Review of Turn around Point Long Period Fiber Gratings

作     者：Monika Gambhir Shilpi Gupta 

作者机构：Department of Electronics & Communication Engineering SVNIT Surat India 

出 版 物：《Journal of Sensor Technology》 (传感技术（英文）)

年 卷 期：2015年第5卷第4期

页      面：81-89页

学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学] 

主　　题：LPFG (Long Period Fiber Grating) TAP (Turn around Point) SRI (Surrounding Refractive Index) LP (Linearly Polarized) 

摘      要：Long period fiber gratings are emerging as a potential candidate in the list of surrounding refractive index optical fiber sensors. Their sensitivity can be enhanced greatly if the grating period, fiber dimensions and surrounding refractive index are optimized in a way to operate at a point called turn around point on phase matching curves of these gratings. Turn around point LPFGs are well known for their ultrahigh sensitivity to external parameters. Potential of operating LPFG at or near turn around point has been investigated by many researchers in various applications including physical parameter sensing, adulteration detection, radiation dose, etc. Since TAP LPFGs are in investigation phase therefore a lot of rigorous & efficient work in finding techniques for optimizing their potential as sensor in chemical, biochemical, structural health monitoring is still to be carried out. A brief review of work carried out in this domain till now is presented here and key findings from literature review are highlighted.