Fringe tracking with the FOURIER beam combiner at the MROI

Anders M. Jorgensen; John Young; Eugene Seneta; David Buscher

doi:10.1117/12.3021169

28 August 2024 Fringe tracking with the FOURIER beam combiner at the MROI

Anders M. Jorgensen, John Young, Eugene Seneta, David Buscher

Author Affiliations +

Proceedings Volume 13095, Optical and Infrared Interferometry and Imaging IX; 1309528 (2024) https://doi.org/10.1117/12.3021169
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

In commissioning the second telescope and first fringe observations at Magdalena Ridge Observatory Interferometer (MROI) the Free-space Optical multi-apertUre combineR for IntERferometry (FOURIER) will be used for fringe tracking during early commissioning while awaiting the readiness of the Infrared Coherencing Neares Neighbor (ICoNN) Tracker. FOURIER is an image plane beam combiner which can accommodate three beams and has wavelength coverage from approximately 1μm to 2.5μm in approximately 10² wavelength channels, resulting in a spectral resolution of approximately 10². We have chosen to use a group-delay fringe-tracking approach and have implemented a configurable search-and-track algorithm. We have also created an operator interface for controlling the fringe tracker and displaying status information and data. A simulator that sends simulated data to the fringe tracker and accepts delay corrections from the fringe tracker can be used to test the fringe tracker under different conditions. We will describe the algorithms and their software implementation, as well as the user interface. Then we will present results of simulations showing expected fringe-tracking performance.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Anders M. Jorgensen, John Young, Eugene Seneta, and David Buscher "Fringe tracking with the FOURIER beam combiner at the MROI", Proc. SPIE 13095, Optical and Infrared Interferometry and Imaging IX, 1309528 (28 August 2024); https://doi.org/10.1117/12.3021169

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