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has been cited by the following article:

• TITLE: On the Validity of the Effective Index Method for Long Period Grating Photonic Crystal Fibers

  AUTHORS: Dhia Khadri, Walid Belhadj, Douha Gamra, Fathi AbdelMalek, Habib Bouchriha

  KEYWORDS: Long Period Gratings Photonic Crystal Fiber (LPG-PCF); Improved Effective Index; MMP; Cladding Modes; Sensor; Sensitivity

  JOURNAL NAME: Materials Sciences and Applications, Vol.3 No.5, May 22, 2012

  ABSTRACT: This paper focuses on the investigation of modal characteristics and sensing properties of long period grating photonic crystal fibers (LPG-PCFs). An improved effective index method is employed with an objective to study its limitations for various designs of LPG-PCFs. Results so obtained with the above method are compared with the corresponding values of multiple multipole (MMP) method results which points the range of validity and applicability of the improved effective index method to LPG-PCFs. It is shown that this method is excellent when the surrounding media is assumed to be air. However, it becomes less accurate when the fiber is immersed into a liquid with a refractive index close to that of the cladding.