Journal
OPTIK
Volume 156, Issue -, Pages 279-288Publisher
ELSEVIER GMBH, URBAN & FISCHER VERLAG
DOI: 10.1016/j.ijleo.2017.10.160
Keywords
Photonic crystal fiber; Broadband dispersion compensation; All solid; Low index difference
Categories
Funding
- National Natural Science Foundation of China [61405173, 61405172]
- Open Subject of Jiangsu Key Laboratory of Meteorological Observation and Information Processing [KDXS1107]
- College Science Research Program of Hebei Province [BJ2017108]
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By employing germanium up-doped and fluorine/boron down-doped cylindrical inclusions instead of air-holes in pure silica, a novel kind of broadband dual concentric core dispersion compensating photonic crystal fiber (DCC-DCPCF) with all solid structure and low index difference is proposed. By analyzing the kappa value's influences on the dispersion compensating behavior, it is found that the DCC-DCPCF whose kappa curve intersects twice with that of compensated fiber in the targeted band is most preferable for ultra-broadband dispersion compensation. The bandwidth of the DCC-DCPCF can be readily managed by tuning the position and the interval of the two kappa matched wavelength. Following the design procedure of broadband DCC-DCPCF given in this paper, an all solid DCC-DCPCF aims at compensating the accumulated dispersion of Corning SMF28 fiber in entire S + C band are designed. Negative dispersion ranging from -183 to -281 ps/(nm km) in S + C bands is achieved with the refractive index differences between matrical material and cylindrical inclusions no more than 0.03. Numerical results show that the DCC-DCPCF can compensate 15.43 times its length of Corning SMF28 fiber with small residual dispersion in the range of +/- 0.15 ps/(nm km). The calculated effective mode area is 16.01 mu m(2) at 1550 nm, corresponding to a coupling loss of 1.35 dB to the Corning SMF28 fiber, the confinement loss and bending loss with 1 cm bending radius less than 0.058 dB/km and 0.315 dB/km at 1550 nm, respectively. (C) 2017 Elsevier GmbH. All rights reserved.
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