The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A magnetic field sensor based on a novel phase-shifted fiber Bragg grating with magnetic fluid is proposed and experimentally demonstrated. It is fabricated by cleaving a uniform fiber Bragg grating at the center point, introducing a micrometre gap as a phase-shift and then filling the gap with magnetic fluid. External applied magnetic field changes refractive index of the magnetic fluid, leading...
We experimentally demonstrate a new method for modulating the light polarization state of the fiber. Both of the light polarization degree and polarization direction can be modulated. In the experiment, microfiber is immersed into the magnetic fluid (MF). When there is external magnetic field, magnetic nanoparticles of the MF generate magneto-optical dichroism and a non-circular symmetric distribution...
In this paper, combined with the high-sensitivity weak magnetic field measurement technique of atomic magnetometer structure and the high precision measurement advantage of optical fiber sensing technology, an all-fiber weak magnetic sensor (AFWMS) structure is proposed and studied deeply. The sensing principle of measuring the weak magnetic field by using the atomic magnetometer structure is analyzed...
A magnetic field sensor based on a novel phase-shifted fiber Bragg grating with magnetic fluid is proposed and experimentally demonstrated. It is fabricated by cleaving a uniform fiber Bragg grating at the center point, introducing a micrometre gap as a phase-shift and then filling the gap with magnetic fluid. External applied magnetic field changes refractive index of the magnetic fluid, leading...
A magnetic field sensor based on twisted single mode fiber and magnetic fluid (MF) is proposed and demonstrated. The sensor consists of two twisted points on a single mode fiber introduced by flame-heated and rotation treatment. Cladding modes are excited at the first twisted point and part of them are coupled back to the fiber core at the second twisted point, forming an inline Mach-Zehnder interferometer...
A magnetic field optical fiber sensor based on Sagnac interference is proposed by inserting a silica tube filled with magnetic fluid into the Sagnac loop. The birefringence of the sensor is present in the loop, and the transmission spectrum as a function of the magnetic field intensity has been theoretically analyzed and experimentally demonstrated. The results show that the spectral response is proportional...
A two-dimension magnetic flux density distribution of the ferromagnetic metal was simulated by using finite element analysis method. From the magnetic flux density distribution, the crack in ferromagnetic metal can be detected through the magnetic flux leakage. Experimental results showed that the magnetic flux density decreased gradually with the increasing of the width and depth of the crack under...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.