TEM10 homodyne detection as an optimal small displacement and tilt measurements scheme

Abstract

We report an experimental demonstration of optimal measurements of small displacement and tilt of a Gaussian beam - two conjugate variables - involving a homodyne detection with a TEM10 local oscillator. We verify that the standard split detection is only 64% efficient. We also show a displacement measurement beyond the quantum noise limit, using a squeezed vacuum TEM10 mode within the input beam.

9 pages, 8 figures

References in corpus (2)

• Quantum limits in the measurement of very small displacements in optical images
• Generation of Squeezing in Higher Order Hermite-Gaussian Modes with an Optical Parametric Amplifier

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