Abstract
In this paper, the mode coupling mechanism of tilted fiber Bragg gratings (TFBGs) is briefly introduced at first. And a general review on the fabrication, theoretical and experimental research development of TFBGs is presented from a worldwide perspective, followed by an introduction of our current research work on TFBGs at the Institute of Modern Optics, Nankai University (IMONK), including TFBG sensors for single-parameter measurements, temperature cross sensitivity of TFBG sensors, and TFBG-based interrogation technique. Finally, we would make a summary of the related key techniques and a remark on prospects of the research and applications of TFBGs.
Highlights
With the rapid development of fiber-optic component fabrication technique, fiber gratings have become typical and promising passive optical components that have been widely applied in the field of optical communications and optical sensing technology
A general review on the fabrication, theoretical and experimental research development of tilted fiber Bragg gratings (TFBGs) is presented from a worldwide perspective, followed by an introduction of our current research work on TFBGs at the Institute of Modern Optics, Nankai University (IMONK), including TFBG sensors for single-parameter measurements, temperature cross sensitivity of TFBG sensors, and TFBG-based interrogation technique
Due to the limitation of fiber photosensitivity and fiber fabrication technique, early studies on fiber gratings were focused on fiber Bragg gratings until 1990, when Meltz et al firstly presented the mode coupling model of tilted fiber Bragg grating (TFBG) and preliminarily discussed about its radiation modes at an Optical Fiber Communication (OFC) conference [7]
Summary
Xiaoyi DONG et al.: Tilted Fiber Bragg Gratings: Principle and Sensing Applications important multi-functional fiber gratings with novel structure and new characteristics have attracted considerable research interest in the past few decades. Compared with conventional FBG-based photonic components, TFBGs with quasi-three dimensional structure promise a good variety of interactions between photons. Different from FBGs, the wave vector of TFBG has a certain angle with respect to the fiber axis, and the grating has different structural geometry along radial, azimuth, and axial orientations, making TFBG a good candidate for multi-functional fiber-optic component with new characteristics. A general review on the research development of TFBGs is presented. The mode coupling mechanism of TFBGs is briefly introduced firstly, followed by a comprehensive review on the worldwide development of the related fabrication, theoretical and experimental research.
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