Abstract
Single-beam laser Doppler measurements of flow velocity are only sensitive to the velocity component parallel to the optical axis. We describe a simple modification to a standard Doppler optical coherence tomography (OCT) system using a single sample beam that provides velocity information from multiple angles within the beam. By introducing a glass plate midway into the OCT beam path, the sample beam is divided into several components, each with a different group delay and each providing a separate interferogram with its own effective Doppler angle. By combining the Doppler shift measured in each of these component interferograms, the flow velocity vector is fully determined.
Original language | English (US) |
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Pages (from-to) | 506-508 |
Number of pages | 3 |
Journal | Optics Letters |
Volume | 32 |
Issue number | 5 |
DOIs | |
State | Published - Mar 1 2007 |
Externally published | Yes |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics