Evaluation of a multimode fiber optic low coherence interferometer for path length resolved Doppler measurments of diffuse light

Babu Varghese; Vinayakrishnan Rajan; Ton van Leeuwen; Wiendelt Steenbergen

doi:10.1063/1.2823558

Evaluation of a multimode fiber optic low coherence interferometer for path length resolved Doppler measurments of diffuse light

Babu Varghese, Vinayakrishnan Rajan, Ton van Leeuwen, Wiendelt Steenbergen

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

The performance of a graded index multimode fiber optic low coherence Mach-Zehnder interferometer with phase modulation is analyzed. Investigated aspects were its ability to measure path length distributions and to perform path length resolved Doppler measurements of multiple scattered photons in a turbid suspension of particles undergoing Brownian and translational motion. The path length resolution of this instrument is compared with a system using single mode fibers for illumination and detection. The optical path lengths are determined from the zero order moment of the phase modulation peak in the power spectrum. The weighted first moment, which is equal to the average Doppler shift, shows a linear response for different mean flow velocities within the physiological range

Original language	Undefined
Pages (from-to)	126103-1-126103-3
Number of pages	3
Journal	Review of scientific instruments
Volume	78
Issue number	12
DOIs	https://doi.org/10.1063/1.2823558
Publication status	Published - 2007

Keywords

IR-76433
METIS-243926

Access to Document

10.1063/1.2823558

evaluation
open

Cite this

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title = "Evaluation of a multimode fiber optic low coherence interferometer for path length resolved Doppler measurments of diffuse light",

abstract = "The performance of a graded index multimode fiber optic low coherence Mach-Zehnder interferometer with phase modulation is analyzed. Investigated aspects were its ability to measure path length distributions and to perform path length resolved Doppler measurements of multiple scattered photons in a turbid suspension of particles undergoing Brownian and translational motion. The path length resolution of this instrument is compared with a system using single mode fibers for illumination and detection. The optical path lengths are determined from the zero order moment of the phase modulation peak in the power spectrum. The weighted first moment, which is equal to the average Doppler shift, shows a linear response for different mean flow velocities within the physiological range",

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Evaluation of a multimode fiber optic low coherence interferometer for path length resolved Doppler measurments of diffuse light. / Varghese, Babu; Rajan, Vinayakrishnan; van Leeuwen, Ton; Steenbergen, Wiendelt.

In: Review of scientific instruments, Vol. 78, No. 12, 2007, p. 126103-1-126103-3.

Research output: Contribution to journal › Article › Academic › peer-review

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T1 - Evaluation of a multimode fiber optic low coherence interferometer for path length resolved Doppler measurments of diffuse light

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AU - Rajan, Vinayakrishnan

AU - van Leeuwen, Ton

AU - Steenbergen, Wiendelt

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AB - The performance of a graded index multimode fiber optic low coherence Mach-Zehnder interferometer with phase modulation is analyzed. Investigated aspects were its ability to measure path length distributions and to perform path length resolved Doppler measurements of multiple scattered photons in a turbid suspension of particles undergoing Brownian and translational motion. The path length resolution of this instrument is compared with a system using single mode fibers for illumination and detection. The optical path lengths are determined from the zero order moment of the phase modulation peak in the power spectrum. The weighted first moment, which is equal to the average Doppler shift, shows a linear response for different mean flow velocities within the physiological range

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