@inproceedings{bc97f88089a64f29ba22539c1a648e52,
title = "Focal ratio degradation: a new perspective",
abstract = "We have developed an alternative FRD empirical model for the parallel laser beam technique which can accommodate contributions from both scattering and modal diffusion. It is consistent with scattering inducing a Lorentzian contribution and modal diffusion inducing a Gaussian contribution. The convolution of these two functions produces a Voigt function which is shown to better simulate the observed behavior of the FRD distribution and provides a greatly improved fit over the standard Gaussian fitting approach. The Voigt model can also be used to quantify the amount of energy displaced by FRD, therefore allowing astronomical instrument scientists to identify, quantify and potentially minimize the various sources of FRD, and optimise the fiber and instrument performance.",
keywords = "Astronomical instrumentation, Focal ratio degradation, FRD, Optical fiber, Scattering, Surface roughness",
author = "Haynes, {Dionne M.} and Withford, {Michael J.} and Dawes, {Judith M.} and Roger Haynes and Joss Bland-Hawthorn",
year = "2008",
doi = "10.1117/12.788735",
language = "English",
isbn = "9780819472281",
volume = "7018",
series = "Proceedings of SPIE",
publisher = "SPIE",
pages = "70182U--1--70182U--8",
editor = "Eli Atad-Ettedgui and Dietrich Lemke",
booktitle = "Advanced optical and mechanical technologies in telescopes and instrumentation",
address = "United States",
}