A Proposed Method for a Photon-Counting Laser Coherence Detection System to Complement Optical SETI
arXiv:1902.05371 · doi:10.1088/1538-3873/ab1a46
Abstract
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 photon sensitive detectors and a modulating asymmetric interferometer has been modelled. 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 sm against a background with a spectral bandwidth of 0.1nm over an observation time of 750s.
17 pages, 7 figures
References in corpus (10)
- Atmospheric Scintillation in Astronomical Photometry
- A Search for Laser Emission with Megawatt Thresholds from 5600 FGKM Stars
- Optical SETI: A Spectroscopic Search for Laser Emission from Nearby Stars
- A Search for Brief Optical Flashes Associated with the SETI Target KIC 8462852
- Optical SETI Observations of the Anomalous Star KIC 8462852
- OSETI with STACEE: A Search for Nanosecond Optical Transients from Nearby Stars
- Discovery of peculiar periodic spectral modulations in a small fraction of solar type stars
- Interstellar communication. X. The colors of optical SETI
- A near-infrared SETI experiment: probability distribution of false coincidences
- Periodic Spectral Modulations Arise from Non-random Spacing of Spectral Absorption Lines