@inproceedings{db8a82ea516d43269c1e4b3117a2b892,
title = "Aperiodic multi-notch FBG filters for astronomical positronium detection",
abstract = "Current astronomical detection of Positronium (Ps) atoms through gamma-ray emission is inherently limited by a 3-degree angular resolution. Alternatively, the triplet state of Ps is capable of producing a recombination spectrum in the near-infrared band, which would provide the potential to increase the angular resolution by a factor of 104. The most promising signature is the Ps Balmer alpha line (Psα) at 1312.22nm. This observation scheme has never been implemented from ground-based telescopes due to the bright airglow. Now, the FBGbased OH suppression technique presents a promising solution for removing airglow emission lines surrounding the target signature. In this proceeding, we present the design and fabrication details of the first astronomy J-band FBG filters and early results of the OH suppression unit specifically developed for Ps detection.",
keywords = "Aperiodic FBG, Astrophotonics, OH Suppression, Positronium",
author = "Qingshan Yu and Liguo Luo and G{\"o}ran Edvell and Christopher Betters and Jin Wei and Simon Ellis and Joss Bland-Hawthorn and Sergio Leon-Saval",
year = "2023",
doi = "10.1117/12.3008044",
language = "English",
isbn = "9781510672369",
series = "Proceedings of SPIE",
publisher = "SPIE",
pages = "129650D--1--129650D--9",
editor = "Yongtian Zhu and Suijian Xue and Quentin Parker",
booktitle = "AOPC 2023",
address = "United States",
note = "2023 Applied Optics and Photonics China: Novel Technologies and Instruments for Astronomical Imaging and Spectroscopy, AOPC 2023 ; Conference date: 25-07-2023 Through 27-07-2023",
}