Random laser as a potential tool for the determination of the scattering coefficient

Martin Hohmann; Moritz Späth; Dongqin Ni; Dominique Dörner; Benjamin Lengenfelder; Florian Klämpfl; Michael Schmidt

doi:10.1364/BOE.432052

Random laser as a potential tool for the determination of the scattering coefficient

Biomed Opt Express. 2021 Aug 6;12(9):5439-5451. doi: 10.1364/BOE.432052. eCollection 2021 Sep 1.

Authors

Martin Hohmann^{1

2

3}, Moritz Späth^{1

2

3}, Dongqin Ni^{1

2}, Dominique Dörner^{1

2}, Benjamin Lengenfelder^{1

2}, Florian Klämpfl^{1

2}, Michael Schmidt^{1

2}

Affiliations

¹ Institute of Photonic Technologies (LPT), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Germany.
² Erlangen Graduate School in Advanced Optical Technologies (SAOT), Paul-Gordan-Straße 6, 91052 Erlangen, Germany.
³ Shared co-authors.

Abstract

The determination of the optical properties of a turbid medium is a major topic in the field of optics. Generally, they comprise the parameters µ _a , µ _s , g and n. There is, however, a lack of techniques for the direct determination of the scattering coefficient µ _s . This study, therefore, proposes the random laser (RL) as a tool to directly measure µ _s - and not $μ_{s}^{'}$ . Evidence is found that it is possible to determine µ _s in the diffusive regime by means of the RL. Based on these findings, a local model of the RL is developed and presented in this study.