Empirical Study of Helical Bend Loss in Optical Fibers

Ashitosh Velamuri, Ishan Sharma, Shakti Gupta, Pradeep Krishnamurthy

2019

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.

Paper Citation

in Harvard Style

Velamuri A., 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

in Bibtex Style

@conference{photoptics19,
author={Ashitosh Velamuri and Ishan Sharma and Shakti Gupta and Pradeep 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},
}

in EndNote Style

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 A.
AU - Sharma I.
AU - Gupta S.
AU - Krishnamurthy P.
PY - 2019
SP - 229
EP - 234
DO - 10.5220/0007407402290234