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...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.展开更多
Since its founding in 1993, the China Society for Human Rights Studies （CSHRS） has extensively participated inthe human rights work of the United Nations （UN） and has actively carried out international exchange an...Since its founding in 1993, the China Society for Human Rights Studies （CSHRS） has extensively participated inthe human rights work of the United Nations （UN） and has actively carried out international exchange and cooperation. In May 2012, the UN Human Rights Council （UNHRC） initiated the second round of country reviews on human rights.展开更多
Wherever the first life originated, the Earth has grown organisms. The Earth provides life with all the basicelements required for the composition and growth of life. And of more importance is that the Earth has
文摘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.
文摘Since its founding in 1993, the China Society for Human Rights Studies （CSHRS） has extensively participated inthe human rights work of the United Nations （UN） and has actively carried out international exchange and cooperation. In May 2012, the UN Human Rights Council （UNHRC） initiated the second round of country reviews on human rights.
文摘Wherever the first life originated, the Earth has grown organisms. The Earth provides life with all the basicelements required for the composition and growth of life. And of more importance is that the Earth has
