Abstract
Optical coherence-domain reflectometry and laser-based ultrasound detection have been combined with the use of adaptive optics to detect ultrasound through turbid media. The dynamic hologram in a photorefractive quantum-well device performs as a coherence gate that eliminates multiply scattered background. Quadrature homodyne detection conditions are selected by the choice of center wavelength of the pulse spectrum, requiring no active stabilization or feedback. A depth resolution of 30 μm was achieved, with a pulse duration of nominally 120 fs for ultrasound detection through turbid media up to optical thicknesses of 11 mean free scattering lengths.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 819-821 |
| Number of pages | 3 |
| Journal | Optics letters |
| Volume | 28 |
| Issue number | 10 |
| DOIs | |
| State | Published - May 15 2003 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics