HIGH SPATIAL-RESOLUTION DISTRIBUTED FIBER OPTIC TEMPERATURE SENSOR

1990-01-01
BOIARSKI, AA
MCGINNISS, VD
Sayan, Gönül
A distributed fiber optic temperature sensing system was developed which consisted of a high-resolution optical time domain reflectometer (OTOR) and a special optical fiber sensor. Several 1 kilometer lengths of prototype sensing fibers were formed by coating a modified, ultraviolet light curable polymer cladding material onto a core glass during fiber production. By monitoring changes in Rayleigh backscattered light from the fiber; local temperature changes were measured along the fiber length. A demonstration system was assembled with a 20 meter sensing fiber and extensive data were collected. These measurements indicated that hot spots as small as 10 cm could be detected over a temperature range of 0 to 150°C with a measurement accuracy of ±°C

Suggestions

Study of strain measurement by fiber optic sensors with a sensitive fiber loop ringdown spectrometer
Kaya, M.; Esentürk, Okan (Elsevier BV, 2020-01-01)
A sensitive fiber loop ringdown (FLRD) spectrometer without any additional optical component was utilized to obtain strain measurement on a single mode fiber optic sensor. The strain data were obtained by employing the theory of bending loss in single mode fibers. The best sensitivity of the sensors was obtained as 5.99 με with an 80.0 cm long sensor head when the sensor heads were stretched at the midpoint. The spectrometer system had a baseline-stability of 0.22%. Stretching the sensor head from off-midpo...
Low-cost bandpass filter for terahertz applications
Takan, Taylan; Keskin, Hakan; Altan, Hakan (2015-04-01)
Compared to the visible and infrared regions of the electromagnetic spectrum, development of optical components in the terahertz region has progressed slowly even though the feature size of structures makes many of them easily attainable by many conventional manufacturing techniques. Of these, the performance of components with machined metal surfaces, such as filters, typically has suffered from the errors and inconsistencies in the manufacturing which has led many to manufacture these using more expensive...
Low temperature excitation transfer in the FMO complex. Simulations.
Iseri, EI; Gulen, D (1998-08-22)
Electronic excited state (EES) models for the Fenna-Matthews-Olson (FMO) antenna complex of the green bacterium P. aestuarii have generally been based on obtaining an optimal match between the information contents of the optical steady-state spectra and the molecular organization [1-4]. Recent spectral and kinetic information gathered from probing the excited state processes through ultrafast measurements [5-7] have not yet been used effectively for further refinement of the EES and for quantification of th...
A numerical algorithm to determine straightness error, surface roughness, and waviness measured using a fiber optic interferometer
Yıldırım, Murat; Okutucu-Ozyurt, Tuba; Dursunkaya, Zafer (2016-11-01)
Fiber optic interferometry has been used to detect small displacements in diverse applications. Counting the number of fringes in fiber-optic interferometry is challenging due to the external effects induced in dynamic systems. In this paper, a novel interference fringe counting technique is developed to convert the intensity of interference data into displacements in the range of micrometers to millimeters while simultaneously resolving external dynamic effects. This technique consists of filtering the rou...
Highly sensitive fiber optic pressure sensors for wind turbine applications
KAYA, MALİK; Esentürk, Okan (The Scientific and Technological Research Council of Turkey, 2020-01-01)
Fiber optic pressure sensors utilizing ultra-high sensitive fiber loop ringdown (FLRD) spectroscopy were fabricated using a bare single mode fiber. The fiber optic pressure sensors were applied to monitor pressure change on a plastic pipe embedded into a sea sand filled container in laboratory conditions to simulate a tower. As the pressure applied to the sensor head was changed from 66.4 kPa to 331.6 kPa, changes in the ringdown time (RDT) were recorded. The lowest baseline stability of 0.20% was obtained ...
Citation Formats
A. BOIARSKI, V. MCGINNISS, and G. Sayan, “HIGH SPATIAL-RESOLUTION DISTRIBUTED FIBER OPTIC TEMPERATURE SENSOR,” 1990, vol. 1338, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35579.