Depolarization characteristics of spatial modes in imaging probe using short multimode fiber

Sato, Manabu; Eto, Kai; Masuta, Junpei; Nishidate, Izumi

doi:10.1364/ao.57.010083

Cited by 6 publications

(4 citation statements)

References 24 publications

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“…It follows that the degree of polarization of the axial beam takes its initial value at ωz = mπ (m = 1, 2, 3 …). The depolarization characteristics of the imaging probe with the multi-mode fiber with a length of 6.2 mm were studied in [56]. It is shown that the depolarization coefficient for the modal fields LP01 and LP21 can be estimated at 0.7.…”

Section: Linear Polarizationmentioning

confidence: 99%

Depolarization of Light in Optical Fibers: Effects of Diffraction and Spin-Orbit Interaction

Petrov

2021

Fibers

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Polarization is measured very often to study the interaction of light and matter, so the description of the polarization of light beams is of both practical and fundamental interest. This review discusses the polarization properties of structured light in multimode graded-index optical fibers, with an emphasis on the recent advances in the area of spin-orbit interactions. The basic physical principles and properties of twisted light propagating in a graded index fiber are described: rotation of the polarization plane, Laguerre–Gauss vector beams with polarization-orbital angular momentum entanglement, splitting of degenerate modes due to spin-orbit interaction, depolarization of light beams, Berry phase and 2D and 3D degrees of polarizations, etc. Special attention is paid to analytical methods for solving the Maxwell equations of a three-component field using perturbation analysis and quantum mechanical approaches. Vector and tensor polarization degrees for the description of strongly focused light beams and their geometrical interpretation are also discussed.

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Section: Linear Polarizationmentioning

confidence: 99%

Depolarization of Light in Optical Fibers: Effects of Diffraction and Spin-Orbit Interaction

Petrov

2021

Fibers

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“…We have previously studied the relations among LP modes, depolarizations, and imaging in SMMF [28]. The refractive index profile   2 n r of the SMMF is represented by:…”

Section: Mode Patternmentioning

confidence: 99%

“…For designing an SMMF, the modulation transfer function was evaluated using a thin random phase screen model [27]. The mode patterns resulting from the propagation in SMMF and the distribution of depolarizations have been investigated [28]. Using an SMMF with a diameter of 125 µm and a length of 5.12 mm, FF-OCM has been demonstrated for the first time.…”

Section: Introductionmentioning

confidence: 99%

In Vivo Rat Brain Imaging through Full-Field Optical Coherence Microscopy Using an Ultrathin Short Multimode Fiber Probe

et al. 2019

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We demonstrate full-field optical coherence microscopy (OCM) using an ultrathin forward-imaging short multimode fiber (SMMF) probe with a core diameter of 50 μm, outer diameter of 125 μm, and length of 7.4 mm, which is a typical graded-index multimode fiber used for optical communications. The axial and lateral resolutions were measured to be 2.14 μm and 2.3 μm, respectively. By inserting the SMMF 4 mm into the cortex of an in vivo rat brain, scanning was performed to a depth of 147 μm from the SMMF facet with a field of view of 47 μm. Three-dimensional (3D) OCM images were obtained at depths ranging from approximately 20 μm to 90 μm. Based on the morphological information of the resliced 3D images and the dependence of the integration of the OCM image signal on the insertion length, the obtained 3D information of nerve fibers has been presented.

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“…) ，SMMF のモードパターンとそれに伴う偏光解消分布を報告した29) ．直径 125 μm，長さ 5.12 mm の SMMF を OCM に用いて乾燥したメダカのヒレの断層画像を測定し30) ，2018 には直径 125 μm，長さ 7.4 mm の SMMF を用いて，in vivo ラット脳を測定した31) ．…”

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Sectional Imaging of <i>in vivo</i> Rat Brain Using Short Multimode Fiber Probe

Sato

Eto

Masuta

et al. 2020

JJSLSM

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We demonstrate full-field optical coherence microscopy (FF-OCM) using an ultrathin forward-imaging short multimode fiber (SMMF) probe with a core diameter of 50 μm, outer diameter of 125 μm, and length of 7.4 mm, which is a typical graded-index multimode fiber used for optical communications. The axial and lateral resolutions were measured to be 2.14 μm and 2.3 μm, respectively. Inserting the SMMF 4 mm into the cortex of an in vivo rat brain, depths were scanned from a SMMF facet to 147 μm with a field of view of 47 μm. Three-dimensional (3D) OCM images were obtained at depths from about 20 μm to 90 μm. From morphological information of the resliced 3D images and the dependence of the integration of the OCM image signal on the inserted distance, the 3D information of nerve fibers have been demonstrated.

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Depolarization characteristics of spatial modes in imaging probe using short multimode fiber

Cited by 6 publications

References 24 publications

Depolarization of Light in Optical Fibers: Effects of Diffraction and Spin-Orbit Interaction

Depolarization of Light in Optical Fibers: Effects of Diffraction and Spin-Orbit Interaction

In Vivo Rat Brain Imaging through Full-Field Optical Coherence Microscopy Using an Ultrathin Short Multimode Fiber Probe

Sectional Imaging of <i>in vivo</i> Rat Brain Using Short Multimode Fiber Probe

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