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Updated: May 21, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
Superbunched bright squeezed vacuum state.
T Sh Iskhakov1, A M Pérez, K Yu Spasibko
1Max Planck Institute for the Science of Light, Guenther-Scharowsky-Str. 1/Bldg. 24, Erlangen 91058, Germany. Timur.Iskhakov@mpl.mpg.de
We studied bright squeezed vacuum states with up to 10(13) photons per mode. Photon bunching and superbunching effects were observed in single-mode parametric down conversion radiation.
Area of Science:
- Quantum optics
- Nonlinear optics
Background:
- Bright squeezed vacuum states are crucial for quantum information processing.
- Parametric down conversion (PDC) is a key source for generating non-classical light states.
Purpose of the Study:
- To experimentally investigate the statistical properties of bright squeezed vacuum states.
- To analyze photon statistics in high-intensity single-mode PDC radiation.
Main Methods:
- Generation of bright squeezed vacuum states using high-gain parametric down conversion (PDC).
- Measurement of second-order intensity correlation functions (g(2)) using analog detectors.
- Characterization of photon statistics including bunching and superbunching.
Main Results:
- Experimental observation of photon bunching and superbunching in single-mode PDC radiation.
- Demonstration of statistical properties for states with up to 10(13) photons per mode (10 μJ per pulse).
Conclusions:
- The study provides experimental insights into the statistical behavior of bright squeezed vacuum states.
- Results confirm the presence of photon bunching and superbunching in high-intensity PDC sources, relevant for quantum technologies.
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