Multimode Interference Dynamic Light Scattering

Abstract

When dealing with dynamic scattering systems, being able to collect strong signals while maintaining a high signal-to-noise ratio (SNR) is critical. It is well known that a spatially coherent measurement provides the largest SNR, while a partially coherent one provides better means for proper spatial averaging. In this Letter, we present a robust implementation of a fiber-based, single-mode, common-path interferometer assisted by multimode interference. We show that light can be efficiently collected from larger coherent regions while keeping a high SNR that is comparable to that of a pure single-mode arrangement. Additionally, our implementation allows having both a stable local oscillator encoding information on the fiber-medium interface and a linear dependence on scattering density. These two attributes, in turn, permit accessing the effective optical properties of the dynamic complex system.

Publication Date

9-1-2018

Publication Title

Optics Letters

Volume

43

Issue

17

Number of Pages

4232-4235

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1364/OL.43.004232

Socpus ID

85052570451 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85052570451

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