Nail Ferhat Öztürk

Design of a Fiber Bragg Grating based temperature sensor

In this study, a Fiber Bragg Grating (FBG) based temperature sensor is designed. Simulation is conducted to observe FBGs response to the temperature change. The temperature incident on the FBG is gradually changed from 0°C to 60°C in 10°C steps and the frequency shifts in both RF and optical spectrum are observed.

The fiber optical sensing based on Brillouin scattering

Fiber optic sensor technology based on Brillouin scattering is rapidly spreading due to quantities is great precision measured such as temperature, strain and vibration in the long haul distributed sensing. In this study Brillouin scattering has been analyzed in the single mode fiber. An experimental setup has been done using OptiSystem 12.0, and Brillouin scattering monitored graphically in the 50 km optical fiber cable.

Using single-mode fiber as temperature sensor

Fiber optic cables are widely used in sensor applications of temperature, strain and pressure. The long sensing range, minimal power consumption and other advantages of classic fiber cables make these sensor systems very appealing. In this paper, the application of single mode fiber as temperature sensor and its effect are studied.

Design of a Fiber Bragg Grating multiple temperature sensor

In this study, a Fiber Bragg Grating (FBG) based multiple temperature sensor array is designed using a conventional laser source that has 6 nm bandwidth in lowest signal level. This design is simulated in OptSim optical software. The simulation is conducted to observe 5 FBGs response to the temperature change individually. The temperature incident on the FBGs are gradually changed from 0 °C to 60 °C in 10 °C steps and the frequency shift is observed with RF spectrum analyzer and optical shift is observed with optical spectrum analyzer. As a result, 10 pm/°C wavelength shift observed in simulation.

The analyzes of the Brillouin scattering for the different fiber types

In this study, Brillouin scattering is experimentally analyzed in the single mode fiber and dispersion shifted fiber optic cable. For this reason, wavelength of the 1550 nm laser is varied between 1526 nm and 1570 nm, and Brillouin shift is measured for both fiber types. Consequently, Brillouin scattering is higher in the single mode fiber.

Brillouin scattering based fiber optic strain sensor

In this study, stress-induced Brillouin scattering was experimentally analyzed by the weight applied to a specific point of the classical single mode fiber cable. A Brillouin optical time domain analysis (BOTDA) test system was developed for frequency shifts according to different weights applied. For different weights, the frequency values of the scattered light are obtained from the specific point of the fiber cable.