temporal speckle patterns

10:55 May 27, 2019
This question was closed without grading. Reason: Answer found elsewhere

English to French translations [PRO]
Tech/Engineering - Physics
English term or phrase: temporal speckle patterns
The présent invention relates to methods and apparatus for detecting the location of disturbances in the environment of an optical fibre. In particular, the présent invention relates to a method and apparatus for detecting the direction of the disturbance relative to the optical fibre.

Disturbances are determined from changes in the temporal speckle pattern. The temporal speckle patterns are self-interference backscatter patterns which resuit in variations in intensity of the detected signal overtime.

The location information of the disturbance may be determined from a range dépendent timing of changes in the temporal speckle patterns. The changes in the temporal speckle patterns arise from changes in the refractive index of the fibre along its length caused by the disturbance. The disturbance may be, or may produce, a pressure wave such as an acoustic wave, or a température variation.
soumaya DH
Tunisia
Local time: 18:34


Summary of answers provided
5Corrélation temporelle des figures de speckle
GILOU
4motifs de tavelures (chatoiement) transitoires (temporaires)
FX Fraipont (X)
3 -1Les modèles de speckle temporel
El Mehdi Hakkou


  

Answers


2 hrs   confidence: Answerer confidence 3/5Answerer confidence 3/5 peer agreement (net): -1
Les modèles de speckle temporel


Explanation:
Voir cet article qui détaille les configurations, concepts et caractéristiques du spekle.

https://www-liphy.ujf-grenoble.fr/IMG/pdf/speckle2015_.pdf


    https://www.photoniques.com/articles/photon/pdf/2018/04/photon201892p29.pdf
    https://tel.archives-ouvertes.fr/tel-01478785/document
El Mehdi Hakkou
Morocco
Local time: 18:34
Native speaker of: Native in FrenchFrench

Peer comments on this answer (and responses from the answerer)
disagree  Tony M: But definitely the wrong meaning of 'pattern' here.
13 mins
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4 hrs   confidence: Answerer confidence 4/5Answerer confidence 4/5
motifs de tavelures (chatoiement) transitoires (temporaires)


Explanation:
https://patents.google.com/patent/EP1411652B1/fr
... la transmission en conséquence de différents motifs de tavelures qui résultent de diversités de .... 1977 Fibre-optic delay-line devices for RF signal processing."

https://fr.wikipedia.org/wiki/Tavelure_(optique)

FX Fraipont (X)
Belgium
Local time: 18:34
Native speaker of: Native in FrenchFrench
PRO pts in category: 36
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4 hrs   confidence: Answerer confidence 5/5
Corrélation temporelle des figures de speckle


Explanation:
http://www.granddictionnaire.com/ficheOqlf.aspx?Id_Fiche=184...

https://books.google.fr/books?id=GBCaauKNz5cC&pg=PR13&lpg=PR...

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Note added at 4 heures (2019-05-27 15:23:47 GMT)
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C'est ce que donne le GDT, et si vous cherchez figures de speckle sur Google, c'est évident

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Note added at 4 heures (2019-05-27 15:24:08 GMT)
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Temporal ne signifie pas temporary

GILOU
France
Local time: 18:34
Native speaker of: Native in FrenchFrench
PRO pts in category: 79
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