We investigated the modal properties of complex refractive-index core photonic crystal fibers (PCFs) with the supercell model. The validity of the approach is shown when we compare our results with those reported earlier on a step complex refractive-index profile. The imaginary part of the electric field results in wave-front distortion in the complex refractive-index profile PCFs, which means that the power flows out or into the doped region according to the sign of the imaginary part of the refractive index. A simple formula is proposed for calculating the gain or loss coefficients of these fibers. The numerical results obtained by the approximation formula agree well with the full-vectorial results.
© 2004 Optical Society of AmericaFull Article | PDF Article
Albert Ferrando, Enrique Silvestre, Juan José Miret, Pedro Andrés, and Miguel V. Andrés
J. Opt. Soc. Am. A 17(7) 1333-1340 (2000)
Wang Zhi, Ren Guobin, Lou Shuqin, and Jian Shuisheng
Opt. Express 11(9) 980-991 (2003)
Marcin Szpulak, Waclaw Urbanczyk, Evgenii Serebryannikov, Aleksei Zheltikov, Amit Hochman, Yehuda Leviatan, Rafal Kotynski, and Krassimir Panajotov
Opt. Express 14(12) 5699-5714 (2006)