Experimental reconstruction of spatial Schmidt modes for a wide-field SU(1,1) interferometer
Frascella G, Zakharov RV, Tikhonova OV, Chekhova M (2019)
Publication Type: Journal article
Publication year: 2019
Journal
Book Volume: 29
Article Number: 124013
Journal Issue: 12
Abstract
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 parametric amplifiers placed in sequence with a focusing element in between. This device is expected to provide a phase sensitivity below the shot-noise limit for multiple modes over a broad angular range. To reconstruct the spatial modes and their weights, we implement a simple method based on the acquisition of only intensity distributions. The eigenmode decomposition of the field is obtained through the measurement of the covariance of intensities at different spatial points. We investigate both the radial and azimuthal (orbital angular momentum) modes and show that their total number is large enough to enable applications of the interferometer in spatially-resolved phase measurements.
Authors with CRIS profile
Gaetano Frascella
Lehrstuhl für Experimentalphysik (Optik)
Maria Chekhova
Lehrstuhl für Experimentalphysik (Optik)
Involved external institutions
Russian Federation (RU)How to cite
APA:
Frascella, G., Zakharov, R.V., Tikhonova, O.V., & Chekhova, M. (2019). Experimental reconstruction of spatial Schmidt modes for a wide-field SU(1,1) interferometer. Laser Physics, 29(12). https://dx.doi.org/10.1088/1555-6611/ab4bdc
MLA:
Frascella, Gaetano, et al. "Experimental reconstruction of spatial Schmidt modes for a wide-field SU(1,1) interferometer." Laser Physics 29.12 (2019).
BibTeX: Download