Frequency correlation requirements on the biphoton wavefunction in an induced coherence experiment between separate sources
arXiv:2005.03741 · doi:10.1103/PhysRevA.102.053711
Abstract
There is renewed interest in using the coherence between beams generated in separate down-converter sources for new applications in imaging, spectroscopy, microscopy and optical coherence tomography (OCT). These schemes make use of continuous wave (CW) pumping in the low parametric gain regime, which produces frequency correlations, and frequency entanglement, between signal-idler pairs generated in each single source. But can induced coherence still be observed if there is no frequency correlation, so the biphoton wavefunction is factorable? We will show that this is the case, and this might be an advantage for OCT applications. High axial resolution requires a large bandwidth. For CW pumping this requires the use of short nonlinear crystals. This is detrimental since short crystals generate small photon fluxes. We show that the use of ultrashort pump pulses allows improving axial resolution even for long crystal that produce higher photon fluxes.
References in corpus (21)
- Quantum Imaging with Undetected Photons
- Heralded Generation of Ultrafast Single Photons in Pure Quantum States
- Infrared Spectroscopy with Visible Light
- Demonstration of Dispersion-Cancelled Quantum-Optical Coherence Tomography
- Pulsed squeezed light: simultaneous squeezing of multiple modes
- Entanglement quantification and purification in continuous variable systems
- Terahertz Quantum Sensing
- Theory of Two-Photon Interactions with Broadband Down-Converted Light and Entangled Photons
- Shaping the waveform of entangled photons
- Tunable Optical Coherence Tomography in the Infrared Range Using Visible Photons
- Two-photon coincident-frequency-entanglement via extended phase matching
- Optical sectioning in induced coherence tomography with frequency-entangled photons
- Measurement of infrared optical constants with visible photons
- Induced coherence with and without induced emission
- Broadening the bandwidth of entangled photons: a step towards the generation of extremely short biphotons
- Conclusive Precision Bounds for SU(1,1) Interferometers
- Spatiotemporal correlations in entangled photons generated by spontaneous parametric down conversion
- Classical Imaging with Undetected Light
- Quantum Imaging for Semiconductor Industry
- Generation of indistinguishable and pure heralded single photons with tunable bandwidth
- First-order interference of nonclassical light emitted spontaneously at different times