Spatiotemporal heterodyne detection

Michael Atlan (1) , Michel Gross (2)

1 IJM (UMR_7592) - Institut Jacques Monod
2 LKB (Lhomond) - Laboratoire Kastler Brossel

We describe a scheme into which a camera is turned into an efficient tunable frequency filter of a few Hertz bandwidth in an off-axis, heterodyne optical mixing configuration, enabling to perform parallel, high-resolution coherent spectral imaging. This approach is made possible through the combination of a spatial and temporal modulation of the signal to reject noise contributions. Experimental data obtained with dynamically scattered light by a suspension of particles in brownian motion is interpreted.

Domaines: Optique [physics.optics]

Michael Atlan, Michel Gross. Spatiotemporal heterodyne detection. Journal of the Optical Society of America. A Optics, Image Science, and Vision, 2007, 24, pp.2701-2709. ⟨10.1364/JOSAA.24.002701⟩. ⟨hal-00411788⟩