Faculty Publications
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Item Highly birefringent photonic crystal fiber with hybrid cladding(Academic Press Inc. apjcs@harcourt.com, 2019) Krishnan, K.; Malavika, R.A highly birefringent hybrid cladding photonic crystal fiber (PCF) is proposed in this article. The guiding properties of the proposed PCF are numerically investigated using the finite element method (FEM). This fiber exhibits very high birefringence in the order of10-2 at communication wavelengths. In addition, low confinement loss of 6.1 × 10?3 dB/km, lower negative dispersion of -274.5ps/nm/km and higher nonlinearity of 76.41W-1km-1 is achieved at the same wavelengths compared with the exist literature. The proposed simple cladding structure is easy for fabrication. Moreover, effective mode area and nonlinear coefficient are analyzed and optimized. The proposed fiber can prove its applications in sensing, telecommunication and non-linear technologies. © 2018 Elsevier Inc.Item Design optimization of a highly sensitive spiral photonic crystal fiber for liquid and chemical sensing applications(Academic Press Inc. apjcs@harcourt.com, 2019) Malavika, R.; Krishnan, P.In this paper, a spiral shaped photonic crystal fiber (PCF)is proposed for liquid sensing applications. The guiding properties of the proposed PCF are analysed. Sensitivity coefficient is analysed by varying different structural parameters for a wider wavelength range. In addition, confinement loss is also studied at the same wavelengths. The relative sensitivity achieved for the optimized parameters are 56.8%, 58.3% and 62.7% for water (n = 1.33), propane (n = 1.34)and propylene (n = 1.36)respectively. With its low confinement loss and high sensitivity the proposed PCF can be used for liquid and chemical sensing applications. © 2019 Elsevier Inc.