Violakis Georgios, Korakas Nikolaos, Pissadakis Stavros
Opt Lett. 2018 Jan 1;43(1):142-145. doi: 10.1364/OL.43.000142.
A ferrofluid immersed, D-shape optical fiber exhibits differential loss up to 12 dB with respect to an azimuthally rotating magnetic field placed around its longitudinal axis, manifested in its measured transmission power. Investigating the magneto induced refractive index and loss changes by using ferrofluid overlaid diffractive elements a differential loss mechanism is revealed, associated with the relative light polarization direction and the magnetic field application direction. The results were used for performing modal profile simulations of ferrofluid immersed D-shape optical fiber. It is demonstrated that such an optical system can act as a magnetic field sensor with field angle and intensity sensing capabilities.
一种浸入铁磁流体的D形光纤，相对于围绕其纵轴放置的方位角旋转磁场，表现出高达12 dB的差分损耗，这体现在其测量的传输功率中。通过使用覆盖铁磁流体的衍射元件研究磁致折射率和损耗变化，揭示了一种与相对光偏振方向和磁场施加方向相关的差分损耗机制。这些结果被用于对浸入铁磁流体的D形光纤进行模式轮廓模拟。结果表明，这样的光学系统可以作为一种具有场角和强度传感能力的磁场传感器。
