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Measurements of mode field diameter and effective area of photonic crystal fibers by far-field scanning technique

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Abstract

We have demonstrated that the correction factor k n = A eff/(πw 2), where ω = MFD/2 (MFD: mode field diameter), is above 1.20 for photonic crystal fibers (PCFs) with structural parameters in the range of d/Λ ≅ 0.40 to 0.90 (d/Λ ratio of hole diameter d and pitch Λ). By using the far-field scanning (FFS) technique and the finite difference method, the results of experimental measurements and numerical simulations differed by only 0.9 to 3.0% for two types of PCFs. The finding that k n ≠ 1.0 for PCFs indicates that their electrical field distribution is non-Gaussian and cannot be determined by assuming a conventional step-index distribution for PCFs. It was also found that the ITU-T Petermann II definition is the most suitable for MFD measurements of PCFs with non-Gaussian distribution.

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Authors and Affiliations

  1. Electrical and Electronics Engineering, Faculty of Engineering, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa, 903-0213, Japan

    Kazuya Miyagi & Yoshinori Namihira

  2. Graduate School of Engineering and Science, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa, 903-0213, Japan

    S. M. Abdur Razzak, Shubi F. Kaijage & Feroza Begum

Authors
  1. Kazuya Miyagi
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  2. Yoshinori Namihira
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  3. S. M. Abdur Razzak
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  4. Shubi F. Kaijage
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  5. Feroza Begum
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Correspondence to Kazuya Miyagi.

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Miyagi, K., Namihira, Y., Razzak, S.M.A. et al. Measurements of mode field diameter and effective area of photonic crystal fibers by far-field scanning technique. OPT REV 17, 388–392 (2010). https://doi.org/10.1007/s10043-010-0072-x

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