Erratum: Measurement of resonant bend loss in anti-resonant hollow core optical fiber (Optics Express (2017) 25: 17 (20612–20621) DOI: 10.1364/OE.25.020612)

An error on the part of the authors in drafting resulted in Eq. (3) being incorrect in the published paper [Opt. Express 25, 20612 (2017)]. We present a corrected version of the equation. It should be noted that this does not affect the presented results or conclusions of the paper. Published by Optica Publishing Group under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. 1. Erratum Equation (3) in our published paper [1] was incorrect. This equation should not have had a square root. Equation (1), below, shows the corrected form of this equation. The theoretically calculated data in Figs. 5 and 6 of the manuscript reflect the correct equation. Neither the results nor the conclusions of the paper are affected. (Formular presented) where R_c,l,m is the critical bend radius of the specific resonant bend loss corresponding to coupling between a specific core and cladding mode, d_c is the effective distance between the core and the c^th capillary projected onto the plane of the bend, while n_l,m(λ)_core and n_l,m(λ)_cladding are the effective indices of the specific core and cladding modes.