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Proceedings Paper

Direct measurement of phase of foreward-scattered light using polarization heterodyne interferometer
Author(s): G. Ganesh Chandan; Ram M. Vasu; S. Asokan
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Paper Abstract

We describe direct measurement of phase of ballistic photons transmitted through objects hidden in a turbid medium using a polarization interferometer employing a rotating analyzer. The unwrapped phase difference measurements from interferometry was possible for medium levels of turbidity and accurate phase measurement from the sinusoidal intensity was not detectable when l/l* is increased beyond 4.3. The measured phase on reconstruction using standard tomographic algorithms resulted in the recovery of the refractive index profile of the object hidden in the turbid medium.

Paper Details

Date Published: 30 October 2001
PDF: 7 pages
Proc. SPIE 4596, Advanced Photonic Sensors and Applications II, (30 October 2001); doi: 10.1117/12.447354
Show Author Affiliations
G. Ganesh Chandan, Indian Institute of Science/Bangalore (India)
Ram M. Vasu, Indian Institute of Science/Bangalore (India)
S. Asokan, Indian Institute of Science/Bangalore (India)

Published in SPIE Proceedings Vol. 4596:
Advanced Photonic Sensors and Applications II
Anand Krishna Asundi; Wolfgang Osten; Vijay K. Varadan, Editor(s)

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