A low-noise φ-OTDR sensor is developed by adding a 2-stage pre-amplification system mixing linear and nonlinear amplification in a 3x3 Michelson interferometric configuration. Its performance is evaluated by deploying it as a distributed acoustic sensing system in a survey well (sampling rate: 10 kHz), showing noise floor levels below 1 nε


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    Title :

    Nonlinear amplification in φ-OTDR for distributed acoustic sensing


    Contributors:

    Conference:

    European Workshop on Optical Fibre Sensors (EWOFS 2023) ; 2023 ; Mons, Belgium


    Published in:

    Proc. SPIE ; 12643


    Publication date :

    2023-05-23





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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