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Optica Publishing Group
  • International Quantum Electronics Conference
  • 1996 OSA Technical Digest Series (Optica Publishing Group, 1996),
  • paper ThP2

Individual and sequential quantum nondemolition measurements with a squeezed-light beamsplitter

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The beamsplitter is the simplest optical measurement device. It is phase-insensitive, and thus the measurement precision and signal preservation (expressed by the signal-to-noise ratio (SNR) transfer coefficients TM and Ts) can not simultaneously be perfect for measurements of a particular electric field quadrature. The degradation of the SNR is due to vacuum fluctuations entering through the unused beamsplitter port, limiting the sum Ts + TM to 1. By replacing the vacuum with squeezed light, ideal quantum nondemolition (QND) properties are predicted to be achievable in the limit of perfect squeezing. [1]

© 1996 Optical Society of America

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