A Proposed Method for a Photon-counting Laser Coherence Detection System to Complement Optical SETI


The detection of laser radiation originating from space is a positive indicator of Extra Terrestrial Intelligence (ETI).Thus far, the optical search for ETI (OSETI) has looked for enhanced brightness in the form of either narrow-band spectral emission or time correlated photons from laser pulses. In this paper, it is proposed to look for coherence properties of incoming light in a manner that can distinguish against atomic emission lines. The use of photonsensitive detectors and a modulating asymmetric interferometer has been modeled. The results suggest that the sensitivity of detection for continuous laser sources would be better than current spectroscopic approaches, with detection thresholds of <1 photon s−1 m−2 against a background with a spectral bandwidth of 0.1 nm over an observation time of 750 s.

Publication DOI: https://doi.org/10.1088/1538-3873/ab1a46.
Divisions: College of Engineering & Physical Sciences
College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: © 2019 The Author
Uncontrolled Keywords: Coherence,Photon counting,Seti,Astronomy and Astrophysics,Space and Planetary Science
Publication ISSN: 1538-3873
Last Modified: 19 Feb 2024 08:25
Date Deposited: 20 Jun 2019 10:15
Full Text Link: https://arxiv.o ... /1902.05371.pdf
Related URLs: https://iopscie ... 873/ab1a46/meta (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2019-05-22
Accepted Date: 2019-04-10
Authors: Benton, David (ORCID Profile 0000-0003-0663-1404)



Version: Draft Version

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