Parametric downconversion vs optical parametric amplification: a comparison of their quantum statistics
نویسندگان
چکیده
The extent to which the intense light generated by an unseeded, high-gain optical parametric ampli®er retains the desired quantum statistical properties of the individual photon pairs generated by spontaneous parametric downconversion is analysed. It is shown that certain but not all of these properties are retained, with important implications for applications of quantum optics.
منابع مشابه
Spectral phase conjugation via extended phase matching
It is shown that the copropagating three-wave-mixing parametric process, with appropriate type-II extended phase matching and pumped with a short second-harmonic pulse, can perform spectral phase conjugation and parametric amplification, which shows a threshold behavior analogous to backward-wave oscillation. The process is also analyzed in the Heisenberg picture, which predicts a spontaneous p...
متن کامل6.453 Quantum Optical Communication Reading 20
The final major question we shall address this semester is the following. How can we create non-classical light beams that exhibit the signatures we’ve discussed in our simple one-mode and two-mode analyses? In particular, we will study spontaneous parametric downconversion and optical parametric amplification in secondorder nonlinear crystals. These closely-related processes have been and cont...
متن کاملSqueezed states of light from an optical parametric oscillator
Squeezed states of the electromagnetic field are generated by degenerate parametric downconversion in a subthreshold optical parametric oscillator. Reductions in photocurrent noise greater than 60% (-4 dB) below the limit set by the vacuum fluctuations of the field are observed in a balanced homodyne detector. A quantitative comparison with theory suggests that the observed noise reductions res...
متن کاملCorrelated imaging visibility using a parametric downconversion source seeded with partially coherent stimulation
We have studied a correlated imaging scheme using parametric downconversion stimulated with a partially coherent beam as a source. We analyze the dependence of quantum spatial correlations and image reconstruction features on the crystal length, the coherence length, and the transverse size of the seed beam in lowand high-gain regimes of parametric downconversion. We show that the visibility of...
متن کاملExperimental proposal for the generation of entangled photon triplets by third-order spontaneous parametric downconversion in optical fibers.
We present an experimental proposal for the generation of photon triplets based on third-order spontaneous parametric downconversion in thin optical fibers. Our analysis includes expressions for the quantum state, which describes the photon triplets and for the generation rate in terms of all experimental parameters. We also present, for a specific source design, numerically calculated generati...
متن کامل