Physically meaningful depolarization metric based on the differential Mueller matrix

Ortega-Quijano, Noé; Fanjul-Vélez, F.; Arce-Diego, J. L.

doi:10.1364/ol.40.003280

Cited by 18 publications

(17 citation statements)

References 29 publications

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“…It is now interesting to analyze the depolarizing properties of the M ∆ LD matrix. There are several depolarization metrics that can be used to quantify the depolarizing properties of a sample [33,[41][42][43][44][45]. In this work we use the Cloude entropy, which is a well-established metric to characterize the overall depolarizing nature of a given Mueller matrix [41].…”

Section: A Stochastic Depolarization Model Of An Ensemble Of Randomentioning

confidence: 99%

Orthogonality-breaking sensing model based on the instantaneous Stokes vector and the Mueller calculus

Ortega-Quijano¹,

Fade²,

Roche³

et al. 2016

J. Opt. Soc. Am. A

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Polarimetric sensing by orthogonality breaking has been recently proposed as an alternative technique for performing direct and fast polarimetric measurements using a specific dual-frequency dual-polarization (DFDP) source. Based on the instantaneous Stokes-Mueller formalism to describe the high-frequency evolution of the DFDP beam intensity, we thoroughly analyze the interaction of such a beam with birefringent, dichroic and depolarizing samples. This allows us to confirm that orthogonality breaking is produced by the sample diattenuation, whereas this technique is immune to both birefringence and diagonal depolarization. We further analyze the robustness of this technique when polarimetric sensing is performed through a birefringent waveguide, and the optimal DFDP source configuration for fiber-based endoscopic measurements is subsequently identified. Finally, we consider a stochastic depolarization model based on an ensemble of random linear diattenuators, which makes it possible to understand the progressive vanishing of the detected orthogonality breaking signal as the spatial heterogeneity of the sample increases, thus confirming the insensitivity of this method to diagonal depolarization. The fact that the orthogonality breaking signal is exclusively due to the sample dichroism is an advantageous feature for the precise decoupled characterization of such an anisotropic parameter in samples showing several simultaneous effects.

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Section: A Stochastic Depolarization Model Of An Ensemble Of Randomentioning

confidence: 99%

Orthogonality-breaking sensing model based on the instantaneous Stokes vector and the Mueller calculus

Ortega-Quijano¹,

Fade²,

Roche³

et al. 2016

J. Opt. Soc. Am. A

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“…Since it is known that the depolarization index and the entropy have a restricted relationship [78], they would show similar properties. In addition, differential depolarization index was recently suggested by Ortega-Quijano et al, and was shown to be effective for enhancing the depolarization contrast [79] and insensitive to an artifact by the diattenuation [80] like Lorentz depolarization indices [65]. It would be interesting to compare these parameters, and remains for future studies.…”

Section: Discussionmentioning

confidence: 94%

Estimation of Jones matrix, birefringence and entropy using Cloude-Pottier decomposition in polarization-sensitive optical coherence tomography

Yamanari¹,

Tsuda²,

Kokubun³

et al. 2016

Biomed. Opt. Express

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Estimation of polarimetric parameters has been a fundamental issue to assess biological tissues that have form birefringence or polarization scrambling in polarizationsensitive optical coherence tomography (PS-OCT). We present a mathematical framework to provide a maximum likelihood estimation of the target covariance matrix and its incoherent target decomposition to estimate a Jones matrix of a dominant scattering mechanism, called Cloude-Pottier decomposition, thereby deriving the phase retardation and the optic axis of the sample. In addition, we introduce entropy that shows the randomness of the polarization property. Underestimation of the entropy at a low sampling number is mitigated by asymptotic quasi maximum likelihood estimator. A bias of the entropy from random noises is corrected to show only the polarization property inherent in the sample. The theory is validated with experimental measurements of a glass plate and waveplates, and applied to the imaging of a healthy human eye anterior segment as an image filter.

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“…Scattering will occur when the guest material occupies only a localized region within the host material [4]. Scattering interactions are often dominant mechanisms affecting light propagation in biological tissues.…”

Section: Optical Properties Of Biological Tissuesmentioning

confidence: 99%

Considerations of education in the field of biophotonics in engineering: the experience of the subject fundamentals of biophotonics

Fanjul-Vélez

Arce-Diego

2017

Photonics, Devices, and Systems VII

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Education in the field of photonics is usually somehow complex due to the fact that most of the programs include just a few subjects on the field, apart from specific Master programs in Photonics. There are also specific doctorate programs dealing with photonics. Apart from the problems shared with photonics in education in general, biophotonics specifically needs an interdisciplinary approach between biomedical and technical or scientific fields. In this work, we present our education experience in teaching the subject Fundamentals of Biophotonics, intended preferentially to engineering Bachelor and Master degrees students, but also to science and medicine students. First it was necessary to join a teaching group coming from the scientific technical and medical fields, working together in the subject. This task was easier as our research group, the Applied Optical Techniques group, had previous contacts and experience in working with medicine professors and medical doctors at hospitals. The orientation of the subject, intended for both technical and medical students, has to be carefully selected. All this information could be employed by other education institutions willing to implement studies on biomedical optics.

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Physically meaningful depolarization metric based on the differential Mueller matrix

Cited by 18 publications

References 29 publications

Orthogonality-breaking sensing model based on the instantaneous Stokes vector and the Mueller calculus

Orthogonality-breaking sensing model based on the instantaneous Stokes vector and the Mueller calculus

Estimation of Jones matrix, birefringence and entropy using Cloude-Pottier decomposition in polarization-sensitive optical coherence tomography

Considerations of education in the field of biophotonics in engineering: the experience of the subject fundamentals of biophotonics

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