Novel design of broadband dispersion compensating photonic crystal fiber with all solid structure and low index difference
| Autor: | Chao Wang, Chunlan Zhang, Wei Wang, Qu Yuwei, Lantian Hou, Ying Han, Yuefeng Qi, Yu-Ting Zuo |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Coupling loss business.industry Bend radius 02 engineering and technology 01 natural sciences Graded-index fiber Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials 010309 optics Wavelength 020210 optoelectronics & photonics Optics Zero-dispersion wavelength 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Dispersion-shifted fiber Electrical and Electronic Engineering business Refractive index Photonic-crystal fiber |
| Zdroj: | Optik. 156:279-288 |
| ISSN: | 0030-4026 |
| Popis: | 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 μm2 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. |
| Databáze: | OpenAIRE |
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