Depolarization of light in optical fibers

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

Fibers ◽

10.3390/fib9060034 ◽

2021 ◽

Vol 9 (6) ◽

pp. 34

Author(s):

Nikolai I. Petrov

Keyword(s):

Optical Fibers ◽

Berry Phase ◽

Polarization Plane ◽

Orbit Interaction ◽

Spin Orbit ◽

Tensor Polarization ◽

Spin Orbit Interaction ◽

Graded Index ◽

Depolarization Of Light ◽

Light Beams

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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Depolarization of light in microstructured fibers filled with liquid crystals

Opto-Electronics Review ◽

10.2478/s11772-008-0070-8 ◽

2009 ◽

Vol 17 (2) ◽

Cited By ~ 5

Author(s):

D. Budaszewski ◽

A. Domański ◽

A. Czapla ◽

S. Ertman ◽

T. Woliński ◽

...

Keyword(s):

Liquid Crystal ◽

Liquid Crystals ◽

Electric Field ◽

Optical Fibers ◽

Matrix Method ◽

Degree Of Polarization ◽

Microstructured Fibers ◽

Microstructured Optical Fibers ◽

Depolarization Of Light ◽

Light Depolarization

AbstractIn the paper we analyze microstructured optical fibers filled with typical nematic liquid crystals, i.e., 5CB and 6CHBT under influence of external electric field or temperature. We use the modified Mueller matrix method with an additional depolarization matrix to calculate degree of polarization changes of the light propagating in the liquid-crystal infiltrated microstructured optical fibers. Preliminary experimental results of light depolarization measurements during propagation in these microstructured fibers are also presented.

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Supercontinuum Generation in Optical Fibers

10.1017/cbo9780511750465 ◽

2009 ◽

Cited By ~ 262

Keyword(s):

Optical Fibers ◽

Supercontinuum Generation

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High-voltage monitoring by the fiber-optic recirculating measuring system

Izmeritel`naya Tekhnika ◽

10.32446/0368-1025it.2020-2-38-44 ◽

2020 ◽

pp. 38-44

Author(s):

A. V. Polyakov ◽

M. A. Ksenofontov

Keyword(s):

Optical Fibers ◽

High Voltage ◽

Optical Sensors ◽

Electromagnetic Interference ◽

Fiber Optic ◽

Electric Power Industry ◽

Measuring System ◽

Voltage Range ◽

External Electromagnetic Fields ◽

Optic Communication

Optical technologies for measuring electrical quantities attract great attention due to their unique properties and significant advantages over other technologies used in high-voltage electric power industry: the use of optical fibers ensures high stability of measuring equipment to electromagnetic interference and galvanic isolation of high-voltage sensors; external electromagnetic fields do not influence the data transmitted from optical sensors via fiber-optic communication lines; problems associated with ground loops are eliminated, there are no side electromagnetic radiation and crosstalk between the channels. The structure and operation principle of a quasi-distributed fiber-optic high-voltage monitoring system is presented. The sensitive element is a combination of a piezo-ceramic tube with an optical fiber wound around it. The device uses reverse transverse piezoelectric effect. The measurement principle is based on recording the change in the recirculation frequency under the applied voltage influence. When the measuring sections are arranged in ascending order of the measured effective voltages relative to the receiving-transmitting unit, a relative resolution of 0,3–0,45 % is achieved for the PZT-5H and 0,8–1,2 % for the PZT-4 in the voltage range 20–150 kV.

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