Astrophotonics: introduction to the feature issue
2021
Astrophotonics is an emerging field that focuses on the development
of photonic components for astronomical instrumentation. With ongoing
advancements, astrophotonic solutions are already becoming an integral
part of existing instruments. A recent example is the €60M ESO GRAVITY
instrument at the Very Large Telescope Interferometer, Chile, that makes
heavy use of photonic components. We envisage far-reaching applications in
future astronomical instruments, especially those intended for the new
generation of extremely large telescopes and in space. With continued
improvements in extreme adaptive optics, the case becomes increasingly
compelling. The joint issue of JOSA B and Applied Optics features more
than 20 state-of-the-art papers in diverse areas of astrophotonics. This
introduction provides a summary of the papers that cover several important
topics, such as photonic lanterns, beam combiners and interferometry,
spectrographs, OH suppression, and coronagraphy.
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