ابوالفضل بزاز

Magnetic sensors operate according to change of a quantity under the influence of the magnetic field. One of the types of magnetic field sensors that has recently attracted the attention of many researchers is the fiber-optic sensors that are based on the Faraday effect. One of the hallmarks of these magneto-optical sensors compared to other magnetic sensors is the fast response time of these sensors. These sensors have a response of the order of GHz, while similar sensors on other methods have a speed in the range of kilo and MHz. This advantage makes the use of these sensors in special applications and requires fast response time. In this dissertation, the design and fabrication of a fiber optic sensor has been studied numerically and experimentally in order to measure high currents. The performance of this sensor has been eva‎luated for currents up to 190 amps, and the results related to the sensor's ability to measure the current are satisfactory. Magnetic field sensors based on polarimetry using optical fiber as magnetic material have been manufactured and studied. In this project, we used an optical fiber with a length of 10km and a semiconductor laser with a length of 1550 nm. By applying a current in the range of 66 amperes, the polarization of the light rotation to 51.61 And the test error is about 1.5 amps.

چرخش قطبش _ اثر فارادي _ حسگر ميدان مغناطيسي

polarization rotation-faraday effect-optical fiber sensor

abolfazl bazaz

dr. mohammad vahedi