Phase-Sensitive Light Amplifiers in Stellar Interferometry

  • Hideya Gamo
Conference paper


The signal-to-noise ratio problems in stellar interferometry are serious in a manner somewhat similar to the case of gravitational wave detection. For instance, Hanbury Brown determined the diameters of 32 stars by his intensity interferometer [1]. Without some new technology development such as the squeezed state technique, there is not much chance for further improvement. As soon as the laser amplifier became available, I was interested in its possible applications to improve the sensitivity of the intensity interferometer. To my great disappointment I learned from Professor Charles Townes [2] that the (phase-insensitive) laser amplifier cannot improve the S/N but worsens the situation due to the excessive spontaneous emissions.


Quadrature Component Gravitational Wave Detection Parametric Amplifier Laser Amplifier Incident Light Wave 
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Copyright information

© Plenum Press, New York 1990

Authors and Affiliations

  • Hideya Gamo
    • 1
  1. 1.Department of Electrical EngineeringUniversity of California, IrvineIrvineUSA

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