Raman-based distributed temperature sensor with simplex coding and link optimization

Raman-based distributed temperature sensor with simplex coding and link optimization

In this letter, a coded, Raman-based distributed temperature sensor system using 255-bit Simplex coded optical time domain reflectometry (OTDR) and optimized sensing link composed of cascaded fibers with different Raman coefficients, is proposed. This system is compared to a system with an uncoded O...

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Veröffentlicht in:IEEE photonics technology letters 2006-09, Vol.18 (17), p.1879-1881
Hauptverfasser: Jonghan Park, Bolognini, G., Duckey Lee, Pilhan Kim, Pilki Cho, Di Pasquale, F., Namkyoo Park
Format: Artikel
Sprache:eng
Schlagworte:
Coding
Detection
Distributed temperature sensor
Fiber nonlinear optics
Gain
Interrogation
Links
Optical fiber sensors
Optical fiber theory
Optical fibers
Optical scattering
Optical sensors
optical time domain reflectometry (OTDR)
Optimization
Pulse measurements
Raman scattering
spontaneous Raman scattering (SRS)
Temperature distribution
Temperature measurement
Temperature sensors
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Beschreibung
Zusammenfassung:In this letter, a coded, Raman-based distributed temperature sensor system using 255-bit Simplex coded optical time domain reflectometry (OTDR) and optimized sensing link composed of cascaded fibers with different Raman coefficients, is proposed. This system is compared to a system with an uncoded OTDR on standard single-mode fiber, demonstrating significant enhancement in the interrogation distance (19.5 km from coding gain, and 9.6 km from link optimization). Total sensing range of 37 km at 17-m/3-K spatial/temperature resolution were achieved, while employing conventional low power (80 mW) laser diodes
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2006.881239