Papers Published

1. Ahn, A; Yang, C; Wax, A; Popescu, G; Fang-Yen, C; Badizadegan, K; Dasari, RR; Feld, MS, Harmonic phase-dispersion microscope with a Mach-Zehnder interferometer., Applied Optics, vol. 44 no. 7 (March, 2005), pp. 1188-1190 [doi] .
   (last updated on 2023/06/01)

   Abstract:
   Harmonic phase-dispersion microscopy (PDM) is a new imaging technique in which contrast is provided by differences in refractive index at two harmonically related wavelengths. We report a new configuration of the harmonic phase-dispersion microscope in a Mach-Zehnder geometry as an instrument for imaging biological samples. Several improvements on the earlier design are demonstrated, including a single-pass configuration and acousto-optic modulators for generating the heterodyne signals without mechanical arm scanning. We demonstrate quantitative phase-dispersion images of test structures and biological samples.

   Keywords:
   acousto-optical modulation;biological techniques;light interferometry;Mach-Zehnder interferometers;optical design techniques;optical dispersion;optical microscopes;optical microscopy;refractive index;