Current Optics and Photonics

  • 제2권6호
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  • Pages.525-531
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  • 2018
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  • 2508-7266(pISSN)
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  • 2508-7274(eISSN)
한국광학회 (Optical Society of Korea)
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Dispersion and Nonlinear Properties of Elliptical Air Hole Photonic Crystal Fiber

  • Rao, MP Srinivasa (Department of Basic Sciences and Humanities, GMR Institute of Technology) ;
  • Singh, Vivek (Department of Physics, Banaras Hindu University)
  • 투고 : 2018.07.17
  • 심사 : 2018.11.26
  • 발행 : 2018.12.25
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초록

The effect of eccentricity on dispersion and nonlinear properties of a photonic crystal fiber having elliptical air holes is investigated using a fully vectorial effective index method. It is found that the effective refractive index increases with increase of eccentricity. The dependence of dispersion and nonlinear properties of the PCF on the eccentricity of the air hole is investigated. It is revealed that eccentricity of the air hole affects the zero dispersion wavelength. Further, the nonlinear properties such as mode field area, nonlinear coefficient and self phase modulation of the Photonic crystal fibers are analyzed. The mode field area increases and the nonlinear coefficient decreases with increase in eccentricity. The variation of the self phase modulation with elliptical air hole is also discussed.

키워드

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FIG. 1. Cross-sectional view of the elliptical air hole photonic crystal fiber.

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FIG. 2. Variation of effective cladding refractive index (neff,cl) of PCF as a function of wavelength for different eccentricity values of air hole for Λ = 2.2 μm and a = 0.52 μm.

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FIG. 3. Variation of dispersion as a function wavelength with varying eccentricity of air hole for Λ = 2.2 μm and a = 0.52 μm.

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FIG. 4. Effective area of a PCF as a function of wavelength for different eccentricity of air hole at Λ = 2.2 μm and a = 0.52 μm.

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FIG. 6. (a) Calculated SPM broaden spectrum of the Gaussian pulse at eccentricity e = 0.2 for L = 0.6 Km, (b) Pulse propagation along the length 0.6 Km for e = 0.2. (c) Calculated SPM broaden spectrum of the Gaussian pulse at eccentricity e = 0.6 for L = 0.6 Km, (d) Pulse propagation along the length 0.6 Km for e = 0.6.

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FIG. 5. Nonlinear coefficient variation of a PCF as a function of wavelength for different eccentricity values of air hole for at Λ = 2.2 μm and a = 0.52 μm.

TABLE 1. Comparison of Zero dispersion wavelengths

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