Novel Optical Fibre Distributed Temperature Sensor based on the Landau-Placzek ratio

1997 ◽  
Author(s):  
Gareth P. Lees ◽  
Peter Wait ◽  
Trevor P. Newson
Keyword(s):  
Optical Fibre ◽  
Temperature Sensor ◽  
Distributed Temperature Sensor

scholarly journals Distributed temperature sensor using Nd3+ -doped optical fibre

1986 ◽  
Vol 22 (8) ◽  
pp. 418 ◽  
Author(s):  
M.C. Farries ◽  
M.E. Fermann ◽  
R.I. Laming ◽  
S.B. Poole ◽  
D.N. Payne ◽  
...  
Keyword(s):  
Optical Fibre ◽  
Temperature Sensor ◽  
Distributed Temperature Sensor

High-resolution optical-fibre distributed temperature sensor based on the frequency-derived technique

1996 ◽  
Vol 32 (24) ◽  
pp. 2263 ◽  
Author(s):  
F. Parvaneh ◽  
M. Farhadiroushan ◽  
V.A. Handerek ◽  
A.J. Rogers
Keyword(s):  
High Resolution ◽  
Optical Fibre ◽  
Temperature Sensor ◽  
Distributed Temperature Sensor

scholarly journals Carbon laminates with RE doped optical fibre sensors

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Piotr Miluski ◽  
Marcin Kochanowicz ◽  
Jacek Żmojda ◽  
AbíLio P. Silva ◽  
Paulo N. B. Reis ◽  
...  
Keyword(s):  
Optical Fibre ◽  
Health Monitoring ◽  
Temperature Sensor ◽  
Composite Laminates ◽  
Linear Response ◽  
Relative Sensitivity ◽  
Optical Fibre Sensor ◽  
Distributed Temperature Sensor ◽  
New Type ◽  
Fibre Sensor

Abstract A new type of luminescent optical fibre sensor for structural health monitoring of composite laminates (CFRP) is proposed. The Nd3+ doped multi-core doubleclad fibre incorporated in composite structure was used as a distributed temperature sensor. The change of luminescence intensity (Nd3+ ions) at the wavelength of 880 nm (4F3/2 → 4I9/2) and 1060 nm (4F3/2 → 4I11/2) was used for internal temperature monitoring. The special construction of optical fibre was used as it assures an efficient pumping mechanism and, at same time, it increases the measuring sensitivity. The linear response with relative sensitivity 0.015 K−1 was obtained for temperature range from 30 up to 75ºC. The manufacturing process of CFRP with embedded optical fibre sensor is also discussed.

Distributed temperature sensor based on Brillouin loss in an optical fibre for transient threshold monitoring

1996 ◽  
Vol 74 (1-2) ◽  
pp. 1-3 ◽  
Author(s):  
X. Bao ◽  
D. J. Webb ◽  
D. A. Jackson
Keyword(s):  
Response Time ◽  
Real Time ◽  
Optical Fibre ◽  
Temperature Sensor ◽  
Temperature Threshold ◽  
Real Time Monitoring ◽  
Distributed Temperature Sensor ◽  
Threshold Monitoring ◽  
Preset Temperature

A distributed temperature sensor for transient threshold monitoring with a 22 km sensing length, based on the Brillouin loss in standard communications fibre, is demonstrated. The system can be used for real-time monitoring of a preset temperature threshold. Good S/N ratios were achieved with only 8–16 sample averages giving a response time of 2 to 4 s with a temperature uncertainty of ±1 °C.

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