A phase sensitive optical time domain reflectometry sensing scheme employing a two-stage nonlinear optical preamplification system is proposed to reduce the blind spot effect in Rayleigh scattering by improving the optical power distribution and to enhance the resolution at locations of low-backscatter intensity measurements, providing a higher signal-to-noise ratio for distributed acoustic measurements; the developed system has been tested in-laboratory and on in-field monitoring of a survey well in Cottessen, The Netherlands. The characterization shows strain noise levels below 1 nε for a 10 kHz sampling rate.
Low-noise ϕ-OTDR employing nonlinear optical preamplification for distributed acoustic sensing
Rossi L.;Bolognini G.
2023
Abstract
A phase sensitive optical time domain reflectometry sensing scheme employing a two-stage nonlinear optical preamplification system is proposed to reduce the blind spot effect in Rayleigh scattering by improving the optical power distribution and to enhance the resolution at locations of low-backscatter intensity measurements, providing a higher signal-to-noise ratio for distributed acoustic measurements; the developed system has been tested in-laboratory and on in-field monitoring of a survey well in Cottessen, The Netherlands. The characterization shows strain noise levels below 1 nε for a 10 kHz sampling rate.| File | Dimensione | Formato | |
|---|---|---|---|
|
Applied Optics DAS 2023.pdf
non disponibili
Descrizione: Articolo pubblicato
Tipologia:
Versione Editoriale (PDF)
Licenza:
NON PUBBLICO - Accesso privato/ristretto
Dimensione
8.38 MB
Formato
Adobe PDF
|
8.38 MB | Adobe PDF | Visualizza/Apri Richiedi una copia |
|
AAM final Applied Optics statement.pdf
accesso aperto
Descrizione: postscript
Tipologia:
Documento in Post-print
Licenza:
Altro tipo di licenza
Dimensione
1.39 MB
Formato
Adobe PDF
|
1.39 MB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
