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Authors: Ashitosh Velamuri 1 ; Ishan Sharma 2 ; Shakti Gupta 2 and Pradeep Krishnamurthy 1

Affiliations: 1 Centre for Lasers and Photonics, Indian Institute Technology Kanpur, Kalyanpur, Kanpur, India ; 2 Department of Mechanical Engineering, Indian Institute Technology Kanpur, Kanpur, India

ISBN: 978-989-758-364-3

Keyword(s): Helical Bend Loss, In-plane Bend Loss, Empirical Formula, Analytical Loss Formula.

Abstract: We propose a method to estimate helical bend loss in optical fibers and extend the method to predict the loss in a different fiber. In our approach, we consider the in-plane bend loss as the reference and approximate the loss curve as an exponential function decaying with bend diameter. For in-plane bends, we compute loss over the bend diameter range of 9.5−19.5 mm at 1550 nm wavelength. For helical bends, we perform experiments for the same range of bend diameters and pitch values of 2,4,5,7 and 10 mm. We extend the exponential function approximation to the experimental measurements of helically wound fibers and obtain an empirical formula to estimate the helical bend loss. We find that for a given bend diameter, the bend loss increases initially with the pitch, attains a maximum value and then decreases below the corresponding in-plane bend loss. We extend the empirical formula developed for a single fiber with a specific refractive index to evaluate the helical bend loss in another fiber. We conduct the in-plane bend loss experiments for the new fiber and repeat the exponential fit and obtain fit coefficients. We calculate the fit coefficients for different pitch values using empirical formula and predict the helical bend loss. We compare the predicted loss with corresponding experimental measurements, which are in good agreement. (More)

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Paper citation in several formats:
Velamuri, Ashitosh; Sharma, I.; Gupta, S. and Krishnamurthy, P. (2019). Empirical Study of Helical Bend Loss in Optical Fibers.In Proceedings of the 7th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS, ISBN 978-989-758-364-3, pages 229-234. DOI: 10.5220/0007407402290234

@conference{photoptics19,
author={Velamuri, Ashitosh and Ishan Sharma. and Shakti Gupta. and Pradeep Kumar Krishnamurthy.},
title={Empirical Study of Helical Bend Loss in Optical Fibers},
booktitle={Proceedings of the 7th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS,},
year={2019},
pages={229-234},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0007407402290234},
isbn={978-989-758-364-3},
}

TY - CONF

JO - Proceedings of the 7th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS,
TI - Empirical Study of Helical Bend Loss in Optical Fibers
SN - 978-989-758-364-3
AU - Velamuri, Ashitosh
AU - Sharma, I.
AU - Gupta, S.
AU - Krishnamurthy, P.
PY - 2019
SP - 229
EP - 234
DO - 10.5220/0007407402290234

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