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Opt Lett. 2004 Oct 15;29(20):2399-401.

Quantitative phase imaging using actively stabilized phase-shifting low-coherence interferometry.

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  • 1G. R. Harrison Spectroscopy Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.


We describe a quantitative phase-imaging interferometer in which phase shifting and noise cancellation are performed by an active feedback loop using a reference laser. Depth gating via low-coherence light allows phase measurement from weakly reflecting biological samples. We demonstrate phase images from a test structure and living cells.

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