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QIAN Yan, LIU Min, YANG Jing, MA Yunhua. Analysis of coupling characteristics of square five-core photonic crystal fibers[J]. LASER TECHNOLOGY, 2014, 38(4): 455-458. DOI: 10.7510/jgjs.issn.1001-3806.2014.04.005
Citation: QIAN Yan, LIU Min, YANG Jing, MA Yunhua. Analysis of coupling characteristics of square five-core photonic crystal fibers[J]. LASER TECHNOLOGY, 2014, 38(4): 455-458. DOI: 10.7510/jgjs.issn.1001-3806.2014.04.005

Analysis of coupling characteristics of square five-core photonic crystal fibers

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  • Received Date: September 04, 2013
  • Revised Date: October 10, 2013
  • Published Date: July 24, 2014
  • To study the influence of the structure parameters of a square five-core photonic crystal fiber (PCF) on coupling characteristics, according to the characteristics of its five super-modes, a method to calculate the coupling length of the PCF was given. The effect of the wavelength and the structure parameters on the coupling characteristics of the PCF was numerically studied in detail with the finite element method. The results show that the coupling length increases with the increase of the core-to-core distance, air-filling ratio, core refractive index and core diameter. However, the coupling length decreases with the increase of the wavelength. The results will provide the theoretical foundations for the design of directional couplers based on five-core PCFs.
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