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Gray DR, Sandoghchi SR, Wheeler NV, et al. Accurate calibration of S(2) and interferometry based multimode fiber characterization techniques. Opt Express. 2015;23(8):10540-52doi: 10.1364/OE.23.010540.
Gray, D. R., Sandoghchi, S. R., Wheeler, N. V., Baddela, N. K., Jasion, G. T., Petrovich, M. N., Poletti, F., & Richardson, D. J. (2015). Accurate calibration of S(2) and interferometry based multimode fiber characterization techniques. Optics express, 23(8), 10540-52. https://doi.org/10.1364/OE.23.010540
Gray, D R, et al. "Accurate calibration of S(2) and interferometry based multimode fiber characterization techniques." Optics express vol. 23,8 (2015): 10540-52. doi: https://doi.org/10.1364/OE.23.010540
Gray DR, Sandoghchi SR, Wheeler NV, Baddela NK, Jasion GT, Petrovich MN, Poletti F, Richardson DJ. Accurate calibration of S(2) and interferometry based multimode fiber characterization techniques. Opt Express. 2015 Apr 20;23(8):10540-52. doi: 10.1364/OE.23.010540. PMID: 25969094.
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Opt Express. 2015 Apr 20;23(8):10540-52. doi: 10.1364/OE.23.010540.

Accurate calibration of S(2) and interferometry based multimode fiber characterization techniques.

Optics express

D R Gray, S R Sandoghchi, N V Wheeler, N K Baddela, G T Jasion, M N Petrovich, F Poletti, D J Richardson

PMID: 25969094 DOI: 10.1364/OE.23.010540

Abstract

We present a novel method to validate the relative amount of power carried by high order modes in a multimode fiber using a Spatial and Spectral (S(2)) imaging technique. The method can be utilized to calibrate the S(2) set-up and uses Fresnel reflections from a thin glass plate to compare theoretical values with experimental results. We have found that, in the most general case, spectral leakage and sampling errors can lead S(2) to underestimate the multipath interference (MPI) of high order modes by several decibels, thus significantly impairing the result of the measurement. On the other hand, by applying suitable corrections as described in this work, we demonstrate that the S(2) produces MPI estimates that are accurate to within 1dB or better.

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