Validity condition of separating dispersion of PCFs into material dispersion and geometrical dispersion |
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| Authors: | Wei Wang Lantian Hou Zhaolun Liu Guiyao Zhou |
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| Institution: | 1. Institute of Infrared Optical Fibres and Sensors,Yanshan University,Qinhuangdao 066004,China;Key Laboratory of Metaztable Materials Science and Technology,Yanshan University,Qinhuangdao 066004,China
2. Institute of Infrared Optical Fibres and Sensors,Yanshan University,Qinhuangdao 066004,China |
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| Abstract: | When using normalized dispersion method for the dispersion design of photonic crystal fibers(PCFs),it is vital that the group velocity dispersion of PCF can be seen as the sum of geometrical dispersion and material dispersion.However,the error induced by this way of calculation will deteriorate the final results.Taking 5 ps/(km·nm)and 5% as absolute error and relative error limits,respectively,the structure parameter boundaries of PCFs about when separating total dispersion into geometrical and material components is valid are provided for wavelength shorter than 1700 nm.By using these two criteria together,it is adequate to evaluate the simulatcd dispersion of PCFs when normalized dispersion method is employed. |
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