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Updated: May 5, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
Beyond spectral homodyne detection: complete quantum measurement of spectral modes of light
F A S Barbosa1, A S Coelho, K N Cassemiro
1Instituto de Física, Universidade de São Paulo, P.O. Box 66318, 05315-970 São Paulo, São Paulo, Brazil.
Abstract:
Spectral homodyne detection, a widely used technique for measuring quantum properties of light beams, cannot retrieve all the information needed to reconstruct the quantum state of spectral field modes. We show that full quantum state reconstruction can be achieved with the alternative measurement technique of resonator detection. We experimentally demonstrate this difference by engineering a quantum state with features that go undetected by homodyne detection but are clearly revealed by resonator detection.
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