2021/05/03 by Eloy Hernandez, E. Hernandez, Hernandez, E. +13
Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #FOS: Physical sciences #Instrumentation and Methods for Astrophysics (astro-ph.IM) #Optical Network Technologies #Photonic Crystal and Fiber Optics #astro-ph.IM
paper · pdf · doi:10.48550/arxiv.2105.00945
26 pages, 18 figures. Accepted to JOSAB April 2021
openalex publication_date 2021/05/03 · arxiv created 2021/05/04 · arxiv updated 2021/05/05 · openalex created_date 2021/05/10 · openalex updated_date 2026/07/28
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.