8 papers
Quantum metrology of two-photon absorption
Carlos Sánchez Muñoz, Gaetano Frascella, Frank Schlawin
Two-photon absorption (TPA) is of fundamental importance in super-resolution imaging and spectroscopy. Its nonlinear character allows for the prospect of using quantum resources, s…
Multimode optical parametric amplification in the phase-sensitive regime
Gaetano Frascella, Roman V. Zakharov, Olga V. Tikhonova +1
Phase-sensitive optical parametric amplification of squeezed states helps to overcome detection loss and noise and thus increase the robustness of sub-shot-noise sensing. Because s…
Broadening the high sensitivity range of squeezing-assisted interferometers by means of two-channel detection
Gaurav Shukla, Dariya Salykina, Gaetano Frascella +3
For a squeezing-enhanced SU(2) interferometer, we theoretically investigate the possibility to broaden the phase range of sub-shot-noise sensitivity. We show that this goal can be…
Reconstructing 2D spatial modes for classical and quantum light
Valentin A. Averchenko, Gaetano Frascella, Mahmoud Kalash +2
We propose a method for finding 2D spatial modes of thermal field through a direct measurement of the field intensity and an offline analysis of its spatial fluctuations. Using thi…
Optical Coherence Tomography with a nonlinear interferometer in the high parametric gain regime
Gerard J. Machado, Gaetano Frascella, Juan P. Torres +1
We demonstrate optical coherence tomography based on an SU(1,1) nonlinear interferometer with high-gain parametric down-conversion. For imaging and sensing applications, this schem…
Experimental reconstruction of spatial Schmidt modes for a wide-field SU(1,1) interferometer
Gaetano Frascella, Roman V. Zakharov, Olga V. Tikhonova +1
We study the spatial mode content at the output of a wide-field SU(1,1) interferometer, i.e. a nonlinear interferometer comprising two coherently-pumped spatially-multimode optical…