Astrophotonics is the application of photonics to astronomical instrumentation. It is a rapidly developing field that takes a new approach to instrumentation, in which the bulk optics of traditional instruments, such as lenses, mirrors, and diffraction gratings, are replaced with devices embedded within waveguides. This enables instruments that are smaller, modular, more stable, and most excitingly, with optical capabilities not possible with traditional instruments. Astrophotonics has reached a stage of development where many prototype devices are now being tested on sky, and the first fully-fledged instruments incorporating photonic devices are now being used for observations. The field is thus transitioning from one of instrumental research and development to mainstream observational astrophysics. This is the first book focussed on astrophotonics, written by three experts in the field. Beginning with a sound introduction to the basic principles of astrophotonics, it is intended to communicate the current status, potential, and future possibilities of astrophotonics to the wider astronomical, optics and photonics communities.

About the Author

Simon Ellis is an Associate Professor at Macquarie University where he is the head of the Instrument Science Group, which is responsible for research and development in astronomical instrumentation and technologies. He has over 20 years experience of research in astronomy and astrophysics, including instrumentation research and development, the evolution of galaxies and clusters of galaxies, and the astrophysics of positronium. He has played a leading role in the development of astrophotonics, most notably in the field of OH suppression. He was the commissioning scientist for the world's first two instruments to use fibre Bragg gratings for OH suppression. He is currently leading the development of this technology for use on the European Southern Observatory's Very Large Telescope. He has published foundational papers in the use of silicon photonics for astronomy. He has been invited to speak on astrophotonics at major photonics and astronomy conferences, and was guest editor for a feature issue on astrophotonics in the Journal of the Optical Society of America B.

Joss Bland-Hawthorn is a Laureate Professor of Physics, and Director of the Sydney Institute for Astronomy, The University of Sydney. He has more than 30 years experience in astrophysics and astronomical instrumentation. In 2000, he founded the field of astrophotonics, now a major subfield of photonics. With T A Birks/Timothy A Birks and Sergio Leon-Saval he developed (and named) the photonic lantern, a device that is finding wider use in science and industry. He has developed and introduced many other enabling technologies, including OH suppressing fibre Bragg gratings (with Simon Ellis), hexabundles, photonic microspectrograph concepts, tunable filters, and so forth.

Sergio Leon-Saval is an Associate Professor at the School of Physics in The University of Sydney where he is now Director of the Sydney Astrophotonics Instrumentation Laboratory (SAIL), and Deputy Director of the Institute of Photonics and Optical Science (IPOS). He has more than 16 years of experience in the research area of photonics, and made breakthrough contributions in the fields of specialty optical fibres and astrophotonics, including the co-invention and pioneering the development of the photonic lantern technology, a corner stone of astrophotonics. He has published over 85 international refereed journal papers and more than 190 conference proceedings papers since 2004 with over 7400 citations, and an h-index of 42. A/Prof Leon-Saval has been a member of technical program and management committees on more than 10 international conferences. He is a Senior Member of the Optica (OSA), and elected Council Member of the Australian Optical Society (AOS). He was the 2019 recipient of the AOS John Love Award, which recognizes innovations and technical advances in the field of optics.

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