1319933.6A 2011-04-12 2012-04-04 Optical sensor Withdrawn GB2505114A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB1106204.9A GB201106204D0 (en) 2011-04-12 2011-04-12 Optical sensor
PCT/GB2012/050765 WO2012140411A1 (en) 2011-04-12 2012-04-04 Optical sensor

Publications (2)

Publication Number Publication Date
GB201319933D0 GB201319933D0 (en) 2013-12-25
GB2505114A true GB2505114A (en) 2014-02-19

Family

ID=44123003

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB1106204.9A Ceased GB201106204D0 (en) 2011-04-12 2011-04-12 Optical sensor
GB1319933.6A Withdrawn GB2505114A (en) 2011-04-12 2012-04-04 Optical sensor

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB1106204.9A Ceased GB201106204D0 (en) 2011-04-12 2011-04-12 Optical sensor

Country Status (2)

Country Link
GB (2) GB201106204D0 (en)
WO (1) WO2012140411A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103323058B (en) * 2013-07-12 2015-10-28 华南师范大学 A kind of optical fibre refractivity and temperature sensor and measuring method thereof
CN112229549B (en) * 2020-09-03 2021-12-28 山东科技大学 Intelligent optical fiber touch sounding system and method
GB2615737A (en) 2021-12-23 2023-08-23 Oxsensis Ltd Optical sensor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998022775A1 (en) * 1996-11-15 1998-05-28 Bookham Technology Limited Integrated interferometer
WO2002101379A2 (en) * 2001-06-08 2002-12-19 The Regents Of The University Of California Chemical micro-sensor
WO2004088394A2 (en) * 2003-03-25 2004-10-14 Sioptical, Inc. High-speed silicon-based electro-optic modulator
EP1473587A1 (en) * 2003-04-10 2004-11-03 Northrop Grumman Corporation Single-electrode push-pull configuration for semiconductor PIN modulators
WO2006058423A1 (en) * 2004-11-30 2006-06-08 Opsens Inc. Birefringent optical temperature sensor and method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995008787A1 (en) 1993-09-21 1995-03-30 Bookham Technology Limited An electro-optic device
GB2338059B (en) 1998-05-20 2000-03-08 Bookham Technology Ltd An optically addressed sensing system
GB0724411D0 (en) 2007-12-14 2008-01-30 Stfc Science & Technology Optical sensor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998022775A1 (en) * 1996-11-15 1998-05-28 Bookham Technology Limited Integrated interferometer
WO2002101379A2 (en) * 2001-06-08 2002-12-19 The Regents Of The University Of California Chemical micro-sensor
WO2004088394A2 (en) * 2003-03-25 2004-10-14 Sioptical, Inc. High-speed silicon-based electro-optic modulator
EP1473587A1 (en) * 2003-04-10 2004-11-03 Northrop Grumman Corporation Single-electrode push-pull configuration for semiconductor PIN modulators
WO2006058423A1 (en) * 2004-11-30 2006-06-08 Opsens Inc. Birefringent optical temperature sensor and method

Also Published As

Publication number Publication date
WO2012140411A1 (en) 2012-10-18
GB201319933D0 (en) 2013-12-25
GB201106204D0 (en) 2011-05-25

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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)