supported by the National Natural Science Foundation of China (No. 60807023);the Fundamental Research Funds for the Central Universities;the Scientific Research Foundation for the Returned Overseas Chinese Scholars;the State Education Ministry;the Anhui Key Laboratory of Optoelectronic Science and Technology
Using conventional coupled-mode theory, a set of coupled-mode equations are formulated for single-helix chiral fiber long-period gratings. A helical-core fiber is analyzed as an example. The analysis is simple in math...