http://arxiv.org/abs/2105.00945
In astronomical spectroscopy, optical fibres are abundantly used for multiplexing and decoupling the spectrograph from the telescope to provide stability in a controlled environment. However, fibres are less than perfect optical components and introduce complex effects that diminish the overall throughput, efficiency, and stability of the instrument.
We present a novel numerical field propagation model that emulates the effects of modal noise, scrambling, and focal ratio degradation with a rigorous treatment of wave optics. We demonstrate that the simulation of the near- and far-field output of a fiber, injected into a ray-tracing model of the spectrograph, allows to assess performance at the detector level.
E. Hernandez, M. Roth, K. K.Petermann, et. al.
Tue, 4 May 21
69/72
Comments: 26 pages, 18 figures. Accepted to JOSAB April 2021
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