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Dibbyan Mazumder on Muck Rack

Dibbyan Mazumder

As seen in: Optica
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Articles

1060 nm interferometric near-infrared spectroscopy

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By Rabisankar Samanta, Vivek Srinivasan, Dibbyan Mazumder, Oybek Kholiqov
| Optica Verified
Recently, interferometric near-infrared spectroscopy (iNIRS) has emerged to measure diffuse light field fluctuations with time-of-flight (TOF) resolution. Yet, current iNIRS implementations suffer from low signal-to-noise ratio (SNR). Longer wavelengths, with lower photon energy, lower reduced scattering in biological tissues, and higher permissible exposures, have the potential to increase SNR. Here, we investigate iNIRS at 1060 nm.
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Superconducting nanowire single-photon sensing of cerebral blood flow

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By Nisan Ozana, Mitchell Robinson, Alexander I. Zavriyev, Dibbyan Mazumder
| spiedigitallibrary.org
1. Introduction Diffuse correlation spectroscopy (DCS) is a non-invasive optical method for the measurement of blood flow (BF).1 In DCS, the tissue is illuminated by a long coherence length near-infrared laser, and the speckle pattern formed by moving scatterers, mostly red blood cells, modulates the detected light. The decay of the measured temporal intensity autocorrelation function [g2(τ)] originated by the speckle fluctuations provides an index of blood flow (BFi),2 with units cm2/s.
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