Direct measurement of phase of foreward-scattered light using polarization heterodyne interferometer

G. Ganesh Chandan; Ram M. Vasu; S. Asokan

doi:10.1117/12.447354

30 October 2001 Direct measurement of phase of foreward-scattered light using polarization heterodyne interferometer

G. Ganesh Chandan, Ram M. Vasu, S. Asokan

Proceedings Volume 4596, Advanced Photonic Sensors and Applications II; (2001) https://doi.org/10.1117/12.447354
Event: International Symposium on Photonics and Applications, 2001, Singapore, Singapore

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.

Citation Download Citation

G. Ganesh Chandan, Ram M. Vasu, and S. Asokan "Direct measurement of phase of foreward-scattered light using polarization heterodyne interferometer", Proc. SPIE 4596, Advanced Photonic Sensors and Applications II, (30 October 2001); https://doi.org/10.1117/12.447354

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KEYWORDS

Phase measurement

Heterodyning

Photons

Polarization

Scattering

Interferometers

Light scattering

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