Optical Lasers for CETI

Abstract

Present research supporting SETI and CETI is entirely focused upon microwave wavelengths and technologies. This paper demonstrates that there are compelling reasons why the search should be broadened to optical wavelengths. New perceptions regarding the feasibility of optical laser technologies, together with reassessments of signal-to-noise considerations, indicate both the feasibility and desirability of interstellar transmissions at infrared, visible, and ultraviolet wavelengths. Implicit in the rationale for SETI/CETI is the question of ultimate motivations. It is shown that use of the large bandwidths available at optical wavelengths greatly enhances the utility of such endeavors. Present astronomical equipment and methods are adequate for the initial detection, although specially constructed receiving equipment would be required for full decoding of the signals.