Optical Detection of Lasers with Near-term Technology at Interstellar Distances

  title={Optical Detection of Lasers with Near-term Technology at Interstellar Distances},
  author={James R. Clark and Kerri L. Cahoy},
  journal={The Astrophysical Journal},
This paper examines the ability to produce a laser beam detectable to a cursory survey (SNR 0.1% with a 1 m receive telescope) by an extraterrestrial intelligence using proven or near-term technology (megawatt-class lasers, telescopes tens of meters in size). We find that such lasers can produce a signal at ranges of less than 20,000 lt-yr, with a broad enough beam to overcome uncertainties in nearby exoplanet orbits (e.g., Prox Cen b) or encompass entire habitable zones of more distant systems… 

Model of the Search for Extraterrestrial Intelligence with Coronagraphic Imaging

We present modeled detection limits of the Gemini Planet Imager (GPI) and the Wide-Field Infrared Space Telescope (WFIRST) to an optical and infrared laser which could be used by an extraterrestrial

Nonparametric Approach to Weak Signal Detection in the Search for Extraterrestrial Intelligence (SETI)

The Bootstrap Error-adjusted Single-sample Technique is shown to outperform the more traditional Mahalanobis metric in analysis of SETI data from a Project Argus near infrared telescope and an extension to examine multiple samples (subclusters of data) simultaneously is explored.

Solar One: A Proposal for The First Crewed Interstellar Spacecraft

Key challenges are reducing the weight of continuous-wave lasers and compact fusion reactors as well as achieving cryo-sleep and artificial gravity.

Astrometric study of Gaia DR2 stars for interstellar communication

Abstract We discuss the prospects of high precision pointing of our transmitter to habitable planets around Galactic main sequence stars. For an efficient signal delivery, the future sky positions of

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

  • D. Benton
  • Physics
    Publications of the Astronomical Society of the Pacific
  • 2019
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



A Search for Laser Emission with Megawatt Thresholds from 5600 FGKM Stars

We searched high-resolution spectra of 5600 nearby stars for emission lines that are both inconsistent with a natural origin and unresolved spatially, as would be expected from extraterrestrial

Implications of directed energy for SETI

  • P. Lubin
  • Physics
    Optical Engineering + Applications
  • 2016
We compute the detectability of directed-energy (DE) sources from distant civilizations that may exist. Recent advances in our own DE technology suggest that our eventual capabilities will radically


The primary challenge of rocket propulsion is the burden of needing to accelerate the spacecraft’s own fuel, resulting in only a logarithmic gain in maximum speed as propellant is added to the

EXPRES: a next generation RV spectrograph in the search for earth-like worlds

The EXtreme PREcision Spectrograph (EXPRES) is an optical fiber fed echelle instrument being designed and built at the Yale Exoplanet Laboratory to be installed on the 4.3-meter Discovery Channel

Berkeley radio and optical SETI programs: SETI@home, SERENDIP, and SEVENDIP

We present results from two radio and two optical SETI programs at the University of California, Berkeley: The SERENDIP IV sky survey searches for narrow band radio signals at the 305 meter Arecibo


Planets embedded within debris disks gravitationally perturb nearby dust and can create clumpy, azimuthally asymmetric circumstellar ring structures that rotate in lock with the planet. The Earth

Overview of high-rate deep-space laser communications options

A set of options leading to a 10-100 Mbps link from Mars to Earth is described, and a low noise photon-counting detectors and turbo-codes are described.

Terrestrial Planet Finder coronagraph

This paper and oral presentation will describe the technology studies, the testbeds, and the architecture studies that will enhance the understanding and viability of a Terrestrial Planet Finder

Improved optical SETI detector

Two-detector optical SETI systems have experienced a surprising incidence of false positive signals. We describe a three-detector system designed to alleviate this difficulty. The device will be